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许多分析和试验已验证了在设计基本地震作用下,自定心钢框架能消除结构损伤,并恢复初始位置。采用蒙特卡洛模拟,建立3种标准自定心钢框架的非线性模型,施加上千种合成地震波,记录峰值响应,如层间位移和节点转角。分析自定心钢框架对结构特性和几何形状的敏感性,提出改进现有设计程序的一些建议。可靠度方法可用于评价后张法预应力钢绞线达到屈服状态的可能性。对现有设计程序提出改进,并介绍改进抗震设计效果的可靠度方法。
Many analyzes and tests have verified that self-centering steel frames eliminate structural damage and restore initial position under the design of basic earthquakes. Monte Carlo simulation was used to establish the nonlinear model of three kinds of standard self-centering steel frames. Thousands of synthetic seismic waves were applied to record the peak response, such as interlayer displacement and node rotation angle. The sensitivity of self-centering steel frame to structural characteristics and geometry is analyzed, and some suggestions to improve the existing design procedure are put forward. Reliability method can be used to evaluate the post-tensioned prestressing strand to yield the possibility of state. Improve the existing design procedure and introduce the reliability method to improve the seismic design effect.