›› 2014, Vol. 35 ›› Issue (11): 3056-3064.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A cyclic constitutive model of saturated dense sands considering fabric change effects

ZHAO Chun-lei1, ZHAO Cheng-gang1, ZHANG Wei-hua1, 2, CAI Guo-qing1   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. City Construction, Beijing City University, Beijing 100086, China
  • Received:2014-01-26 Online:2014-11-11 Published:2014-12-10

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Abstract: To truly describe the reaction of saturated sands under cyclic loading, a parameter considering macroscopically dilatancy stage on fabric changes is necessary. Based on the existing constitutive model dependent on a state parameter, a fabric-dilatancy internal variable z considering the influence of the fabric change is introduced. It is still based on phase transformation state. With state parameter the deformation tendency of sand at any time or any conditions can be judged. Through the z effected on the dilatancy, plastic deformation accumulation is considered when load increment reversals. In this paper, an elastoplastic constitutive model of saturated dense sand under cyclic loading is established. According to experimental phenomenon analysis, plastic modulus in the existing model is modified, it can simulate well expansion shrinkage change process of sands under drained cyclic loading. Finally, in view of the dense sands during triaxial drained cyclic loading, a comparison between model simulations and a sequence of experimental results shows that the model can generally reflect the deformation behavior of being given sand.

Key words: saturated sands, cyclic loading, state parameter, dilatancy, phase transformation line, fabric-dilatancy internal variable

CLC Number: 

  • TU 443
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