摘要
用非线性有限元方法研究了拱坝的非线性地震响应．研究中考虑了坝体、坝基材料，坝体浇筑横缝和预留周边缝等各种非线性的影响．混凝土材料的弹塑性模型考虑了材料的软化、开裂等．坝体和接缝材料的屈服应力和失效应力假定与塑性功的累积有关．用断裂能和等效裂缝应变表征缝面上正应力的变化规律．最后，在时域内对一实际高拱坝进行了数值分析，并给出了主要成果．
Nonlinear Seismic Response of arch dams is studied with nonlinear FEM in this paper.The nonlinearity of materials of the dams and foundations,as well as transverse joints and perimetral joints are discussed.The softening and cracking of the material are considered in the model.Yield stresses and failure stresses are assumed to be related to the amount of plastic energy.Fracture energy and equivalent crack strain are used to represent the laws of normal stress on the crack surface.In the time domain,numerical analysis is performed for a high arch dam and the results are given.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1999年第6期40-43,共4页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金重点项目
关键词
拱坝
非线性
地震响应
塑性功
arch dam
nonlinear seismic response
plastic work
time domain analysis
