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抗震结构对延性性状的要求十分清楚的,但在实际上,对延性系数的赋值是不严密的,主要取决于建筑材料。延性系数有各种不同的定义,因此,对结果的解释必须仔细研究。本文中,讨论单层钢框架受垂直和水平荷载共同作用时的非线性性状。框架的特性是变化的,从强柱弱梁到弱柱强梁。杆件中初始应力的影响也进行了考虑。延性系数按两种不同方法来定义:(1),按第一个塑性铰形成;(2)按荷载—挠度曲线的切线交点。研究表明延性系数依赖于各种参数,延性系数的任意赋值像在实际上进行的那样,证明是不行的。强柱弱梁体系较之另一种体系有较大的延性,是较好的。
The requirements of the seismic structure on the ductility traits are very clear, but in practice, the assignment of the ductility coefficient is not strict and depends mainly on the building materials. There are various definitions of ductility coefficient, so the interpretation of the results must be carefully studied. In this article, we discuss the nonlinear behavior of single steel frames when they are subjected to vertical and horizontal loads. The characteristics of the frame are varied, from strong column weak beams to weak column strong beams. The influence of the initial stress in the rod was also considered. The ductility factor is defined in two different ways: (1) by the first plastic hinge; and (2) by the tangent intersection of the load-deflection curve. Studies have shown that the ductility coefficient depends on various parameters, and any assignment of the ductility coefficient, as actually performed, proves to be impossible. The strong column weak beam system has better ductility than the other system and is better.