Rotational Stability - Revision history

Mpollei@gfnet.com at 20:48, 11 July 2023

2023-07-11T20:48:40Z

← Older revision		Revision as of 20:48, 11 July 2023
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Stability Analysis of Concrete Structures (EM 1110-2-2100) \| Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE~~, 2005~~]]		{{Document Icon}} [[Stability Analysis of Concrete Structures (EM 1110-2-2100) \| Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE]]

	<!-- In the location of an in text citation, simply enclose the citation as follows: <ref> citation </ref>. Citations will automatically populate. Learn more at https://www.mediawiki.org/wiki/Help:Cite. -->		<!-- In the location of an in text citation, simply enclose the citation as follows: <ref> citation </ref>. Citations will automatically populate. Learn more at https://www.mediawiki.org/wiki/Help:Cite. -->

Rmanwaring at 20:25, 20 December 2022

2022-12-20T20:25:10Z

← Older revision		Revision as of 20:25, 20 December 2022
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	[[Category:Global Stability of a Dam]]		[[Category:Global Stability of a Dam]]
	----		----
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="EM2100">[[Stability Analysis of Concrete Structures (EM 1110-2-2100)\|Stability Analysis of Concrete Structures (EM 1110-2-2100) ~~(U.S. Army Corps of Engineers)~~]]</ref>		"The factor of safety approach established for sliding and [[flotation]] is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="EM2100">[[Stability Analysis of Concrete Structures (EM 1110-2-2100) \| Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE, 2005]]</ref>

	The analysis for determination of the resultant location has historically been termed an overturning [[stability]] analysis. Technically, this is a misnomer since a foundation bearing, crushing of the structure toe, and/or a sliding failure will occur before the structure overturns. It is recommended that the term "overturning stability analysis" be replaced with "resultant location analysis". <ref name="EM2100"/>		The analysis for determination of the resultant location has historically been termed an overturning [[stability]] analysis. Technically, this is a misnomer since a foundation bearing, crushing of the structure toe, and/or a sliding failure will occur before the structure overturns. It is recommended that the term "overturning stability analysis" be replaced with "resultant location analysis". <ref name="EM2100"/>

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Stability Analysis of Concrete Structures (EM 1110-2-2100)\|Stability Analysis of Concrete Structures (EM 1110-2-2100) ~~(U.S. Army Corps of Engineers)~~]]		{{Document Icon}} [[Stability Analysis of Concrete Structures (EM 1110-2-2100) \| Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE, 2005]]

	<!-- In the location of an in text citation, simply enclose the citation as follows: <ref> citation </ref>. Citations will automatically populate. Learn more at https://www.mediawiki.org/wiki/Help:Cite. -->		<!-- In the location of an in text citation, simply enclose the citation as follows: <ref> citation </ref>. Citations will automatically populate. Learn more at https://www.mediawiki.org/wiki/Help:Cite. -->

Grichards at 17:57, 14 December 2022

2022-12-14T17:57:35Z

← Older revision		Revision as of 17:57, 14 December 2022
Line 3:		Line 3:
	[[Category:Global Stability of a Dam]]		[[Category:Global Stability of a Dam]]
	----		----
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="~~2100~~">[[Stability Analysis of Concrete Structures (EM 1110-2-2100)\|Stability Analysis of Concrete Structures (EM 1110-2-2100) (U.S. Army Corps of Engineers)]]</ref>		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="EM2100">[[Stability Analysis of Concrete Structures (EM 1110-2-2100)\|Stability Analysis of Concrete Structures (EM 1110-2-2100) (U.S. Army Corps of Engineers)]]</ref>

	The analysis for determination of the resultant location has historically been termed an overturning [[stability]] analysis. Technically, this is a misnomer since a foundation bearing, crushing of the structure toe, and/or a sliding failure will occur before the structure overturns. It is recommended that the term "overturning stability analysis" be replaced with "resultant location analysis". <ref name="~~2100~~"/>		The analysis for determination of the resultant location has historically been termed an overturning [[stability]] analysis. Technically, this is a misnomer since a foundation bearing, crushing of the structure toe, and/or a sliding failure will occur before the structure overturns. It is recommended that the term "overturning stability analysis" be replaced with "resultant location analysis". <ref name="EM2100"/>

	==Best Practices Resources==		==Best Practices Resources==

Grichards at 17:57, 14 December 2022

2022-12-14T17:57:11Z

← Older revision		Revision as of 17:57, 14 December 2022
Line 3:		Line 3:
	[[Category:Global Stability of a Dam]]		[[Category:Global Stability of a Dam]]
	----		----
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="~~Small Dams~~">[[~~Design~~ of ~~Small Dams~~\| ~~Design~~ of ~~Small Dams~~ (~~United States Bureau~~ of ~~Reclamation, 1987~~)]]</ref>		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="2100">[[Stability Analysis of Concrete Structures (EM 1110-2-2100)\|Stability Analysis of Concrete Structures (EM 1110-2-2100) (U.S. Army Corps of Engineers)]]</ref>

