新型钢管柱-H形梁铸钢模块化节点的概念设计与抗震性能评估

发布时间：2018-06-16 04:11

本文选题：铸钢 + 模块化节点　；参考：《振动与冲击》2014年21期

【摘要】：介绍了铸钢件在钢结构体系尤其是梁柱框架中的应用和研究现状。基于利用节点域稳定塑性耗能的理念提出一种适用于方(矩)形钢管柱-H形梁框架连接的铸钢模块化节点型式及其设计方法。对铸钢模块化节点和传统焊接节点进行了单调加载和循环往复加载非线性有限元模拟,并引入断裂指数对节点在塑性大变形条件下发生延性断裂的倾向大小作出评价。从刚度、承载力、延性、耗能能力、耗能机制、塑性变形模式等多角度分析论证了铸钢模块化节点不同于传统焊接节点的性能特点。研究结果表明,新型铸钢模块化节点的抗震性能优于传统焊接节点,可以在不损失延性的情况下充分发挥抗震钢结构体系的耗能能力。
[Abstract]:The application and research status of steel castings in steel structure system, especially in Liang Zhu frame are introduced. Based on the idea of stable plastic energy dissipation in the joint domain, a modular cast steel joint and its design method are proposed, which are suitable for the square (moment) steel tubular column H beam frame connection. The nonlinear finite element simulation of cast steel modular joints and conventional welded joints under monotone loading and cyclic loading is carried out. The fracture index is introduced to evaluate the ductile fracture tendency of joints under the condition of large plastic deformation. From the aspects of stiffness, bearing capacity, ductility, energy dissipation capacity, energy dissipation mechanism and plastic deformation mode, the performance characteristics of cast steel modular joints are analyzed and proved to be different from those of conventional welded joints. The results show that the aseismic performance of the new cast steel modular joints is better than that of the traditional welded joints, and the energy dissipation capacity of the aseismic steel structure system can be brought into full play without the loss of ductility.
【作者单位】：同济大学土木工程防灾国家重点实验室;同济大学建筑工程系;
【基金】：国家自然科学基金重点项目(51038008)
【分类号】：TU391

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