某平板结构现场加载试验及有限元分析
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陈庆军1,2，蔡健1,2，王英涛1，张增球1，谢小东1，陈星3，苏恒强3(1 华南理工大学土木与交通学院， 广州 510641； 2 亚热带建筑科学国家重点试验室， 广州 510641；3 广东省建筑设计研究院， 广州 510010)［摘要］广州某核心筒板柱结构工程中的板柱节点内埋型钢架。为检验该板柱结构的静载承载能力、变形能力及其他受力性能，采用现场加载测试及有限元分析进行了研究。试验采用分十级将加气混凝土砌块堆加到2m高的加载方法，采集楼板在各级检验荷载作用下的挠度及混凝土的应变情况。试验结果表明，在试验荷载达到设计荷载标准组合(7kN/m2)时，结构未出现可见裂缝，结构位移及应变均处于线弹性阶段；在试验荷载达到荷载标准组合2倍(14kN/m2)时，出现了少量裂缝。采用ABAQUS软件进行了有限元分析，其中楼板采用了分层壳单元。试验结果与有限元分析结果吻合良好，有限元分析得到的极限承载力要远高于结构的试验荷载，表明了本结构具有较高的安全度。分析也表明节点区内置的型钢架除了原设计设想中的提高抗冲切、抗剪能力外，其在抗弯方面也起到了明显的作用。［关键词］平板结构； 现场加载； 试验研究； 有限元分析； ABAQUS中图分类号：TU398，TU52859文献标识码：A文章编号：1002848X(2013)12003306Onsite loading experiment and finite element analysis on a flat slab structureChen Qingjun1,2, Cai Jian1,2, Wang Yingtao1, Zhang Zengqiu1, Xie Xiaodong1,Chen Xing3, Su Hengqiang3(1 School of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China;2 State Key Laboratory of Subtropical Building Science, Guangzhou 510641, China;3 The Architectural Design & Research Institute of Guangdong Province, Guangzhou 510010, China.)Abstract:For testing the static load carrying capacity, deformation capacity, and other mechanical behavior of a structure in Guangzhou, which is a coretubeflatslab structure, section steel shelf embedded in joint zone, the onsite loading experiment and finite element analysis were carried out. The testing load, which was loaded by aerated concrete bricks to 2m height, was divided into ten steps. In each testing load step, the deflection and concrete strain were collected. The experiment results show that, when the testing load increases to standard combination design load (7kN/m2), the structure does not appear visible cracks and the structural displacement and strain are still in linear elastic stage, when the testing load achieves 2 times of standard combination load (14kN/m2), only a small amount of cracks appear. Finite element analysis software ABAQUS was used for further study, in which layered shells were used for floors. Experimental results and finite element analysis results agree well, and the ultimate bearing capacity of the finite element analysis is much higher than testing load, indicating that this structure has a higher level of security. Analysis also indicates that, in addition to the original design idea of improving punching and shearing ability of the joint zone, the builtin section steel shelf also plays significant roles in the bending capability of the joint.Keywords:flat slab structure; onsite loading; experiment study; finite element analysis; ABAQUS*广东省自然科学基金资助项目(9451064101002910)，中央高校基本科研业务费专项资金资助项目(2011ZM0112)，华南理工大学亚热带建筑科学国家重点实验室自主研究课题项目（2013ZC19）。作者简介：陈庆军，博士，副教授，Email: qjchen@scut.edu.cn。参考文献［1］陈庆军, 凌育洪, 钟国坤, 等. 某带多层地下室的预应力板柱抗震墙结构工程设计［J］. 昆明理工大学学报：理工版, 2010,35(3):4549.［2］徐坚. 新型梁柱板柱组合结构楼盖设计方法的研究［D］.南京：东南大学，2003.［3］蒋永生, 梁书亭, 陈德文,等. 新型梁柱板柱组合结构（住宅）体系的试验研究［J］. 土木工程学报，2005,38(10):513.［4］GROSSMAN JACOB S.Verification of proposed design methodologies for effective width of slabs in slabcolumn frames［J］.ACI Structural Journal, 1997, 94(2):181196.［5］黄成若，韩福田， 肖勇，等. 无梁楼盖的试验研究及设计方法［J］. 建筑科学, 1993(2):1726.［6］MORRISON D G, HIRASAWA I, SOZEN M A. Lateralload tests of RC slabcolumn connections［J］. Journal of Structural Engineering, ASCE,1983,109(11):26982714.［7］蔡健, 李光星, 李景,等. 无粘结预应力混凝土平板T形中柱节点抗震性能的试验研究与承载力分析［J］. 建筑结构学报， 2004,25(6):3743.［8］李光星, 蔡健, 陈加猛, 等. 无粘结预应力混凝土平板T形柱节点冲切性能试验研究［J］. 东南大学学报：自然科学版， 2005,35(4): 563568.［9］CAI JIAN, LI GUANGXING, YANG CHUN,et al. Tests on unbonded posttensioned concrete flat plate with Tshaped column conections［J］. Advances in Structural Engineering (An International Joural), 2006,9(5):671686.［10］刘付均, 蔡健, 张学文,等. 新型钢管混凝土柱平板节点轴压性能的研究（Ⅰ）——试验概况及结果分析［J］. 华南理工大学学报， 2003,31(3):7780.［11］刘文，姚谦峰. 垂直荷载作用下板柱结构计算方法的比较与分析［J］. 建筑结构, 2009,39(8):5659,55.
