高拱坝地震响应时程分析
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摘要
采用有限元结合三维粘弹性局部人工边界的动接触地震波动模拟方法建立拱坝-地基-库水的有限元计算模型,研究库水对结构振动频率和振型的影响。并借助APDL语言实现粘弹性人工边界、动水压力及地震波的自动输入模块,对拱坝-地基-库水联合作用下的结构进行抗震计算时程分析。计算结果为优化坝体结构的动力特性和抗震设计提供参考。
In this paper,combining finite element with 3-D viscoelastic local artificial boundary of the dynamic contact seismic wave simulation methods,established the finite element model of arch dam-foundation-water to study the impact of reservior water on vibration frequency and vibration mode.The viscous-spring artificial boundaries,hydrodynamic pressure and seismic wave can be automaticly input by APDL Language.The time history analysis method is used to calculate and analyze the dynamic response of structures under combined effect of dam body,foundation and reservoir water.The research results can be supplied the theory reference for the optimization of the dam structure.
In this paper,combining finite element with 3-D viscoelastic local artificial boundary of the dynamic contact seismic wave simulation methods,established the finite element model of arch dam-foundation-water to study the impact of reservior water on vibration frequency and vibration mode.The viscous-spring artificial boundaries,hydrodynamic pressure and seismic wave can be automaticly input by APDL Language.The time history analysis method is used to calculate and analyze the dynamic response of structures under combined effect of dam body,foundation and reservoir water.The research results can be supplied the theory reference for the optimization of the dam structure.
引文
[1]杜修力,汪进廷.拱坝—可压缩库水—地基地震波动反应分析方法[J].水利学报,2006,37(6):86-90.
[2]陈厚群,李德玉,胡晓,等.有横缝拱坝的非线性动力模型试验和计算分析研究[J].地震工程与工程振动,1995,27(6):40-43.
[3]刘晶波,吕彦东.结构—地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,31(3):55-64.
[4]姜忻良,杨书燕.结构—基础—土—河流相互作用地震反应分析[J].地震工程与工程振动,2006,38(2):138-142.
[2]陈厚群,李德玉,胡晓,等.有横缝拱坝的非线性动力模型试验和计算分析研究[J].地震工程与工程振动,1995,27(6):40-43.
[3]刘晶波,吕彦东.结构—地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,31(3):55-64.
[4]姜忻良,杨书燕.结构—基础—土—河流相互作用地震反应分析[J].地震工程与工程振动,2006,38(2):138-142.
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