Mechanical Behavior Numerical Analysis of Corrugated Steel Lap Joint Under Combined Compression and Bending
As the weak link of prefabricated corrugated steel underground engineering structure,the mechanical behavior of corrugated steel lap joint under the action of axial force and bending moment needs to be studied.Based on the previous full-scale test,the effect of bolt quantities and thicknesses of corrugated steel plate on the failure mode and bending bearing capacity of joint were revealed by numerical simulation method,and the design suggestion and fitting empirical formula were put forward.The results show that the safety redundancy of bolt design in Chinese standard is high and the joint failure mode is mainly corrugated steel plate buckling.The more bolts per wave,the thicker the corrugated steel plate,and the smaller the axial force,the higher the bending bearing capacity of the corrugated steel lap joint.For every increase of 2 bolts per wave,the average ultimate bending moment of the joint increases by 5.9%.For every 2 mm increase in the thickness of the corrugated steel plate,the average increase in the ultimate bending moment of the joint is 21.9%.It is reasonable that the quantity of bolts per wave should be designed to be 6 and the thickness of corrugated steel plate should be designed to be more than 6 mm.The empirical formulas of ultimate bending moment have a good fit,which can provide a basis for checking the joint strength.
万方数据
维普
