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首页> 外文期刊>Structural Design of Tall Buildings >Reliable fragility functions for seismic collapse assessment of reinforced concrete special moment resisting frame structures under near‐fault ground motions
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Reliable fragility functions for seismic collapse assessment of reinforced concrete special moment resisting frame structures under near‐fault ground motions

机译：近端故障地面运动下钢筋混凝土特殊力量抵抗框架结构的可靠脆弱功能

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摘要

A collapse fragility function shows how the probability of collapse of a structure increases with increasing ground motion intensity measure (IM). To have a more reliable fragility function, an IM should be applied that is efficient and sufficient with respect to ground motion parameters such as magnitude (M) and source-to-site distance (R). Typically, pulse-like near-fault ground motions are known by the presence of a velocity pulse, and the period of this pulse (T-p) affects the structural response. The present study investigates the application of different scalar and vector-valued IMs to obtain reliable seismic collapse fragility functions for reinforced concrete special moment resisting frames (RC SMRFs) under near-fault ground motions. The efficiency and sufficiency of the IMs as the desirable features of an optimal IM are investigated, and it is shown that seismic collapse assessments by using most of the IMs are biased with respect to T-p. The results show that (Sa(T-1), Sa(T-1)/DSI) has high efficiency and sufficiency with respect to M, R, T-p, and scale factor for collapse capacity prediction of RC SMRFs. Moreover, the multiobjective particle swarm optimization algorithm is applied to improve the efficiency and sufficiency of some advanced scalar IMs, and an optimal scalar IM is proposed.
机译：塌陷脆弱功能显示了在增加地面运动强度测量（IM）的增加时，结构的崩溃概率如何增加。为了具有更可靠的脆弱功能，应该应用IM，其相对于地面运动参数诸如幅度（M）和源到现场距离（R）的地面运动参数是高效且充分的。通常，通过存在速度脉冲，已知脉冲相邻故障接地运动，并且该脉冲（T-P）的周期影响结构响应。本研究研究了不同标量和矢量值IM的应用，以获得近端故障地面运动下钢筋混凝土特殊力量抵抗框架（RC SMRF）的可靠地震塌陷脆性功能。研究了IMS作为最佳IM的所需特征的IMS的效率和充分性，并表明通过使用大多数IMS的地震塌陷评估相对于T-P偏置。结果表明，（SA（T-1），SA（T-1）/ DSI）对M，R，T-P和RC SMRF的崩溃容量预测的折射率因子具有高效率和充分性。此外，应用了多目标粒子群优化优化算法来提高一些高级标量IMS的效率和充分性，提出了最佳标量IM。

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