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对双重RC框架-剪切壁结构的地震行为和崩能力的评估,考虑到在不同土壤条件下土壤结构相互作用

Ali Yousefi¹, Payam Tehrani²

¹Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran.

Scientific reports

|January 25, 2026

概括

土壤 - 基础 - 结构相互作用 (SFSI) 显著影响钢筋混凝土 (RC) 双系统的地震性能. SFSI扩大了损坏和塌风险,特别是在软土壤上的较短的建筑物中,因此需要将其纳入抗震设计.

科学领域:

结构工程结构工程
地震工程的工程是地震工程.
地质技术工程地质技术工程

背景情况:

土壤 - 基础 - 结构相互作用 (SFSI) 对地震性能至关重要,但其对钢筋混凝土 (RC) 双系统 (剪切墙和时刻框架) 的影响未得到充分研究.
现有的地震设计规范可能无法完全捕捉到RC双系统中土壤条件,基础灵活性和结构反应之间的复杂相互作用.

研究的目的:

对各种建筑高度和土壤类型 (C和D) 的RC双系统内SFSI对地震需求分布的影响进行调查.
评估SFSI对关键地震响应参数的影响,包括层间漂移,塑料轮旋转和崩脆弱性.

主要方法:

根据ASCE 7-22和ACI 318-19的土壤类型C和D设计了三个RC结构 (5-, 10-, 15-层)
使用OpenSees进行了不弹性时间历史,增量动态分析 (IDA) 和推移分析,用于固定基础和灵活基础场景.
评估了容量曲线,层间漂移,塑料链旋转,损坏分布和开发的崩脆弱性曲线.

主要成果:

SFSI增加了塑料链旋转率高达65% (土壤类型D) 和36% (土壤类型C),在较短的建筑物中效果更为明显.
虽然SFSI对较高结构的设计级地震产生了较小的影响,但IDA显示,由于放大P-Delta效应,高强度的崩概率显著增加.
SFSI降低了高达35%的抗崩边缘,这表明这些系统目前的地震设计规定存在潜在缺陷.

结论:

SFSI显著改变了地震需求分布,并增加了RC双系统的崩风险,特别是在较软的土壤和较短的结构上.
当前的地震设计规范可能低估了与SFSI相关的风险,凸显了需要明确考虑它的必要性.
在地震设计中纳入SFSI效应对于准确的地震需求评估和提高RC双系统安全性至关重要.

关键词:

在动量框架中的缩塑料链.漂移比率的漂移比率是什么增量动态分析 (IDA) 是一种增量动态分析.钢筋混凝土的双重系统.对地震的脆弱性地震的脆弱性土壤结构相互作用的相互作用

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