砌体结构房屋板-墙约束作用研究

Study on interaction between slabs and walls in masonry structure buildings

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摘要 GB 50003规范采用基于梁-墙模型试验结果的混凝土梁与砌体墙之间相互约束作用的分析方法,对无筋砌体墙进行受压承载力计算。由于墙体内没有内拱作用,且楼板的刚度比梁小很多,有必要研究板-墙相互约束作用。采用经试验结果验证的有限元分析方法,研究了墙顶竖向压应力、板-墙刚度比和支承长度对砌体墙约束弯矩的影响,提出了基于框架结构计算简图的弯矩修正系数的砌体墙设计方法,并将该方法的计算结果与GB 50003规范、EC6规范的计算结果进行了对比分析。结果表明,板-墙约束弯矩随墙顶竖向压应力增加而增加,随板-墙相对线刚度增加而降低,板的支承长度影响较小;墙顶竖向压应力很小时,GB 50003规范的计算结果与EC6规范以及所提出方法有较大误差;所提出方法的计算结果介于GB 50003规范与EC6规范之间。 The analysis method of the interaction between RC beam and masonry wall based on the results of beam-wall test models was used for the compressive capacity calculation of unreinforced masonry wall in the code of GB 50003.It is necessary to study the interaction between floor slabs and masonry walls because there is no internal arch in the wall and the stiffness of the floor slab is much smaller than that of the beam.The influence of the wall upper compressive stress,the stiffness ratio of slab to wall and the supporting length on the constraining moment of masonry walls was analyzed using the finite element analysis method verified by the test results.The design method of masonry wall based on the moment reduction factor of the frame structure was proposed,and the calculation results of the method was compared with the calculation results by codes of GB 50003 and EC6.The results show that the constraining moment of the slab-wall increases with the increase of the wall upper compressive stress,decreasing with the increase of the relative linear stiffness ratio of the slab-wall,and the supporting length of the slab is less affected.The calculation result by the code of GB 50003 had a large error with those by the code of EC6 and the proposed method when the wall upper compressive stress was small.The calculation results of the proposed method were between codes of GB 50003 and EC6.

作者梁建国江萌骁万巨波刘亚平 LIANG Jianguo;JIANG Mengxiao;WAN Jubo;LIU Yaping(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;China Machinery International Engineering Design&Research Institute Co.,Ltd.,Changsha 410007,China;Changchun New Xingyu Construction and Installation Co.,Ltd.,Changchun 130000,China)

机构地区长沙理工大学土木工程学院中机国际工程设计研究院有限责任公司长春新星宇建筑安装有限责任公司

出处《建筑结构》 CSCD 北大核心 2020年第14期131-136,共6页 Building Structure

基金国家自然科学基金面上项目(51678067)。

关键词砌体结构受压构件板-墙约束作用约束弯矩有限元分析 masonry structure compressive element interaction between slab and wall constraining moment finite element analysis

分类号 TU365 [建筑科学—结构工程]