摘要
住宅型钢筋混凝土巨型框架结构是一种新型的高层住宅结构体系。为研究其抗震性能，进行了节点1／4缩尺模型的拟静力试验。本文介绍了清华大学完成的第三批两个巨型框架节点试件的试验，两个试件的基本破坏形态为巨梁的弯曲破坏。根据试验结果，分析了巨梁在正负两个方向的受力特点。巨梁内力分别采用壁式框架模型的分析方法和极限平衡方法计算，计算结果与试验实测值吻合。试验实测表明小节点区的受力不同于普通框架节点，这是小节点区不易破坏的原因。本文还讨论了钢筋混凝土巨型框架的抗震设计概念，认为巨梁耗能机制不理想。
Reinforced concrete mega-frame is a new structural system for tall residential buildings. Low cycle reversed loading tests of 1/4-scaled beam-column joint specimens were carried out to study the seismic behavior of mega-frame. The main results of tests of two joint specimens conducted in Tsinghua University in China are ieduced in this paper. The two specmens are all failed due to the moment in mega beams. Performances of mega beams under positive and negative loads are studied. The specimens are analyzed using the frame model with rigid zones and the lindt equilibrium method. The analytical results of mega beams have good agreement with the test meults. The experimental nsults show that the intenal foree distributions of small joint regions of mega-frame are different from that of the joint panels of ordinary frame. It is one of the reasons tha small joint regions are not prone to be destroyed. Earthquake resistance design concepts of mega-frame are discussed. It is recognized that the failure of mega beams may not be a proper failure mechanism for RC mega-frames.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第2期13-18,共6页
China Civil Engineering Journal
基金
教育部结构工程与振动开放研究室基金!9601