	The analysis for determination		The analysis for determination of the resultant location has historically been termed an overturning [[stability]] analysis. Technically, this is a misnomer since a foundation bearing, crushing of the structure toe, and/or a sliding failure will occur before the structure overturns. It is recommended that the term "overturning stability analysis" be replaced with "resultant location analysis". <ref name="2100"/>
	of the resultant location ~~in prior guidance~~ has been termed an overturning [[stability]] analysis. ~~This~~ is a misnomer
	since a foundation bearing, crushing of the structure toe, and/or a sliding failure will occur before the structure
	overturns. ~~This manual replaces~~ the term overturning stability analysis with resultant location.

	==Best Practices Resources==		==Best Practices Resources==

Grichards at 17:21, 14 December 2022

2022-12-14T17:21:46Z

← Older revision		Revision as of 17:21, 14 December 2022
Line 4:		Line 4:
	----		----
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="Small Dams">[[Design of Small Dams\| Design of Small Dams (United States Bureau of Reclamation, 1987)]]</ref>		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="Small Dams">[[Design of Small Dams\| Design of Small Dams (United States Bureau of Reclamation, 1987)]]</ref>

	~~<code>{{Video Icon}} [[Page Name \| Link Text]]</code>~~

	The analysis for determination		The analysis for determination

Grichards at 17:20, 14 December 2022

2022-12-14T17:20:18Z

← Older revision		Revision as of 17:20, 14 December 2022
Line 5:		Line 5:
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="Small Dams">[[Design of Small Dams\| Design of Small Dams (United States Bureau of Reclamation, 1987)]]</ref>		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="Small Dams">[[Design of Small Dams\| Design of Small Dams (United States Bureau of Reclamation, 1987)]]</ref>

	<code>~~==hello==~~</code>		<code>{{Video Icon}} [[Page Name \| Link Text]]</code>
	~~==hello==~~
	The analysis for determination		The analysis for determination
	of the resultant location in prior guidance has been termed an overturning [[stability]] analysis. This is a misnomer		of the resultant location in prior guidance has been termed an overturning [[stability]] analysis. This is a misnomer

Grichards at 17:17, 14 December 2022

2022-12-14T17:17:43Z

← Older revision		Revision as of 17:17, 14 December 2022
Line 3:		Line 3:
	[[Category:Global Stability of a Dam]]		[[Category:Global Stability of a Dam]]
	----		----
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses."		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses." <ref name="Small Dams">[[Design of Small Dams\| Design of Small Dams (United States Bureau of Reclamation, 1987)]]</ref>

	<code>==hello==</code>		<code>==hello==</code>

Grichards at 17:15, 14 December 2022

2022-12-14T17:15:33Z

← Older revision		Revision as of 17:15, 14 December 2022
Line 5:		Line 5:
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses."		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses."

	<code>==hello==<code>		<code>==hello==</code>
	==hello==		==hello==
	The analysis for determination		The analysis for determination

Grichards at 17:14, 14 December 2022

2022-12-14T17:14:53Z

← Older revision		Revision as of 17:14, 14 December 2022
Line 5:		Line 5:
	"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses."		"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis\|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions\|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses."

	<code>==hello==<code/>		<code>==hello==<code>
	==hello==		==hello==
	The analysis for determination		The analysis for determination

Grichards at 17:14, 14 December 2022

2022-12-14T17:14:26Z

@@ Line 3: / Line 3: @@
 [[Category:Global Stability of a Dam]]
 ----
-The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of
+"The factor of safety approach established for sliding and flotation is not appropriate for use in the evaluation of rotational modes of failure. Rotational behavior is evaluated by determining the location of the resultant of all applied forces with respect to the potential failure plane. This location can be determined through [[Static Analysis|static analysis]]. The entire base must be in compression for the usual load condition, to maintain full contact between the structure and the foundation, so there is no chance for higher uplift pressures to develop in a crack. This helps ensure linear behavior for common [[Loading Conditions|loading conditions]]. For the unusual load case, higher uplift pressures may develop in a relatively short crack, but this would cause only minor nonlinear behavior. For extreme load conditions on typical civil works projects, a shear or bearing failure will occur before overturning could occur. Therefore, the resultant is permitted to be anywhere within the base, and safety is ensured by the safety factor requirements for sliding and by the limits on allowable bearing stresses."
 The analysis for determination
 of the resultant location in prior guidance has been termed an overturning [[stability]] analysis. This is a misnomer