按新旧规范计算现浇混凝土空心板的对比分析

Comparative analysis on cast-in-place concrete hollow plates calculated according to the new and old concrete specification

现浇混凝土空心板因其适用于大跨度楼板,可节约层高等优势,受到工程界的普遍关注,在工程中的应用越来越多。在新版《混凝土结构设计规范》(GB50010-2010)中,新增了现浇混凝土空心板的相关内容,同时,对受弯构件挠度和裂缝的计算进行了修改。按照原规范和新规范对现浇混凝土空心板进行设计将有所不同,结合工程实例,按照原规范和新规范分别对现浇混凝土空心板进行了计算,并对计算结果进行了对比分析。可供设计建造同类工程时参考。

Cast-in-place concrete hollow plates have been more and more applied in engineering because of the applicability of its large span floor and the advantages of saving the story height. In the new version ＂specification for design of concrete structures＂ （GB50010-2010）, the calculation of the deflection and crack of the flexural members were modified, Meanwhile, also included in the relevant contents of the cast-in-place concrete hollow slabs. Under such a background, according to the original specification and the new standard, the design of the cast in-place concrete hollow slabs will be different. In this paper, combining with an engineering example, according to the original specification and the new standard, the cast-in-place concrete hollow plates have been calculated respectively, and the result of the calculation have been analyzed, which can be a reference for the design and construction of similar works.