诱导缝超级子结构数值计算模型

Numerical calculation model of crack director substructure

在一套有限元计算网络中协调大范围坝体及坝肩(基)岩体与局部小尺寸诱导缝结构的矛盾存在困难,常规的有限元分析中一般采用折减RCC变形和强度参数来反映诱导缝面的综合效应,该方法难以准确地反映诱导缝对坝体整体刚度的削弱程度和诱导板之间RCC桥的应力集中. 同时,诱导缝面的综合变形和强度参数确定缺乏相应的试验资料. 为克服上述缺点,结合沙牌RCC拱坝诱导缝结构型式,提出诱导缝超级子结构数值计算模型.

It is difficult to correspond the contradiction between the big size of dam and rock mass and the small size of crack director in the same meshwork of FEM.The general method is to discount the strength parameter of RCC.The method can't accurately reflect the weaken degree of whole stiffness brought by crack director and the stress concentration of RCC bridge between crack director.At the same time,it is not enough trial data to make sure the parameter of crack director strip.This paper brought forward numerical calculation of crack director substructure based on the structural model of crack director in RCC arch dams.