Experimental Study on Mechanical Properties of Light Steel Keel Concrete Composite Exterior Wall Panel
The performance of composite wall panels is directly related to the safety of structures.Therefore,prior to the implementation of newly designed and constructed lightweight steel joist composite wall panels,it is imperative to conduct mechanical performance tests to evaluate their safety capabilities.To investigate the deformation and failure mechanism of wall panels,two types of lightweight steel joist concrete composite external wall panels are subjected to four-point bending tests and low-cycle cyclic loading tests,respectively.The results of the four-point bending tests indicate that the calculated equivalent uniformly distributed load exceeds the standard value of wind load for buildings when cracks appear on the wall panel,and the bending performance of the wall panel meets the stress requirements.The low-cycle loading test results reveal that the wall panel undergoes three stages of deformation:elastic stage,elastic-plastic deformation stage,and yielding failure stage.Energy dissipation is mainly realized by elastic-plastic deformation and material failure after steel yielding.The energy dissipation before yielding accounts for 6.19%of the total energy dissipation,and the cumulative energy dissipation after yielding shows a quadratic parabolic growth,which reflects the favorable seismic capability of the wall panel.Outcome of this work can provide a basis for practical application.
wall panelmechanical propertiesbending testlow-cycle cyclic loading test
万方数据
维普
