摘要：At present, with the gradual deepening of the concept of low-carbon environmental protection, the awareness of safe environmental protection ofbuild-ings has been greatly improved. The efficiency ofas-sembled steel-concrete composite beams can be im-proved through the combination of shear-resistant members. However, the studies on performance of the assembled steel-concrete composite beams are still limited. Therefore, this paper constructs assem-bled steel truss-concrete composite beams by using composite shear connectors. After that, this study puts forward the method of strengthening shear con-nection of composite beams by implanting welding nails and constructs reinforced shear connection composite beams. Taking the positive and negative static load modes as the main evaluation means, the loading performance ofcomposite beams is analyzed through their loading behavior in the loading test, and the fatigue resistance of composite beams is in-vestigated through the fatigue test. The results show that the reinforced composite beams show good loading and fatigue resistance characteristics,and the maximum deflection only increases by 0.39mm after 10,000 load tests, which provides a good tech-nical support for the construction of composite beams in the future. Meanwhile, this research can provide reliable reference for the sustainable devel-opment of green buildings.
