The Stability Reliability Analysis about Gravity Retaining Wall

2011 ◽  
Vol 250-253 ◽  
pp. 2352-2355
Author(s):  
Hong Mei Yang
Keyword(s):  
Reliability Analysis ◽  
Collocation Method ◽  
Retaining Wall ◽  
Second Order ◽  
Order Moment ◽  
Computation Method ◽  
Analysis Model ◽  
Safety Coefficient ◽  
Gravity Retaining Wall ◽  
The Stability

The computation method of retaining wall reliability indexes is intruduced, and the analysis model of gravity retaining wall reliability is established in this paper. And the reliability of gravity retaining wall reliability is analyzeda using the center collocation method of second order moment. Based on the comparison of the calculation result of safety coefficient method and that of reliability analysis method, the safety factor method can't correctly reflect the reliability of gravity retaining wall, but the center collocation method of second order moment can correctly reflect the reliability of gravity retaining wall.

A FEEDBACK CONTROL STRATEGY FOR AIRFOIL FLUTTER UNDER RANDOM EXCITATION

2013 ◽  
Vol 12 (03) ◽  
pp. 1350013
Author(s):  
YONG HUANG ◽  
GANG TAO
Keyword(s):  
Feedback Control ◽  
Original System ◽  
Random Excitation ◽  
Second Order ◽  
Order Moment ◽  
Control Parameters ◽  
Flutter Suppression ◽  
The Stability ◽  
Feedback Control Strategy ◽  
Stochastic Controller

In this paper, a study was conducted regarding the stability of a binary airfoil under stochastic disturbances with feedback control. A new stochastic controller has been developed and investigated via Monte Carlo simulation. In order to design the new controller, the original system is transformed to the second-order moment one. Then the optimal control parameters can be obtained by searching for the effectual control parameters in the second-order moment system. Finally, the numerical simulations are included to visualize the good performances in flutter suppression.

Seismic Strengthening Methods and Analysis of Instability of Gravity Retaining Walls

2014 ◽  
Vol 971-973 ◽  
pp. 2141-2146
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu
Keyword(s):  
Safety Factor ◽  
Limit Equilibrium ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Retaining Walls ◽  
Theoretical Formula ◽  
Seismic Strengthening ◽  
Gravity Retaining Wall ◽  
Overturning Stability ◽  
The Stability

Using the frame supporting structure of pre-stressed anchor bolt seismic strengthening technology reinforced the instability of gravity retaining wall. Earth pressure of retaining wall in seismic reinforcement after shall take between active and static earth pressure for the form of the distribution . In this paper, based on the limit equilibrium theory, and the whole stability for retaining walls is analysis, the theoretical formula of the stability safety factor between stability against slope and overturning safety factor is derived. By calculation and comparative analysis with an example, the stability safety factor of gravity retaining wall with introducing this strengthening technology is improved obviously. Keywords: frame anchor structure; seismic strengthening; anti-slip and anti-overturning; stability coefficient;

Reliability analysis of the anti-sliding of a retaining wall subjected to seismic loads

2021 ◽  
pp. 1748006X2096428
Author(s):  
Xiao-Cheng Huang ◽  
Xiao-Di Xu ◽  
Qiu-Nan Chen ◽  
Yun-Fu Liu
Keyword(s):  
Reliability Analysis ◽  
Spatial Correlation ◽  
Retaining Wall ◽  
Friction Angle ◽  
Numerical Results ◽  
Seismic Loads ◽  
Full Agreement ◽  
Reliability Based Design ◽  
Complementary Role ◽  
The Stability

Geotechnical engineering involves various types of uncertainties, as it always deals with highly variable natural materials. Reliability-based design/analysis can play at least a complementary role in the design approach. In this paper, reliability analysis of anti-sliding of retaining wall with the parameters treated as random variables is performed based on the concept of random fields. Both friction angle and cohesion of soils near the interface along the base of retaining wall are treated as Gaussian fields. The spatial correlation and cross correlation of the variables are calculated by a specific covariance function and the seismic loads act on retaining walls are also taken into account. Examples are illustrated to verify the accuracy of the proposed approach. It is found from the numerical results that the spatial correlation of shear strength has an important influence on the probability of the anti-sliding failure of retaining wall. Moreover, the numerical results obtained from the proposed method are in full agreement with those obtained from Monte Carlo simulations. Therefore, the proposed method provides a new view to study the stability of a retaining wall subjected to seismic loads.

Study on Lateral Earth Pressure of Anchored Retaining Wall

2013 ◽  
Vol 353-356 ◽  
pp. 312-317
Author(s):  
Ying Yong Li ◽  
Li Zhi Zheng ◽  
Hong Bo Zhang ◽  
Xiu Guang Song ◽  
Zhi Chao Xue
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Model Test ◽  
Retaining Wall ◽  
Field Tests ◽  
Earth Pressure ◽  
Soil Pressure ◽  
Gravity Retaining Wall ◽  
Lateral Earth Pressure ◽  
The Stability

In order to ensure the security of gravity retaining wall in the high fill subgrade, the design of gravity retaining wall with anchors is proposed,the characteristic of the new wall is that comment anchors are added to the traditional gravity retaining wall,by friction anchors provide lateral pull to the wall so the stability of the new wall is improved. Because of the constraints of anchors, the lateral free deformation is influenced and the soil pressure distribution is very complicated, field tests showed that soil pressure distribution is nonlinear and pressure concentrate in anchoring position. In order to reveal the supporting mechanism of retaining wall and propose the soil pressure formula, the model test of anchor retaining wall is made and numerical simulation is done. The results show that soil pressure appears incresent above the anchor and decreasing below the anchor, the soil pressre also grew larger away from the anchor proximal in the horizontal direction.

