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首页> 外文期刊>Structural Design of Tall Buildings >Effects of soil-structure interaction and lateral design load pattern on performance-based plastic design of steel moment resisting frames
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Effects of soil-structure interaction and lateral design load pattern on performance-based plastic design of steel moment resisting frames

机译：土 - 结构相互作用与横向设计负荷图案对钢力矩塑造框架塑性设计的影响

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摘要

The effects soil-structure interaction (SSI) and lateral design load-pattern are investigated on the seismic response of steel moment-resisting frames (SMRFs) designed with a performance-based plastic design (PBPD) method through a comprehensive analytical study on a series of 4-, 8-, 12-, 14-, and 16-story models. The cone model is adopted to simulate SSI effects. A set of 20 strong earthquake records are used to examine the effects of different design parameters including fundamental period, design load-pattern, target ductility, and base flexibility. It is shown that the lateral design load pattern can considerably affect the inelastic strength demands of SSI systems. The best design load patterns are then identified for the selected frames. Although SSI effects are usually ignored in the design of conventional structures, the results indicate that SSI can considerably influence the seismic performance of SMRFs. By increasing the base flexibility, the ductility demand in lower story levels decreases and the maximum demand shifts to the higher stories. The strength reduction factor of SMRFs also reduces by increasing the SSI effects, which implies the fixed-base assumption may lead to underestimated designs for SSI systems. To address this issue, new ductility-dependent strength reduction factors are proposed for multistory SMRFs with flexible base conditions.
机译：通过综合分析研究，研究了土壤 - 结构相互作用（SSI）和横向设计载荷图案对设计具有基于性能的塑料设计（PBPD）方法的钢力矩抵抗框架（SMRF）的地震响应。 4-，8-，12-，14-和16层模型。采用锥形模型来模拟SSI效果。一组20个强大的地震记录用于检查不同设计参数的影响，包括基本周期，设计负载模式，目标延展性和基础灵活性。结果表明，横向设计负载图案可以显着影响SSI系统的无弹性强度需求。然后识别所选帧的最佳设计负载模式。尽管在传统结构的设计中通常被忽略SSI效应，但结果表明SSI可以大大影响SMRF的地震性能。通过提高基础灵活性，较低楼层水平的延展性需求降低，最大的需求转向更高的故事。 SMRF的强度缩减因子也通过增加SSI效应来减少，这意味着固定基础假设可能导致SSI系统的低估设计。为了解决这个问题，提出了具有灵活基础条件的多元SMRF的新延性依赖性强度降低因子。

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