钢管混凝土叠合柱环梁节点试验研究.doc

文档介绍：
钢管混凝土叠合柱环梁节点试验研究#
周颖1,于海燕1,瞿革2,张录2,陈祎2,胡凯2*
(1. 同济大学土木工程防灾国家重点实验室,上海 200092;
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2. 中船第九设计研究院工程有限公司,上海 200063)
摘要:钢管混凝土叠合柱结构以其较高的承载力、良好的延性和方便的施工,在高层建筑中
越来越受到重视。现有的钢筋混凝土梁叠合柱节点形式,在连接多梁肢时存在诸如严重削弱
钢管整体性等问题。本文提出了一种在梁柱连接处扩大的环梁节点形式。为研究钢管混凝土
叠合柱环梁节点的受力性能,进行了 2 个基准试件的静力试验,同时以径宽比和配筋比为两
个参数变量,进行了 5 个试件的低周反复试验,观测试件的破坏模式、裂缝开展,及节点区
钢筋应力分布。静力试验下试件的承载力均高于设计包络值;低周反复试验下不同参数变量
的试件,呈现出不同的破坏模式,破坏时梁肢的转角值均比较大。结果表明:钢管混凝土叠
合柱环梁节点在概念上是可行的,合理的设计可保证“强节点、弱构件”机制的实现。
关键词:钢管混凝土叠合柱;环梁节点;径宽比;配筋比;静力试验;低周反复试验
中图分类号:TU 973
Experimental Study on Large-Scale Joints of Ring Beams
and RC-CFT Laminated Columns
ZHOU Ying1, YU Haiyan1, QU Ge2, ZHANG Lu2, CHEN Yi2, HU Kai2
(1. State Key Laboratory of Disaster Reduction Civil Engineering, Tongji University, Shanghai
200092;
2. China Shipbuilding NDRI Engineering Co., Ltd, Shanghai 200063)
Abstract: RC-CFT laminated columns structure es more and more popular in high-rise buildings
because of its high capacity, good ductility and easy construction. However, many problems, such as
seriously weakening the integrity of the tube, exist in the existing joints of frame beams and RC-CFT
laminated columns, when columns need to connect multiply frame beam segments. This paper presents
a new type of joints enlarged at the connection between columns and frame beams. To study the
mechanical behavior, two scaled static tests and