A New Reliability Analysis Mehthod of Karst Roof Under Pile Tip

2011 ◽  
Vol 90-93 ◽  
pp. 133-136
Author(s):  
Chong Jiang ◽  
Xi Bing Li ◽  
Ke Ping Zhou ◽  
Shan Wei Wang
Keyword(s):  
Reliability Analysis ◽  
Limit Equilibrium ◽  
Case Analysis ◽  
Equilibrium Analysis ◽  
Analysis Method ◽  
Analysis Model ◽  
Interval Numbers ◽  
Limit Equilibrium Analysis ◽  
Performance Function ◽  
The Stability

There is uncertainty during analysis the stability of karst roof under pile tip. The interval numbers are used to express the calculation parameters. Secondly, the limit equilibrium analysis model of karst roof under pile tip is presented based on the present study. Thirdly, the performance function is suggested to evaluate the reliability of the stability of karst roof under pile tip. The non-probabilistic reliability analysis method for stability of karst roof under pile tip is finally founded. This method is proved to be rational and feasible by engineering case analysis.

Reliability Analysis on Stability of Retaining Wall

2011 ◽  
Vol 368-373 ◽  
pp. 1213-1216
Author(s):  
Qing Guo Li
Keyword(s):  
Reliability Analysis ◽  
Reliability Index ◽  
Retaining Wall ◽  
Reference Value ◽  
Calculation Model ◽  
Wall Structure ◽  
Structure Reliability ◽  
Reliability Calculation ◽  
Geotechnical Mechanics ◽  
The Stability

The retaining wall structure reliability calculation model was established by identifying the stability reliability analysis function of retaining wall according to the geotechnical mechanics parameters’ interval characteristic. The method in this paper has been applied to the engineering examples, the results shows it is reasonable and practicable. The influence of geotechnical mechanics parameters on the retaining wall stability reliability index that was discussed in this paper has a certain reference value for engineering.

scholarly journals Reliability analysis for stability of the gravity retaining wall under mountain torrent

2020 ◽  
Vol 8 (1) ◽  
pp. 434-440
Author(s):  
He Wang ◽  
Hongkai Chen ◽  
Yali Wang ◽  
Linfeng Han ◽  
Haizhan Li
Keyword(s):  
Reliability Analysis ◽  
Retaining Wall ◽  
Gravity Retaining Wall

Structural Reliability Analysis of Loading Platform Cantilever under Multiple Failure Modes

2010 ◽  
Vol 102-104 ◽  
pp. 204-209 ◽  
Author(s):  
Rui Jun Zhang ◽  
Min Li ◽  
Min Qin Zhang ◽  
Xiao Wei Wang
Keyword(s):  
Reliability Analysis ◽  
Structural Reliability ◽  
Failure Modes ◽  
Load Capacity ◽  
Limit State ◽  
Second Order ◽  
Main Beam ◽  
Order Moment ◽  
Reliability Model ◽  
Multiple Failure Modes

Force behaviors of the loading platform of rotating stereo garages is analyzed, equations describing the load capacity and the deformation limit state are proposed for the key sections by applying the second-order moment into the reliability analysis of the main beam. Considering random parameters subject to normal distribution, a reliability model of the main beam of the loading platform is set up based on multiple failure modes and the reliability is analyzed and calculated by using second-order moment. Simulation results show that the reliability model is significant to guide designing on the reliability of rotating stereo garages and improves rotating stereo garages.

scholarly journals Factor Affecting the Magnitude and the Direction of the Pressure Exerted on the Gravity Retaining Wall

2020 ◽  
Vol 9 (5) ◽  
pp. 1340-1343
Keyword(s):  
Water Table ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Soil Pressure ◽  
Gravity Retaining Wall ◽  
The Earth ◽  
Backfill Soil ◽  
Dry Soil ◽  
The Stability ◽  
External Loads

Gravity retaining wall are structures used to retain the soil by its weight .the stability of such type of walls depend on the magnitude and direction of the horizontal forces exerted by soil . it found that there is many factors affect the value and the acting point of acting. Based on this, a study was conducted to investigate the effect of water table, external vertical loads, sloping of the backfill and the type of the backfill soil. It show that, the value of the horizontal soil pressure increase from147KN/m' on dry soil to about 307 KN/m' as the soil become saturated.also,effect of external loads are studied , and show its increase the total horizontal forces of the soil pressure. Sloping the backfill soil behind the retaining wall also great effect on the earth pressure. The type of the backfill soil behind the retaining wall also investigated and found its effect of the earth forces.

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