【作者】 李亮；

【导师】 朱浮声；

【作者基本信息】 东北大学 ， 结构工程， 2008， 硕士

【摘要】 在1994年美国的北岭地震和1995年日本的阪神地震中,曾经被认为具有良好抗震性能的钢框架的梁柱连接处发现了大量的脆性断裂现象。地震后人们对新型钢框架梁柱连接形式及其对钢框架结构抗震性能的影响和基于性能抗震设计进行了大量研究。弹塑性分析作为结构抗震设计的重要组成部分,以其简单实用的优点已经得到越来越多设计人员的关注,并且已经被列入我国《建筑抗震设计规范》(GB5001-2001),作为结构弹塑性变形分析方法之一。本文分别对普通节点钢框架结构和采用狗骨式节点钢框架结构进行静力弹塑性分析。介绍了静力非线性pushover分析方法的理论及其发展现状,介绍了ETABS进行静力非线性分析的方法。在ETABS建模过程中,对两种框架采用平面杆系模型进行建模。材料非线性采用程序中默认的框架非线性铰来模拟。对两类型节点钢框架分别采用四种加载模式进行静力非线性(pushover)分析,本论文根据pushover分析得到的结构塑性铰分布,可以看出采用狗骨式节点的钢框架结构能够满足“强柱弱梁”的要求；根据pushover分析得到两种结构的底部剪力-顶点位移曲线,对两种结构性能点处的剪力和顶点位移进行对比,可以发现采用狗骨式节点的钢框架结构与普通钢框架相比,在多遇地震下,顶点位移大2%左右,低层剪力小0.5%；在罕遇地震作用下,顶点位移大2.5%左右,低层剪力小4%左右,说明采用狗骨式节点钢框架结构在相同条件下对抗震更加有利。更多还原

【Abstract】 During the 1994 Northridge earthquake and 1995 Kobe earthquake, the typical beam-column moment connection in steel moment-resisting frame suffered unexpected brittle failures. After the earthquake many studies on the behavior of beam-column connections used in steel moment resisting frame and their effect on seismic behavior of steel frames and the studying of performance-based design have been carried out. Elastic-plastic analysis has become an important part of structural seismic design, among which the nonlinear static push-over analysis has attracted the attention of moreand more engineers for its merits of simpleness and practicality. The nonlinear staticanalysis has become one of nonlinear analysis tools of Chinese seismic code.This paper presents a static elastic-plastic analysis between the behavior of single normal steel beam-column connection and that of single dog-bone connection. Introduced the theory of nonlinear pushover analysis and the method that ETABS carries on it.At the process of modeling, introduced the plane bacilliform model and the frame nonlinear hinge for defining material nonlinear.Introduced four loading pattern for pushover analysis.According to the plastic hinge distribution which was obtained from the nonlinear pushover analysis, the steel frames with dog-bone connection satisfied the "stronger column weaker beam". According to the base shear-top displacement at performance point of these two structures, the top displacement of the steel frame with dog-bone connections is 2% larger than that of normal steel frame but the base shear is 0.5% smaller than that of normal steel frame at basic earthquake and the top displacement of the steel frame with dog-bone connections is 2.5% larger than that of normal steel frame but the base shear is 4% smaller than that of normal steel frame at maximam earthquake.It’s proved that the steel frame with dog-bone connection is better for resist earthquake at same conditions.更多还原