钢筋混凝土叠合板受剪承载力可靠度分析

Reliability analysis of shearing capacity for reinforced concrete composite slab

为了研究钢筋混凝土叠合板受剪承载力可靠度,提出基于JC法的可靠度计算方法。考虑叠合板跨度、活荷载取值、后浇层厚度等因素的影响,应用科学计算软件Matlab进行数值分析。计算结果表明,随着板跨、活荷载的增加,板的抗剪承载力可靠度下降。叠合板板底纵筋外伸会造成安装困难,在多数情况下,板底钢筋不外伸也可满足规范中的板抗剪承载力可靠度指标要求。

In order to study the reliability of shearing capacity of composite slab,the method of reliability calculation based on JC method was proposed.The span of composite slab,live load,cast-in-place layer thickness were considered,the reliabilities were calculated of numerical examples by scientific computing software Matlab.The results show that with the span and live load increases,the reliability of capacity shearing of reinforced concrete composite slab declines.The bottom protruding bars of reinforced concrete composite slab can bring inconvenience to fabrication and installation.Without bottom protruding bars,the reliability of shearing capacity can meet the requirement of code.