钢筋混凝土框架异型中节点抗裂度计算

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英文篇名：CALCULATION ON CRACK RESISTANCE CAPACITY OF ABNORMAL INTERIOR JOINTS IN REINFORCED CONCRETE FRAME STRUCTURES 中文刊名：工业建筑 英文刊名：Industrial Construction 作者：邢国华 ; 吴涛 ; 刘伯权 ; 杨乐 ; 姚显贵 英文作者：Xing Guohua Wu Tao Liu Boquan Yang Le Yao Xiangui(Chang′an University ; Xi′an 710061 ; China) 中文关键词：异型中节点 ; 抗裂承载力 ; 框架 ; 小核心 英文关键词：abnormal interior joint ; crack resistance capacity ; frame ; minor core 出版日期：2009-06-20 机构：长安大学; 年：2009 期：06 出版单位：工业建筑

摘要

基于6个钢筋混凝土框架异型中节点试件的试验研究,分析了节点核心区尺寸、轴压比等因素对异型中节点抗裂性能的影响。结果表明:节点开裂前核心区混凝土基本处于弹性工作阶段,异型中节点的剪力主要由小核心(小梁与上柱构成的区域)混凝土承担,增大轴压比可以提高异型中节点试件的抗裂承载能力。在试验研究的基础上,提出异型中节点抗裂承载力计算公式,并与11个异型节点试件的试验结果进行对比,吻合较好。
Six specimens of abnormal interior joints were tested under reversed cyclic loading.Experimental studies were carried out to investigate the influence of joint core dimensions and axial compression ratio on crack resistance of abnormal joints.The results showed that the crack resistance capacity was mainly provided by the minor core concrete(determined by the top column and the small beam),and the minor core concrete was in elastic stage before cracks appeared.Furthermore,axial compression ratio was a significant parameter to increase the crack resistance capacity.Based on the test results,a theoretical formula of crack resistance capacity was proposed.The calculated crack resistance capacities of 11 abnormal interior joints were compared with the experimental results,and a good agreement was obtained.

引文

[1]GB 50010—2002混凝土结构设计规范[S].
    [2]赵鸿铁.钢筋混凝土梁柱节点的抗裂性[J].建筑结构学报,1990,11(6):38-48.
    [3]白国良,朱佳宁,李红星.钢筋混凝土框架异型节点抗裂计算[J].世界地震工程,2003,19(3):12-16.
    [4]GB 50011—2001建筑抗震设计规范[S].