Investigation and modeling of deformation structures on ground surface caused by fault rupturing

断层破裂引起的地表变形结构研究与建模

基本信息

批准号：
13450191
负责人：
TANI Kazuo
金额：
$ 5.25万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450191/
关键词：
Fault rupture Earthquake Fault displacement Incompetent surface layer 末固結被覆層(表層地盤)

项目摘要

In general, earthquake resistance design methods typically thke into account the structural failures by earthquake vibration and ground movements by liquefaction. However, serious fault rupture hazards on engineering structures were seen in Cokaeri earthquake, Turkey, and Chi-Chi earthquake, Taiwan, in 1999. Thus, this study focuses on mitigation technology for fault rupture hazards.In 2001, a novel idea of mitigation measures was proposed that utilized the cushion effect of incompetent surface layer above active faults. Various forms of ground improvement methods were devised. This invention was patented claiming as a new ground improvement method, Application No.2001-316161.In 2002, a series of physical model tests and numerical analyses were conducted. The results demonstrated that the improved ground comprised of an absorption layer and a rigid beam layer showed remarkable performance. Furthermore, flexural rigidity of the rigid beam layer and locations of anchors were proved to be some of the important design parameters.In 2003, appropriate locations of anchors were investigated for dip-slip faults by the model tests. Design calculation method was also devised assuming the rigid beam layer as elastic beam resting on Whinkler's springs. Then, some trial calculations simulating the experimental results proved that this design model was adequate in predicting the behaviors of the improved ground. Finally, and attempt was made to calculate the prototype behavior assuming a railway truck crossing strike-slip fault. The computed results demonstrated that the proposed ground improvement method was effective in reducing the structural damages on the railway facilities significantly.

通常，地震抗性设计方法通常会考虑到地震振动和地面运动的结构故障。然而，在1999年，台湾的Cokaeri地震，土耳其和Chi-Chi地震中看到了严重的断层破裂危害。因此，这项研究的重点是减轻破裂危害的缓解技术。2001年，提出了一种新颖的减轻措施的想法，提出了一种新颖的想法，提出了库什的表面表面层面层面层的cushion效果。设计了各种形式的地面改进方法。该发明被专利，声称是一种新的地面改进方法，即2002年第2001-31611.2002号应用，进行了一系列的物理模型测试和数值分析。结果表明，由吸收层和刚性梁层组成的改进地面表现出了显着的性能。此外，刚性光束层的弯曲刚度和锚点的位置被证明是一些重要的设计参数。在2003年，通过模型测试研究了适当的锚定位置，以解决倾斜断层。设计计算方法还假设刚性光束层是弹性梁均位于Whinkler弹簧上。然后，一些模拟实验结果的试验计算证明，该设计模型足以预测改进的地面行为。最后，假设铁路卡车穿越滑滑断层，试图计算原型行为。计算的结果表明，所提出的地面改进方法可有效地大大减少铁路设施的结构损失。