Seismic Damage Prediction and Control in Urban Region Based on Integrated Whole System with Source and Propagation Path and Structure

基于震源传播路径结构一体化的城市地区地震灾害预测与控制

基本信息

批准号：
12450226
负责人：
KAWANO Masahiro
金额：
$ 7.62万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

(1) Structural responses of base isolated buildings and high-rise buildings were predicted on the basis of the ground motion models for the next four great events in Japan: the Minami Kanto Earthquake, the Tokai Earthquake, the Nobi Earthquake and the Yamasaki Earthquake. The prediction results indicate that the ground motion and building structural response are mainly described by the focal distance, geometric relation between site and source, site geological structure, asperity strength and distribution on the fault plane, and source directivity effect.(2) The ground motions in various shapes of alluvial valleys were computed by using a new hybrid method of Riccati equation approach for the wave field inside the basin and the direct BEM for the rest. And we introduced and defined an equivalent flat layer model. The thickness of the surface flat layer was determined so that the theoretical dispersion curve of the surface wave in the flat layer fitted best the one in the alluvial valley. An examination of various cases indicates that complicated amplification patterns induced in alluvial valleys are simply and essentially explained by interference phenomena among the direct wave and the surface waves generated on the valley edges with phase velocities evaluated from the equivalent flat layer model.(3) We developed an analytical approach to estimating an overall seismic reliability or hazardness of structures based on the earthquake excitation model predicted for Osaka city area. And some numerical examples were given to am overall seismic reliability or hazardness of steel and reinforced concrete building structures in Osaka city area. Furthermore, in order to examine the applicability or validity of the developed seismic reliability analysis, a comparison was made between the analytical reliability and the damage magnitude for the 1995 Hyogo-ken Nanbu Earthquake.

（1）基础孤立建筑物和高层建筑物的结构响应是根据日本接下来四个伟大事件的地面运动模型的：Minami Kanto地震，Tokai地震，Nobi地震和Yamasaki地震。预测结果表明，地面运动和建筑物结构响应主要是由焦距，位点和源之间的几何关系，位点地质结构，断层平面上的s骨强度和分布以及源方向性效应来描述。我们介绍并定义了等效的扁平层模型。确定了表面扁平层的厚度，以便在扁平层中表面波的理论分散曲线拟合了冲积谷中的一个。对各种情况的检查表明，在冲积阀中引起的复杂扩增模式简单而基本上是通过直接波之间的现象以及在山谷边缘上产生的表面波和从等效扁平层模型中评估的相位速度产生的。并给出了一些数字示例，以大阪市地区的钢和钢筋混凝土建筑结构的整体地震可靠性或危害。此外，为了检查开发的地震可靠性分析的适用性或有效性，分析可靠性与1995年Yogo-ken Nanbu地震的损伤幅度进行了比较。