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Characteristics and Aseismic Design Model of Non-Linearly Behavior of Conduit-Ground System During Strong Seismic Motion

强震时管道-地面系统非线性行为特征及抗震设计模型

基本信息

批准号：
06558061
负责人：
FUCHIDA Kunihiko
金额：
$ 0.77万
依托单位：
YATSUSHIRO COLLEGE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06558061/
关键词：
COMMON UTILITY CONDUIT BURIED PIPELINE SEISMIC RESPONSE MODEL TEST LIQUEFACTION NON-LINEAR LATERAL FLOW

项目摘要

Objects of this study are to clarify the non-linearly behavior characteristics of common utility conduit subjected to seismic ground motions or large ground deformations and to evaluate the important parameters such as soil spring or joint spring for the effective aseismic design model for the conduit. Particularly we focussed on the large ground deformations induced by soil liquefaction during strong groundmotion and performmed laboratory test for the soil springs and build up the analytical method for seismic response of conduit including its joints. Liquefaction tests using the the model pipeline as the conduit model in sand box on shaking table are performed. From the results of shear strains, pore pressures and accelerations the non-linearly characteristics of restorning forces of conduit-ground system during soil liquefaction are investigated. Experiment for the lateral flow induced by soil liquefaction is also performed.Numerical analysis programs for soil liquefaction and lateral flow induced by it are deveroped based on 2 dimensional FEM.Accuracy of these methods is confirmed by comparing the analytical results with the experimental or measured results. Behavior of conduit in soil liquefaction environment is analyzed, which is based on a beam on an elastic foundation. Using modified transfer matrix method as analytical tool, numerical computations are performed for displacements and internal forces of conduit and joints, and important parameters for aseismic design of conduit are evaluated.

本研究的目的是阐明公用管道在地震地面运动或大地面变形下的非线性行为特征，并评估土壤弹簧或接头弹簧等重要参数，以建立有效的管道抗震设计模型。特别针对强地震动时土壤液化引起的大地变形，进行了土弹簧的室内试验，建立了管道及其接头地震反应的分析方法。以该模型管道为管道模型，在振动台沙箱中进行了液化试验。根据剪应变、孔隙压力和加速度的结果，研究了土壤液化过程中管道-地面系统恢复力的非线性特征。还进行了土壤液化引起的侧流实验。基于二维有限元法开发了土壤液化及其引起的侧流数值分析程序。通过将分析结果与实验或实测结果进行比较，验证了这些方法的准确性。分析了基于弹性地基梁的管道在土壤液化环境中的行为。以改进的传递矩阵法为分析工具，对管道及接头的位移和内力进行数值计算，评价管道抗震设计的重要参数。