对框架结构-站点系统穿越反向断层的地震损伤的实验分析
Jing Tian1,2, Haonan Zhang3, Shihang Qu4
1School of Civil Engineering, Institute of Disaster Prevention, Sanhe 065201, China.
Sensors (Basel, Switzerland)
|November 27, 2025
概括
穿过活跃断层的建筑物经历了地震失位造成的严重损坏. 物理模型表明,跨越断层的结构明显倾斜,与悬挂墙上的结构不同,特别是在高角度的沉沙场.
科学领域:
- 地质技术工程 地质技术工程
- 地震工程的工程是地震工程.
- 结构工程 结构工程
背景情况:
- 靠近活跃断层的建筑容易受到地震期间断层位移造成的严重损坏.
- 了解"表面破裂区-超负荷-基础-超结构"系统的动态反应对于地震设计至关重要.
研究的目的:
- 研究受基岩位移影响的集成土壤结构系统的动态反应机制.
- 分析表面破裂,基础变形和结构反应的演变.
主要方法:
- 使用一种新型装置进行物理模型测试,模拟可调节的俯冲角 (45°和70°) 的反向断层.
- 实验使用沙子和粘土作为超负荷材料来模拟断层脱位对结构的影响.
- 监测了表面破裂演变,基础变形和结构倾斜在不同位移大小下.
主要成果:
- 断层破裂模式取决于位移大小,土壤类型和断层俯冲角度,经历三个阶段:初始破裂,传播和透.
- 穿过断层的建筑物经历了显著的倾斜和差异性结算,甚至在低位移水平下也超过了代码限制.
- 最严重的结构损坏,最大倾斜率为5.5°,发生在高角度沉沙场.
结论:
- 这项研究阐明了跨断层结构的阶段性地震损害演变,为近断层地震设计提供了实验证据.
- 澄清了跨断层和悬挂墙结构之间的明显故障机制,为设计提供了定量基础.
- 断层俯冲角度和土壤类型显著影响损坏严重程度,而高角度俯冲沙地构成最高风险.
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