摘要
根据混凝土动力抗拉抗压试验成果和一致黏塑性模型的概念,考虑应变率和静水压力的影响,将混凝土静态HTC四参数模型改造成一致黏塑性HTC四参数本构模型,并用这个模型对某高拱坝进行了非线性地震反应分析,并与线弹性模型和率无关HTC四参数模型的结果进行比较,探讨应变率对拱坝地震反应的影响,结果表明考虑应变率的影响后,拱坝的应力和塑性应变都发生了较大的变化。
According to the results of dynamic tensile and compressive experiments of concrete and the concept of consistency viscoplastic constitutive model, a modified consistency viscoplastic HTC four- parameter model is developed to take into consideration the effects of strain rate and hydrostatic pressure. Nonlinear seismic responses of a high arch dam are analyzed with this model, and the calculated results are compared with those of linear elastic model and rate- independent HTC four - parameter model, to study the effects of strain rate on seismic response of arch dams. Results show that stress and plastic strain of the arch dam change greatly when the effect of strain rate is taken into account.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第8期5-9,127,共6页
China Civil Engineering Journal
基金
国家自然科学基金资助项目(50139010和50408030)
关键词
拱坝
应变率
动态本构模型
地震反应
塑性应变
arch dam
strain rate
dynamic constitutive model
seismic response
plastic strain
