›› 2014, Vol. 35 ›› Issue (S2): 613-618.

• Numerical Analysis • Previous Articles     Next Articles

Numerical simulation for direct shear tests with strain softening constitutive contact elements

ZHENG Li-ning1,2，KANG Jing-wen2，XIE Qiang3，CHEN Yun2，LI Ke-yi2，JIA Peng2   

  1. 1. China Construction Underground Space Co., Ltd., Chengdu 610081, China; 2. China Southwest Geotechnical Investigation & Design Institute Co., Ltd., Chengdu 610052, China; 3 School of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2014-06-05 Online:2014-10-31 Published:2014-11-12

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Abstract: Research tools for direct shear of geomaterials contact surfaces with strain softening constitutive characteristics is more limited, based on FLAC, strain softening constitutive contact element models is achieved in this paper. Using this element models, the direct shear tests are simulated; the relationships between the shear strength parameters evolution for contact elements and the formal features of shear stress-displacement curves are deeply studied. The progressive failure process of the contact surfaces and the variation characteristics of the internal shear stress are reproduced in the simulation results. The studies have shown that the variation of the friction angle has a major impact on the formal features of shear stress-displacement curves.

Key words: strain softening, contact, direct shear, numerical simulation

CLC Number: 

  • TU 452
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