ABSTRACT

A statistical study aimed at estimating residual displacement spectrum (C_r) of single-degree-of-freedom (SDOF) systems with a given damage index is developed. The C_r are calculated with the Park-Ang damage model, which can be parameterized in terms of the ultimate ductility factor μ_u and energy dissipation factor β, for SDOF systems subjected to 228 ground motions. The variation in C_r with site conditions, damage model, postyield stiffness ratio and stiffness degradation is investigated. The results showed that μ_u and β had moderate and negligible effects on C_r, respectively. Reliable estimation of damage-based C_r can facilitate the performance-based design of structures.

摘要

开发了一项旨在估计具有给定损伤指数的单自由度 (SDOF) 系统的残余位移谱 ( C _{r ) 的统计研究。}C _r是用 Park-Ang 损伤模型计算的，对于承受 228 次地面运动的 SDOF 系统，该模型可以根据极限延性因子μ _u和能量耗散因子β进行参数化。研究了C _r随场地条件、损伤模型、屈服后刚度比和刚度退化的变化。结果表明，μ _u和β对 Cr 的影响适中且可忽略不计_。， 分别。基于损伤的C _r的可靠估计可以促进基于性能的结构设计。