楼板局部设缝框架的柱端弯矩增大系数可靠指标分析  

Reliable indicator analysis of CMAF considering the frame with local gaps in slabs

作　　者：朱宏锋 何勇毅 黄珊珊 张敏[4] Zhu Hongfeng;He Yongyi;Huang Shanshan;Zhang Min(Qingyuan Construction Engineering Comprehensive Service Station,Qingyuan Talent Reserve Center,Qingyuan 511500,China;School of Civil Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China;Guangdong Provincial Academy of Building Research Group Co.Ltd,Guangzhou 510000,China;School of Civil Engineering,Jiangxi Science and Technology Normal University f Nanchang 330000,China)

机构地区：[1]清远市建设工程综合服务站,清远市人才储备中心,广东清远511500 [2]广东石油化工学院建筑工程学院,广东茂名525000 [3]广东省建筑科学研究院集团股份有限公司,广东广州510000 [4]江西科技师范大学土木建筑工程学院,江西南昌330000

出　　处：《建筑科学》2020年第3期52-56,共5页Building Science

基　　金：国家自然科学基金资助项目(51368007);广西高校科学技术研究重点项目(2013ZD047)。

摘　　要：本文通过对楼板局部设缝框架的柱端弯矩增大系数可靠指标分析,表明柱端弯矩增大系数ηc随实配系数λs增大而增大,且实配系数λs是框架结构实现"强柱弱梁"最大的制约因素。在λs=1.0时柱端弯矩增大系数ηc=1.6;在λs≤1.1中节点柱端弯矩增大系数ηc≤1.7,边节点下部受拉柱端弯矩增大系数ηc≤2.2;可见,楼板局部设缝框架对框架结构采用现行《建筑抗震设计规范》中的柱端弯矩增大系数有助于实现"强柱弱梁"屈服机制。In this article,the relationship between the reliable indicator of CMAF and the cast-in-place floor slab is analyzed,it is show that the CMAF increases with the increase of actual distribution coefficient,and the real matching coefficient λ is the biggest restriction factor for realizing "strong column and weak beam " in frame structure. When the λs= 1. 0,the CMAF ηc= 1. 6;when the λs≤1. 1,the Interior Joint of CMAF ηc≤1. 7,the side joint of CMAF ηc≤2. 2. So the CMAF of frame for floor slotting is helpful for realizing the yield mechanism of"strong column and weak beam"to adopt the increasing coefficient of column end bending moment in the current"Code for seismic design of buildings"for frame structures.

关 键 词：柱端弯矩增大系数 框架 设缝 强柱弱梁 可靠指标 

分 类 号：TU375.4[建筑科学—结构工程]