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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Response of steel moment and braced frames subjected to near-source pulse-like ground motions by including soil-structure interaction effects
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Response of steel moment and braced frames subjected to near-source pulse-like ground motions by including soil-structure interaction effects

机译：包含土-结构相互作用效应的钢矩和支撑框架在近源脉冲状地震动下的响应

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摘要

Most seismic regulations are usually associated with fixed-base structures, assuming that elimination of this phenomenon leads to conservative results and engineers are not obliged to use near-fault earthquakes. This study investigates the effect of soil structure interaction on the inelastic response of MDOF steel structures by using well known Cone method. In order to achieve this, three dimensional multi-storey steel structures with moment and braced frame are analyzed using non-linear time history method under the action of 40 near-fault records. Seismic response parameters, such as base shear, performance of structures, ductility demand and displacement demand ratios of structures subjected to different frequency-contents of near-fault records including pulse type and high-frequency components are investigated. The results elucidate that the flexibility of soil strongly affects the seismic response of steel frames. soil' structure interaction can increase seismic demands of structures. Also, soil has approximately increasing and mitigating effects on structural responses subjected to the pulse type and high frequency components. A threshold period exists below which can highly change the ductility demand for short period structures subjected to near-fault"records.
机译：假定消除这种现象会导致保守的结果，并且工程师没有义务使用近断层地震，那么大多数地震法规通常与固定基础结构相关。本研究采用众所周知的Cone方法研究了土壤结构相互作用对MDOF钢结构非弹性响应的影响。为此，在40条近断层记录的作用下，采用非线性时程法分析了带有弯矩和支撑框架的三维多层钢结构。研究了近故障记录的不同频率含量（包括脉冲类型和高频分量）对基础剪力，结构性能，延性需求和结构位移需求比等地震响应参数的影响。结果表明，土壤的柔韧性极大地影响了钢框架的地震响应。土壤的结构相互作用会增加结构的抗震要求。而且，土壤对受到脉冲类型和高频分量影响的结构响应具有大约增加和减轻的影响。存在阈值周期以下，该阈值周期可以极大地改变经受“近断层”记录的短期结构的延性需求。

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