高层钢-混凝土混合结构抗震性能分析

目的研究结构的最大位移限值、阻尼比、地震波的输入方向等因素对高层钢-混凝土混合结构抗震性能的影响．方法利用同济大学MTS多高层钢结构设计系统，根据钢-混凝土混合结构抗震概念设计原理建立计算机模型，采用时程分析法进行地震反应分析，计算输入两种地震波时结构最大楼层位移、最大层间位移角沿楼高的分布曲线．结果得到了该建筑物的自振特性，表明结构的最大位移限值、阻尼比、地震波的输入方向等因素对结构的抗震性能均有较大影响．结论笔者的方法分析了对高层钢框架-内混凝土核心筒混合结构体系抗震性能有影响的因素，结构的最大位移限值、阻尼比、地震波的输入方向等因素对高层钢-混凝土混合结构的抗震性能均有较大影响．可以通过设置阻尼器来有效地减小建筑物的地震反应．可为工程实用计算提供可靠的理论依据．

The Analysis and Discussion About the Seismic Behaviors of Tall Steel-Concrete Mixed Buildings

This paper studies the influence of the maximum of the displacement,ratio of traction and the input direction on steel exterior frame concrete interior tube structure.Based on the theory of concept design of steel-concrete hybrid structure and with the help of the MTS system of Tongji University,computer model is established.Moreover,with the time-dependent method,seismic response analysis of a building is carried out to calculate the maximum floor displacement and displacement-angle between floors when two natural earthquake waves are introduced.The relationship between relative storey drifts of steel-concrete mixed building and primary structural parameters is obtained on the basis of statistical investigation into a class of typical structures subjected to various seismic excitations,from which the characteristics of free-vibration are obtained.The results show that the maximum of the displacement,ratio of traction and the input direction have significantly affected the seismic behaviors.The method provided in this paper has discussed the factors,which have influence on steel exterior frame concrete interior tube structure,and it also provides credible technical support to practical approach.