【作者】 缪智奇； 杨杰； 张耀庭； 陶金友； 刘闯；

【Author】 MIAO Zhi-qi;YANG Jie;ZHANG Yao-ting;TAO Jin-you;LIU Chuang;School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology;Hubei Baoye Building Industrialization Enterprise;

【机构】 华中科技大学土木工程与水利学院； 湖北宝业建筑工业化有限公司；

【摘要】 钢筋桁架混凝土叠合楼板通常配置平行于短向的跨中接缝与跨内钢筋桁架,这种构造方式会导致叠合板长短向刚度较整浇板有所改变,从而对叠合板的内力分布造成影响,现行规范对这种影响的规定存在争议,有必要对其进行深入研究。为此,本文基于弹性薄板理论确定了叠合板的弯矩调整系数,并设计了足尺的两块钢筋桁架叠合板与一块普通预制板试件进行静载试验,同时进行了叠合板的数值模拟分析,结果表明:密拼式接缝与后浇带式接缝都能较好地传递内力;接缝与钢筋桁架的存在不会使架叠合板的弯矩调整系数超出0.95～1.05的范围,建议在工程实际应用时将其等同整浇板进行内力计算。更多还原

【Abstract】 Reinforced truss concrete composite slabs are usually equipped with mid span joints parallel to the short direction and steel truss in the span. This kind of construction method will cause the long and short stiffness of composite slabs to be changed compared with that of integral cast-in-place slabs, which will affect the internal force distribution of composite slabs. There are disputes on the provisions of this effect in the current code, so it is necessary to conduct in-depth research on it. In this paper, based on the elastic thin plate theory, the bending moment adjustment factor of the composite plate is determined, and two full-scale steel truss composite plates and a common precast plate are designed for static load test. At the same time, the numerical simulation analysis of the composite plate is carried out. The results show that both the close joint and the post cast strip joint can transfer the internal force well; The existence of joints and steel truss will not make the bending moment adjustment coefficient of frame composite plate exceed the range of 0.95 ～ 1.05. It is suggested that it should be equal to the integral cast-in-place plate for internal force calculation in engineering practice.更多还原