大跨度叠合楼板底板试验及有限元分析

摘要

针对现有的大跨度预应力叠合楼板底板刚度较小或自重较大的问题，提出了一种新型的预应力叠合楼板底板。对3块相同的简支叠合板底板进行了静载试验，分析这种底板在静载作用下的挠度、裂缝、极限承载能力等特点，并用 Ansys有限元进行了模拟。试验以及模拟表明：这种底板具有较高的刚度和较强的承载能力，其挠度、开裂以及极限承载能力可按《混凝土结构设计规范》(GB 50010-2010)进行计算。%For the existing large-span composite prestressed bottom slab having small stiffness or large weight,a new type of precast prestressed slab was put forward.Based on the static loading test of the three precast prestressed simply supported slabs,the deflection,the crack,the ultimate bearing capacity were analyzed,which were simulated by the Ansys finite element.The tests and simulations showed that:this precast prestressed slab had high stiffness and well carrying capacity.The deflection,the crack and the ultimate bearing capacity can be calculated according to the code for Design of Concrete Structures (GB 50010-2010).