考虑横缝影响的某双曲拱坝动力分析  

Dynamic Analysis of Double Curvature Arch Dam Considering Impact of Transverse Joints

作　　者：陈迪辉[1,2,3] 包腾飞 金盛杰[1,2,3] 钱秋培 CHEN Di-hui;BAO Teng-fei;JIN Sheng-jie;QIAN Qiu-pei(College of Water Conservancy and Hydropower Engineering;State Key I.aboratory of Hydrology--Water Resources and Hydraulic Engineering;National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing 210098, China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [3]河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098

出　　处：《水电能源科学》2018年第4期61-64,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51579086;51479054;51379068;51139001);江苏省杰出青年基金项目(BK20140039);江苏高校优势学科建设工程项目(水利工程)(YS11001)

摘　　要：基于某拱坝有限元模型,采用动接触模型模拟拱坝横缝,分析横缝对拱坝地震响应的影响及动力作用下拱坝横缝的开度。与无横缝模型结果对比分析表明,横缝的存在会使拱坝应力重分布,且其张开可减小拱向应力,同时增加梁向应力。从最大主应力角度考虑,横缝的存在削弱了拱坝的整体性,导致最大主应力增大,但对位移的影响不大;横缝开度较大区域集中在拱冠梁和左右岸坝肩位置,因而横缝影响在拱坝动力分析中不可忽略。Based on one finite element model of arch dam,dynamic contact model was used to simulate transverse joints and analyze the impacts of transverse joints on seismic response of arch dam and the transverse opening of arch dam under dynamic effects.Compared with the results of model without transverse joints,the existence of transverse joints can cause the stress redistribution of arch dam,and the opening of transverse joints can reduce the arch stress and increase the beam stress.Considering from the view of maximum principal stress,transverse joints weaken the integrity of arch dam,which leads to the increase of the maximum principal stress,but the impact on the displacement is not obvious.The area of large transverse opening is concentrated around the arch crown beam and the abutment of the left and right sides.So,the influence of transverse joints can not be ignored in the dynamic analysis of the arch dam.

关 键 词：横缝 拱坝 接触模型 地震响应 

分 类 号：TV624.4[水利工程—水利水电工程]