XIONG Zhongming,WANG Jingdong,ZHANG Chao,et al.Dynamic Response and Characteristics of the Ground Fissure Site under Earthquake[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):60-68.
XIONG Zhongming,WANG Jingdong,ZHANG Chao,et al.Dynamic Response and Characteristics of the Ground Fissure Site under Earthquake[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):60-68. DOI: 10.13409/j.cnki.jdpme.201912002.
Dynamic Response and Characteristics of the Ground Fissure Site under Earthquake
In order to accurately describe the dynamic characteristics of the ground fissure site, a 3-D dynamic numerical simulation model of the ground fissure site was established with the ABAQUS program. The dynamic response of peak ground acceleration (
PGA
), peak ground velocity (
PGV
), Housner Intensity (
HI
) and Arias Intensity (
I
a
) was obtained under strong earthquake. The validity of the simulation was verified with a shaking table model test. The results show that the dynamic amplification factor and the range of influence of the hanging wall were larger than those of the footwall. The maximum value of the dynamic amplification factor was recorded close to the ground fissure and decreased from the ground fissure to both sides, showing
λ
-shaped. With the increase of seismic intensity, the amplification factor and the difference of dynamic response between the hanging wall and footwall gradually decreased due to the non-linear and softening behavior of the soil. Because the seismic long-period component of the footwall was more abundant, the mean period of the hanging wall was larger than that of the footwall. It was more serious to site damage during an earthquake along the vertical direction of the ground fissure with the same seismic intensity. The results provide references for engineering application of ground fissures sites.
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