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首页> 外文期刊>Journal of Earthquake Engineering >Sensitivity Analysis of Reinforced Concrete Frame Structures Under Near-Fault Pulse-Like Ground Motions Using a Broadband Simulation Method
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Sensitivity Analysis of Reinforced Concrete Frame Structures Under Near-Fault Pulse-Like Ground Motions Using a Broadband Simulation Method

机译：宽带仿真方法近端故障脉冲地面运动下钢筋混凝土框架结构的敏感性分析

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摘要

The effect of pulse characteristic of near-fault ground motions on multistory reinforced concrete frame structures is investigated by means of a synthetic broadband ground motion model (SBGM). A simplified analytical pulse model is used to describe the low-frequency components of ground motions, while a stochastic simulation method based on wavelet packet is adopted to simulate the high-frequency components of ground motions. First, the time histories, response spectrum, and structural response of synthetic ground motions are compared with those corresponding to recorded near-fault ground motions. The good agreement indicates that the SBGM model used in this article is a suitable and efficient tool for evaluating the structural response. Sensitivity analysis on structural response of 2-, 4-, 8-, and 12-story building models to the SBGM model input parameters is then performed to identify the key ground-motion parameters which control the main structural response indicators, that is, interstory drift ratio and maximum interstory drift ratio. Final results indicate that the amplitude of velocity pulse in the SBGM model has a significant influence on structural drift demands. Nevertheless, for low-rise buildings, the maximum drift demands would effectively decrease with increasing proportion of high-frequency components. Moreover, the ratio of pulse period to structural fundamental period and number of oscillations impose a large drift demands to the structure under near-fault pulse-like ground motions.
机译：通过合成宽带地运动模型（SBGM）研究了在多晶钢筋混凝土框架结构上的近断层地运动的脉冲特性的影响。简化的分析脉冲模型用于描述地面运动的低频分量，而采用基于小波包的随机仿真方法来模拟地面运动的高频分量。首先，将合成地运动的时间历史，响应谱和结构响应与对应于记录的近故障地面运动的那些进行比较。良好的一致表明本文中使用的SBGM模型是评估结构响应的合适有效的工具。然后执行对SBGM模型输入参数的2-，4-，8-和12层和12层和12层建筑模型的结构响应的敏感性分析，以识别控制主要结构响应指标的关键地运动参数，即鸿沟漂移比率和最大的壁垒漂移比。最终结果表明，SBGM模型中的速度脉冲的幅度对结构漂移需求有显着影响。然而，对于低层建筑，随着高频分量比例的增加，最大漂移需求将有效地降低。此外，脉冲周期与结构基础周期的比率和振荡的比率对近故障脉冲状地运动下的结构施加大的漂移需求。

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