（安徽建筑大学土木工程学院， 合肥 230022）

［摘要］针对叠合式双向楼板拼缝存在使截面刚度减弱尚无弯矩、挠度有效计算方法的实际情况，采用ABAQUS软件建立叠合式双向楼板分析模型，根据弹性理论探讨叠合式双向楼板跨中弯矩、挠度的变化规律。采用定量计算和定性分析的方法，将四边简支的叠合式双向楼板与现浇双向楼板的受力情况进行对比分析。结果表明：叠合式双向楼板长向刚度减弱，长向抗弯能力减小，短向抗弯能力增大；叠合式双向楼板短向弯矩值增加，长向弯矩值不予折减仍按现浇双向板弹性理论配筋；弹性理论计算结果、ABAQUS软件模拟结果和试验测得数据吻合较好，可为同类楼板的研究和工程应用提供参考。

［关键词］叠合式双向楼板； 现浇双向楼板； 刚度减弱； 有限元分析

中图分类号：TU375-2文献标识码：A文章编号：1002-848X(2016)22-0099-06

Research on internal force and deflection of superimposed two-way floor with  stiffness weakened

Zhang Xiang， Shen Xiaopu

（School of Civil Engineering， Anhui University of Architecture, Hefei 230022, China）

Abstract:There is no effective calculation method for bending moment and deflection for superimposed two-way floor because the floor seam weakens the cross-section stiffness. Using ABAQUS software, analysis model of superimposed two-way floor was established and variation rules of mid-span bending moment and deflection of superimposed two-way floor were studied according to the theory of elasticity. By using the method of quantitative calculation and qualitative analysis, mechanical conditions of the superimposed two-way floor with four edges simply supported were compared with that of the cast-in-place two-way floor with four edges simply supported. The results show that the stiffness in long side direction for superimposed two-way floor is reduced and flexural capacity in short side direction decreases; bending moment in short side direction for superimposed two-way floor increases, and bending moment value in long side direction is still reinforced according to  cast-in-place two-way floor elasticity theory of instead of value reduction; calculated results according to the elasticity theory, ABAQUS software simulation results and experimental measured data agree well with each other, providing a reference for the research and engineering application of the same floor.

Keywords:superimposed two-way floor; cast-in-place two-way floor; stiffness weakened; finite element analysis

*国家自然科学基金资助项目（51541806）,安徽省自然科学基金项目（090414272X)。

作者简介: 张翔，硕士研究生，Email：zxww660@126.com。