分缝结构的非线性响应分析

NONLINEAR RESPONSE ANALYSIS OF JOINTED STRUCTURES

本文给出了模拟结构分缝张开和闭合的有限元模型，该模型可以模拟缝面初始压力、抗拉强度的影响，且具有形成方便，适用范围广等优点；文中导出了非线性有限元的计算公式，编制了相应的非线性有限元程序，并对两个块体接触问题和一个分缝拱肋结构的非线性动力响应进行了计算，研究了不同接缝参数、不同初始压力及基座是否设缝对结构非线性响应的影响，给出了有关结论。

A finite element model for simulating the opening and closing of joints in jointed structures is presented in this paper. The initial pressure and resistance to the tensile strengh at the interface are considered. It can be formed easily and used widely.Some nonlinear finite element formulas are carried out, and corresponding nonlinear finite element programme is compiled. A contact problem of two contact blocks and nonlinear dynamic response of a plane arch are calculated, different jointed parameters, initial pressure and whether having joints or not between the structure and foundation are considered, Some conclusions are given.