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Integrated Evaluation for Earthquake Resistance of Embankmet Dams Damaged by the 1995 Hyogoken-Nanbu Earthquake and Application of the Research Results to Engineering Education

1995年兵库县南部地震受损堤坝抗震综合评价及研究成果在工程教育中的应用

基本信息

批准号：
10556052
负责人：
UCHIDA Kazunori
金额：
$ 8.19万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2001
项目状态：
已结题

项目摘要

1) Location, damage and emergency repair of embankment dams damaged by the 1995 Hyogoen-nanbu Earthquake are unified in a GIS database.2) The following in-situ tests were performed to evaluajte earthquake resistance of restored embankments and foundations at the embankment dams of Niroku-ike, Sugatadani-ike and Daiteibou-ike damaged ; boring log, PS loging, Reflection logging.3) Stability analysis during earthquake and earthquake response analysis were performed to consider the main cause of the damage for the embankment dams of Idenoshiri-ike and Niroku-ike, and it is concluded that the main cause is the development of excess pore pressure in the upper slope of these dams.4) Cyclic undrained triaxial tests under strain-path control were performed using embankment materials sampled at the three embankment dams mentioned above. The purpose of this test is to consider the possibility of simulating soil strain behavior during earthquake usirtg test results. Control and data acquisition programs are developed for this test using Visual Basic. As a result of the test, it is concluded that the control of strain amplitude is easier than the conventional test under stress-path control, and that the deformation characteristics of shear modulus ratio and damping ratio.5) K0 consolidation test is easily controlled using strain-path control.6) The dynamic deformation analysis of two-dimensional model of embankment dams was proposed to evaluate earthquake resistance of embankment dams using dynamic deformation parameters obtained form the cyclic tests.7) Color figures of the analyzed results were shown to be available for design using KSUWAD.

1)将1995年兵库县南部地震中受损堤坝的位置、受损情况和紧急修复情况统一到GIS数据库中。2）对受损堤坝Niroku-ike、Sugatadani-ike和Daiteibou-ike进行了以下现场试验，以评估修复后堤坝和基础的抗震能力;钻孔测井、PS测井、反射波测井。3）针对井之尻池和二陆池两座土石坝的主要破坏原因，进行了地震稳定性分析和地震反应分析，4）采用应变路径控制的循环不排水三轴试验方法，对上述三个土石坝的坝体材料进行了试验研究。本试验的目的是考虑利用试验结果模拟地震时土壤应变行为的可能性。用Visual Basic语言编制了该试验的控制和数据采集程序。试验结果表明，在应力路径控制下，应变幅的控制比常规试验更容易，剪切模量比和阻尼比的变形特性; 5）K 0固结试验易于应变路径控制; 6）两个试验点的动力变形分析结果表明：K 0固结试验的应变路径控制效果较好; 6）两个试验点的动力变形分析结果表明：K 0固结试验的应变路径控制效果较好;提出了土石坝的三维模型，利用动变形参数评价土石坝的抗震性能。分析结果的彩色图形可用于KSUWAD设计。