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The Static and Dynamical Stability Research of Reinforcement Retaining Wall

Author: BiDongTao
Tutor: ZhuYanPeng
School: Lanzhou University of Technology
Course: Structural Engineering
Keywords: Reinforced retaining wall Stability ADINA Power finite element analysis Fracture surface
CLC: TU476.4
Type: Master's thesis
Year: 2011
Downloads: 120
Quote: 0
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Abstract


The reinforced retaining wall is a kind of structure constructed with reinforcement technology. As the reinforced retaining wall has good resistance to deformation and earthquakes, it is widely used in the construction of roads and bridges in China. Despite the widespread use, its design theories are not mature, especially in dynamical stability and dynamic design.The present study explores some problems existing in the research of dynamic stability of reinforced retaining walls. Accordingly the contents of this paper are as follows:(1)A comprehensive analysis about the state of the field at home and abroad is made to have a sound understanding of the work mechanism of the reinforced retaining wall and keep abreast of the current development in the field of dynamic stability analysis of reinforced retaining walls. In addition, the possible destruction patterns and computing methods of the reinforced retaining wall are analyzed and summarized.(2) The present study conducts an analytical study on the stability of reinforced retaining walls. In this study, a dynamic stability computational model is modified. Based on this computational model, the numerical analysis method of the critical jitter pattern is utilized to search for the positions of the most dangerous glide center of circle and the circular arc of the reinforced retaining wall, and evaluate the dynamic stability of the reinforced retaining wall, thus improving the computing methods of the reinforced retaining wall.(3)The equivalent plastic strain, the horizontal displacement and the distribution law of the wall plate’s deformation are investigated by ADINA. In order to guarantee the calculation accuracy, the quadrangular unit with 4 nodes in the program is applied to analyze the stability of the retaining wall.The result shows that the reinforcement can obviously improve the working performance of the soil slope, make the horizontal displacement coordinated, and significantly improve the stability of the reinforced retaining wall.(4)The large-scale general finite element analysis software—ADINA is utilized to establish a misalignment finite element model of reinforced retaining wall, which consists of the soil body unit, the kneading board unit and the muscle material unit, and conduct a power finite element numerical simulation, thereby doing theoretical analysis of the dynamical stability of the reinforcement wall. Through the numerical simulation analysis, the variation rules of the shape and position of the fracture surface are elicited. Based on the analysis, the present study also analyzed the wall displacement, the deformation of the panel and the change of the pulling force of the muscle material of the reinforced retaining wall under power. Besides, on the basis of the analysis of the computing results, the present study draws some meaningful conclusions on the potiential fracture surfaces of the reinforced retaining wall.To sum up, this thesis mainly studies the dynamical stability of the reinforced retaining wall under earthquakes. Through the analysis, the changes of the dynamic stability of the reinforced retaining wall are obtained, thus supplementing the calculation of the dynamical stability design of the reinforced retaining wall.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > The basis of the special form > Retaining wall
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