Shear strength reduction of trapezoidal corrugated steel plates with artificial corrosion pits

2021 ◽  
Vol 180 ◽  
pp. 106583
Author(s):  
Wei Xing ◽  
Li Gang ◽  
Xiao Lin ◽  
Zhou Linjun ◽  
He Ke ◽  
...  
Keyword(s):  
Shear Strength ◽  
Strength Reduction ◽  
Steel Plates ◽  
Corrosion Pits ◽  
Shear Strength Reduction

Slope Stability Analysis under the Condition of Seepage

2012 ◽  
Vol 204-208 ◽  
pp. 241-245
Author(s):  
Yang Jin
Keyword(s):  
Finite Element Method ◽  
Shear Strength ◽  
Slope Stability ◽  
Negative Impact ◽  
Strength Reduction ◽  
Soil Slope ◽  
Failure State ◽  
Calculation Results ◽  
The Stability ◽  
Shear Strength Reduction

The stability of soil slope under seepage is calculated and analyzed by using finite element method based on the technique of shear strength reduction. When the condition of seepage or not is considered respectively, the critical failure state of slopes and corresponding safety coefficients can be determined by the numerical analysis and calculation. Besides, through analyzing and comparing the calculation results, it shows that seepage has a negative impact on slope stability.

Discussion of Criteria of Shear Strength Reduction FEM

2011 ◽  
Vol 243-249 ◽  
pp. 1279-1282
Author(s):  
Li Hong Chen ◽  
Shu Yu ◽  
Hong Tao Zhang
Keyword(s):  
Shear Strength ◽  
Complex Geometry ◽  
Strength Reduction ◽  
Nonlinear Material ◽  
Elastoplastic Model ◽  
Material Models ◽  
Main Technique ◽  
Failure Point ◽  
Straight Lines ◽  
Shear Strength Reduction

Shear strength reduction finite element method (SSRFEM) has been a main technique for stability analysis of slope. Although SSRFEM has advantages to deal with complex geometry and nonlinear material, the criteria for failure is still argued. Ideal elastoplastic model and rheological model were both adopted, and the results of computation showed that using the intersection of two straight lines as failure point was more appropriate. The usage and advantage of two different material models was compared.

Stability Analyses of the Three Gorges Dam Foundation against Sliding by Strength Reduction of Finite Elements

2007 ◽  
Vol 340-341 ◽  
pp. 1315-1320 ◽  
Author(s):  
Ming Xun Hou ◽  
Xiu Run Ge
Keyword(s):  
Finite Element ◽  
Shear Strength ◽  
Strength Reduction ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
Dam Foundation ◽  
The Three Gorges ◽  
Weak Structure ◽  
The Three Gorges Dam ◽  
Shear Strength Reduction

This paper studies the dam foundation stability of the representative no. 3 powerhouse-dam section of the Three Gorges Dam (TGD), China, using elastic-plastic finite element shear strength reduction technique. In the no. 3 powerhouse-dam section area, the low-angle discontinuities, such as joints and faults, are mostly developed in the dam foundation rock mass, and constitute deep foundation stability problems. These weak structure planes affecting the dam foundation stability are modeled as continuum bodies in the finite element modeling according to their respective spatial geometrical characteristics including inclination and dip angle. Three-dimensional elastic-plastic finite element analyses are performed to obtain the stress and deformation distributions of TGD foundation and concrete structures. The factor of safety (FOS) of TGD foundation stability against sliding and its failure mechanics are comprehensively evaluated with the following criteria: (a) The maximum of the trial factors of shear strength reduction can be reached by which the dam foundation is brought to the critical equilibrium state; (b) The inflection points of the curves of the displacements of dam heel, dam toe and dam top, vs. the trial factors of shear strength reduction are located; and (c) Plastic zones develop along the potential sliding paths consisting of the dam heel, long and large joints, and other weak structure planes as the trial factors increase. The results obtained show that the dam foundation of the no. 3 powerhouse-dam section is stable under the designed normal load combinations. The evaluations of the FOS of dam foundation stability presented may provide a significant reference for the safety assessment of TGD in the Three Gorges Project, China.

