Study On The Flexural Performance Of Connection Component By Using Partial Steel Tube

Considering energy conservation and environment protection, designing andconstructing low-carbon, environmental and seismic prefabricated structure to achieveconstruction industrialization, prefabricating and refinement is the development trend ofthe construction. Various experiment and theoretical analysis were carried out toresearch the connection of the prefabricate structure, but there was not amature connection technology, so the development of the prefabricated structure was constrained. This paper proposed a new connection technology, that is partial outsourcingsquare steel tube, and bending experiment was carried out to study the performance of the prefabricate assembly member with this new connection.(1) Two types of connection were given：local steel tube with bolt tendonsconnection and local pure steel pipe connection. Six prefabricated specimen withdifferent thickNess or length of the steel tube and a cast-in-place specimen were madeto carry out the experiment for studying the deflection and bearing capacity of theprefabricate specimen.(2) The developing law of deflection, slipping and cracking of the prefabricatespecimen were got after bending load test were carried out on the prefabricate specimenwith different thickNess and length of the steel tube. Meanwhile, the yield load, ultimateload and the failure modes were gotten. All the performance of the prefabricatedspecimen was compared with the cast-in-place specimen.The experimental proved that prefabricate specimen by using steel tube withtendons could earn near the same bearing capacity with cast-in-place specimen,also itscracking load and yield load were equal to the cast-in-place specimen, but its deflection under the yield load was little smaller than that of the cast-in-place specimen. Theexperimental also proved that the bearing capacity of the specimen by using pure steeltube connection was smaller than that of the specimen by using steel tube with tendonand the cast-in-place specimen. Meanwhile, slip was appeared under small load and itdeveloped quickly. The whole loading test indicated that the thickNess and the length ofthe steel tube were the most factors that affected the performance of prefabricatespecimen, and increasing the thickNess and length of the steel could improve thebearing capacity and decrease the deflection of the prefabricated specimen within acertain range.(3)Based on the characteristics of the prefabricate specimen by using steel tube with tendons and the purpose of this context, a reasonable model was made by using the f-inite element software ANSYS.The results of finite element model were in good precision with the experimental results on bearing capacity,cracking, bar stress and other respects.Further numerical simulation was conducted on the prefabricate specimen by using steel tube with tendons.(4)Based on summarizing the results of experiment and finite analysis,this article concluded the design advice and research prospects on the connection by using steel tube with tendon.