空间钢构件考虑损伤累积效应的恢复力模型及试验验证

A HYSTERETIC MODEL AND TEST VERIFICATION FOR SPACE STEEL MEMBER WITH CONSIDERATION OF THE DAMAGE CUMULATION EFFECTS

本文从损伤对钢材性能的影响出发,根据弹塑性损伤铰概念,提出了一种考虑损伤累积效应的空间钢构件非线性恢复力模型,并在这一模型的基础上建立了空间钢构件考虑损伤累积效应的弹塑性刚度矩阵。最后,把试验测得的试件位移曲线和利用本文模型计算的试件位移曲线进行对比。对比结果表明,试验位移曲线和计算的位移曲线吻合得较好,这说明本文建立的考虑损伤累积效应的空间钢构件非线性恢复力模型的正确性。

In this paper, based on the hypothesis of elasto-plastic damage hinge, a hysteretic model for the damage cumulation of space steel member is proposed. Using this model, an elasto-plastic stiffness matrix is set up for space steel members with damage cumulation effects. Comparison of the member displacement curves has been made between the test results and that of the model suggested in this paper, and both agree very well. This proves that with consideration of the damage cumulation effect, the proposed hysteretic model for space steel member is correct.