土壤结构相互作用和地面运动参数对RC建筑的地震脆弱性的影响
Pranoy Debnath1, Tanmoy Das1, Deepankar Choudhury2
1Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
Scientific reports
|February 17, 2026
概括
土壤结构相互作用 (SSI) 显著影响钢筋混凝土 (RC) 结构. 考虑SSI揭示了结构性位移和脆弱性的增加,特别是在柔软的土壤和近断层的地震事件中,强调对地震设计的特定地点的分析.
科学领域:
- 地质技术工程 地质技术工程
- 结构工程 结构工程
- 地震工程的工程是地震工程.
背景情况:
- 钢筋混凝土 (RC) 结构的地震性能受到土壤结构相互作用 (SSI) 的严重影响.
- SSI的影响取决于土壤特性,基础灵活性和地震输入.
- 了解SSI对于准确的地震脆弱性评估至关重要.
研究的目的:
- 调查五层RC框架结构的地震反应和脆弱性,考虑明确的SSI.
- 评估SSI对横移,层间漂移和地震脆弱性的影响.
- 为了比较不同的土壤构成模型来模拟地震反应.
主要方法:
- 在PLAXIS3D中开发一个三维数值模型来模拟结构与土壤的相互作用.
- 使用莫尔 - 库伦 (MC) 模型用于粘土土壤和硬化土壤模型与小应变硬度 (HSS) 砂土壤.
- 使用近断层和远场地面运动生成脆弱性曲线.
主要成果:
- 与MC模型相比,HSS模型在捕捉沙性土壤的地震反应方面表现出更高的准确性.
- SSI可以增加横向位移和层间漂移,特别是在软粘土土壤和灵活的基础上.
- 结合SSI和近断层地面运动,在较低的顶点地面加速 (PGA) 水平上超过损坏状态的概率会增加.
结论:
- SSI显著影响了RC结构的地震响应和脆弱性.
- SSI的影响取决于场景,强调需要特定地点的土壤条件.
- 结合现实的SSI建模对于基于性能的地震设计和脆弱性评估至关重要.
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