水利学报2017，Vol.48Issue(6)：661-669,9.DOI:10.13243/j.cnki.slxb.20160915
强余震对主震受损重力坝非线性动态响应的影响
Effect of strong aftershocks on nonlinear dynamic response of mainshock-damaged concrete gravity dams
摘要
Abstract
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.关键词
混凝土重力坝/余震/损伤累积/动态响应/主余震序列Key words
concrete gravity dam/aftershock/accumulated damage/dynamic response/mainshock-after-shock seismic sequences分类
建筑与水利引用本文复制引用
王高辉,卢文波,严鹏,陈明..强余震对主震受损重力坝非线性动态响应的影响[J].水利学报,2017,48(6):661-669,9.基金项目
国家自然科学基金项目(51509189) （51509189）
流域水循环模拟与调控国家重点实验室开放基金项目(IWHR-SKL-201611) （IWHR-SKL-201611）
中国博士后基金项目(2016T90728) （2016T90728）
长江科学院开放研究基金项目(CKWV2016383/KY) （CKWV2016383/KY）
