【摘要】 角钢的受力性能对预应力自复位框架结构(PTED)的抗震性能有着重要的影响。为了研究角钢的拉压恢复力模型,完成10对角钢的拟静力试验,在试验研究的基础上,构建角钢的拉压恢复力模型,给出角钢屈服荷载的计算公式;利用试验结果验证角钢受拉初始刚度计算公式的准确性,对角钢的屈服后荷载进行线性回归并得到角钢的屈服后刚度表达式;基于角钢的拉压恢复力模型,对角钢的拟静力试验进行数值模拟,所得结果与试验结果吻合良好,验证角钢拉压恢复力模型的准确性。更多还原

【Abstract】 The performance of the angles has an important influence on the seismic performance of the self-centering post-tensioned precast structure(simplified as PTED). In order to study the restoring force model of the angles under repeated tension and compression, the 10 quasi-static tests of the angles are completed. The restoring force model of the angles under tension and compression are proposed on the basis of the experimental study. The accuracy of calculation for yield load and initial stiffness of the angles are verified and the formula of the yield load is modified based on the test results. The linear regression is made for the load after yield and the expression of the stiffness after yield is obtained. Based on the restoring force model of the angles, the quasi-static tests of the angles are simulated and the results are in good agreement with those obtained in the tests. The correctness of the tension and compression restoring force model for the angles is verified.更多还原