Effect of strong aftershocks on nonlinear dynamic response of mainshock-damaged concrete gravity dams

被引：0

作者：

Wang G. ^{[1
,2
]}

Lu W. ^{[1
]}

Yan P. ^{[1
]}

Chen M. ^{[1
]}

机构：

[1] State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan

[2] State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing

来源：

| 1600年 / International Research and Training Center on Erosion and Sedimentation and China Water and Power Press卷 / 48期

关键词：

Accumulated damage; Aftershock; Concrete gravity dam; Dynamic response; Mainshock-after-shock seismic sequences;

D O I：

10.13243/j.cnki.slxb.20160915

中图分类号：

学科分类号：

摘要：

Damages of earthquakes in the past indicate that a large mainshock usually triggers numerous aftershocks within a short period, and large aftershocks have a potential to cause additional damage to structures. A Concrete Damaged Plasticity (CDP) model including the strain hardening or softening behavior is presented for the concrete material. Moreover, the interaction between the impounded water and the dam-foundation system is taken into account by the Lagrangian formulation. The validity of the coupling model is verified. The effects of single mainshocks, single aftershocks and mainshock-aftershock seismic sequences on the accumulate damage of concrete gravity dams are presented. The impacts of strong aftershocks on nonlinear dynamic response behavior of the mainshock-damaged dam are discussed in terms of the damage, displacement, and damage dissipation energy. The results show that mainshock-aftershocks seismic sequences have a significant impact on the accumulated damage of the concrete gravity dam. It is necessary to raise the level of anti-seismic property for large dams, to which more attention should be paid in aseismic design of the dam. © 2017, China Water Power Press. All right reserved.

引用

页码：661 / 669

页数：8

共 14 条

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