循环载荷作用下加筋板格极限强度的理论解

Theoretical solution for the ultimate strength of stiffened panels under cyclic loads

为了得到循环载荷作用下加筋板格极限强度的理论解,将加筋板格简化为两端固支的梁-柱模型,以此推导出循环载荷作用下加筋板格极限强度以及应力应变关系的理论计算公式.用Abaqus有限元软件和理论计算公式分别对同一加筋板格实例在循环载荷作用下的极限强度进行计算,结果表明:有限元方法的计算结果与理论方法的计算结果两者误差较小,最大误差为-8.7%,说明理论计算方法是比较合理的,这就为从理论上直接计算加筋板格的极限强度提供了一个简便且有效的方法.

To formulate a theoretical solution for the ultimate strength of stiffened panels under cyclic loads,a theoretical formula of the ultimate strength and stress-strain relationship of stiffened panels under cyclic loads is deduced based on a beam-column model fixed at both ends.The calculated results of a practical example with the theoretical method and the FEM software Abaqus show that the relative error between them is small with a maximum value of-8.7%,demonstrating that the theoretical solution is of reasonable accuracy.This provides a simple and effective theoretical method for calculating the ultimate strength of stiffened panels.