Effect of Bracing Elements on Mechanics and Shear Strength of Exterior Beam-Column Joints in Moment Resisting Frames

2013 ◽  
Vol 343 ◽  
pp. 15-19
Author(s):  
G. Appa Rao ◽  
S. Kanaka Durga
Keyword(s):  
Shear Strength ◽  
Strength Reduction ◽  
Beam Length ◽  
Optimum Location ◽  
Joint Shear Strength ◽  
Moment Resisting Frames ◽  
Moment Resisting Frame ◽  
Moment Resisting ◽  
Column Joint ◽  
Shear Strength Reduction

Beam-column joint in moment resisting frames is very crucial particularly for non-seismically designed cases, which requires strengthening by various methods. This paper reports on shear strength reduction in exterior beam-column joints using haunch elements. Numerical analysis has been performed on exterior beam-column joint of moment resisting frame with and without a haunch element using SAP software. A parametric study has been performed for optimum haunch location (L) along the beam length (Lb) (10%, 12.5%, 15%, 20%, 25%, 40% and 50% of Lb) and the angle of the haunch element along column axis (15°, 30°, 45° and 60°). It has been observed that the optimum location of the haunch element is at 0.2Lb along the beam at an inclination of 45° with the column axis. The analysis results show that the addition of haunch element significantly reduced the joint shear strength.

Stability Analysis of Jointed Rock Slope Using Shear Strength Reduction Approach

2013 ◽  
Vol 423-426 ◽  
pp. 1321-1324 ◽  
Author(s):  
Li Juan Cao ◽  
Yu Ning Liu ◽  
Zi Chang Shangguan
Keyword(s):  
Shear Strength ◽  
Fracture Criterion ◽  
Rock Slope ◽  
Jointed Rock ◽  
Strength Reduction ◽  
Collapse State ◽  
The Stability ◽  
Jointed Rock Slope ◽  
Shear Strength Reduction ◽  
Reduction Approach

Finite element method is used to compute the factor of safety of jointed rock slope. The stability of jointed rock slope is simulated by using shear strength reduction approach. Mohr-Coulomb fracture criterion is used to evaluate the sticking or sliding state of jointed rock mass. The distribution of plastic zone at collapse state is determined. Numerical computational results show that the proposed procedure is effective to evaluate stability of jointed rock slope.

An Approach for Landslide Stability Evaluation by Numerical Method

2011 ◽  
Vol 462-463 ◽  
pp. 42-47
Author(s):  
Xiao Li Liu ◽  
Jun Jie Yang
Keyword(s):  
Shear Strength ◽  
Plastic Zone ◽  
Numerical Method ◽  
Critical State ◽  
Slip Surface ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Strength Reduction ◽  
Landslide Stability ◽  
Shear Strength Reduction

For numerical simulation, the shear strength reduction technique (SSRT) is often used to evaluate slope or landslide stability. According to numerical computation results of slopes or landslides analyzed by SSRT, it can be found that with increase of the shear strength reduction factor, some of the soil elements will yield gradually to form a connected plastic zone, which is the potential slip surface of the slope or landslide. In view of the plastic resistance of soils, formation of the connected plastic zone does not always indicate that the landslide is about to failure. Other auxiliary criterion is necessary to predict whether a slope or landslide is in a critical state or not. Here, difference of the incremental percent of horizontal displacement of the outcropping slip surface node is regarded as the auxiliary indicator to distinguish the critical state of slopes or landslides after formation of the potential slip surface. With the ideas mentioned above, stability of a fossil landslide, Xietan landslide has been analyzed for the natural and the long-term reservoir water level conditions. Factors of safety of Xietan landslide by the numerical method have been compared with that by the limit equilibrium method, which indicates that the method used here for evaluating stability of Xietan landslide is feasible. Because numerical method has more advantages over the limit equilibrium method, the approach for evaluating stability of landslide here can be applied to more complicated or three-dimensional landslides or slopes further.

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