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U型钢板可作为限位器和阻尼器使用,设计4种U型钢板,分别采用软钢和硬钢制作,进行单推和推拉两种情况下的静力试验,结果表明,厚度较大的硬钢U型钢板易发生断裂;硬钢U型钢板比软钢具有更大的屈服荷载和屈服位移,更适合做限位器;硬钢的滞回曲线呈典型梭形,屈服后荷载仍有较大增长,软钢的滞回曲线呈平行四边形,屈服后荷载增长不大。推导了叠层U型钢板的屈服荷载、屈服位移和弹性刚度的计算公式,设计4种单层和叠层U型钢板,用ABAQUS有限元软件进行建模分析,有限元计算结果与理论分析一致;U型钢板分成n层后,弹性刚度近似折减为原来的1/n~2,屈服荷载近似折减为原来的1/n,屈服位移近似增大为原来的n倍。
U-shaped steel plate can be used as a stopper and damper, designed four kinds of U-shaped steel plate, respectively, made of mild steel and hard steel, single push and push-pull two cases of static test results show that the thickness of the larger Hard U-plate prone to fracture; hard U steel plate has a greater yield than the soft steel yield and yield displacement, more suitable for the stopper; hard steel hysteresis curve was typical spindle, after the load is still there Larger growth, mild steel hysteresis curve was parallelogram, load growth after yield is not large. The formulas for calculating the yield load, yield displacement and elastic stiffness of laminated U-shaped steel sheets are deduced. Four kinds of monolayer and laminated U-shaped steel plates are designed and modeled by ABAQUS finite element software. The results of FEM are consistent with the theoretical analysis ; After the U-shaped steel plate is divided into n layers, the elastic stiffness is approximately reduced to 1 / n ~ 2, the yield load is approximately reduced to 1 / n, and the yield displacement is approximately increased by n times.