›› 2010, Vol. 31 ›› Issue (9): 2913-2918.

• Geotechnical Engineering • Previous Articles     Next Articles

Stability analysis of Xi’an city wall considering nonlinear contact

ZHANG Ke1，WU Min-zhe1，MENG Zhao-bo1，LI Zhi-hong2   

  1. 1. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Institute of Geotechnical Investigation and Design, MMI, Xi’an 710043, China
  • Received:2009-03-23 Online:2010-09-10 Published:2010-09-16

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Abstract:

Xi’an city wall is an artificial loess slope composed of inner-soil and outer-brick masonry. Strength reduction FEM is an effective method for analyzing the slope stability and calculating the safety factor. But when it is applied to analyze the wall’s stability, such difficulties emerge as the potential fracture face in the outer-brick masonry and the interface between inner-soil and outer-brick masonry. According to the contact condition, a plastic interface constitutive equation considering the softening on shear capacity is developed to analyze the stability of Xi’an city wall by using strength reduction FEM. The results indicate that the potential slip circle could be simplified to a line with the vertex 3 m away from the slope shoulder. And the safety factor along this line can meet the engineering requirements of stability. Furthermore, several principal factors that affect the deformation and damage of the wall are determined, such as the shearing strength of outer-brick masonry and the friction coefficient between inner-soil and outer-brick masonry. So it can serve the stability assessment and renovation of the city wall.

Key words: city wall, stability, interface constitutive equation, strength reduction FEM

CLC Number: 

  • TU 435
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