钢-混凝土组合梁非线性分析概述

Non-linear analysis of steel-concrete composite beams

对钢-混凝土组合梁非线性分析过程中的关键问题进行了分析,这些问题主要包括:混凝土本构关系模型的选用;混凝土的开裂模式及开裂后性能;钢和混凝土之间连接滑移的处理方法等。阐述了分段杆单元法、分层法、平面应力法等常用分析模型及其优缺点。最后,给出了组合梁非线性分析数值实现方法的几点建议。

More and more composite beams have been used more and more with the development of high-rise buildings.Some non-linear analysis has beeen made of steel-concrete composite beams by us-ing finite element method to cover the following aspects:selection of concrete failure models;cracking model and after-cracking properties of concrete and finite element models suitable for analysis.Different constitutive relationship and popular models with their advantages and shortcomings are expounded.At last,several suggestions have been made with respect to the process of non-linear analysis.