单桩复合地基上块体振动速度导纳的灵敏度特性

英文篇名：Sensitivity Analysis for Velocity Admittance of Block on Single-Piled Composite Foundation
中文刊名：上海交通大学学报
英文刊名：Journal of Shanghai Jiaotong University
作者：王瑞峰 ; 宋春雨 ; 陈龙珠
英文作者：WANG Rui-feng ; SONG Chun-yu ; CHEN Long-zhu(Inst. of Eng. Safety & Disaster Prevention ; Shanghai Jiaotong Univ. ; Shanghai 200030 ; China)
中文关键词：复合地基 ; 机械导纳 ; 灵敏度 ; 有限元-无限元耦合解
英文关键词：composite foundation ; mechanical admittance ; sensitivity analysis ; finite-infinite element (hybrid) method
出版日期：2005-05-30
机构：上海交通大学安全与防灾工程研究所,上海交通大学安全与防灾工程研究所,上海交通大学安全与防灾工程研究所上海200030 ,上海200030 ,上海200030
年：2005
期：05
出版单位：上海交通大学学报

摘要

简要分析了当前复合地基动测技术的不足,提出了用单桩复合地基上块体的竖向振动速度导纳曲线检测桩—土体系工程性状的机械导纳法.文中应用轴对称有限元—无限元耦合解,较系统地分析了块体速度导纳及其关于桩身弹性模量的灵敏度特性,包括地基土剪切波速、桩长和桩身缺陷的影响规律,对进一步完善复合地基动测技术以及用复合地基作动力机器基础时的优化设计具有重要的指导意义.
The conventional dynamic tests of composite foundation were reviewed and the velocity or (mechanical) admittance method for a block on single-piled composite foundation was recommended. By using the axis-symmetrical finite element-infinite element hybrid method, the sensitivity of mechanical (admittance) to pile modulus along pile shaft was numerically analyzed, including the effects of the shear wave (velocity) of subsoil and pile length as well as the defects of pile shaft. The conclusion will be of guide significance on further research of the proposed mechanical admittance method and on the design optimization for dynamic machines with composite foundations.

引文

[1]　徐攸在.动测技术在复合地基承载力测定中的应用[J].工业建筑,1993,3(4):3-5.XUYou-zai.Theapplicationofdynamictestingindeterminingbearingcapacityofcompositesoilfoundation[J].IndustrialConstruction,1993,3(4):3-5.
    [2]　李丕武.地基承载力动测的附加质量法[J].地球物理学报,1993,36(5):683-687.LIPei-wu.Additivemassmethodmeasureddynamicallyfoundationbearingcapacity[J].ChineseJournalofGeophysics,1993,36(5):683-687.
    [3]　徐攸在.桩的动测新技术[M].北京:中国建筑工业出版社,2002.
    [4]　宋春雨,陈龙珠,夏宇峰.单桩复合地基上块体振动特性分析[J].地震工程与工程振动,2004,24(2):134-140.SONGChun-yu,CHENLong-zhu,XIAYu-feng.Dynamicsofblockoncompositefoundationwithsinglepile[J].EarthquakeEngineeringandEngineeringVibration,2004,24(2):134-140.
    [5]　梁国钱,陈龙珠,吴世明.半无限轴对称动力课题的一种边界处理方法[J].岩土工程学报,1995,17(3):19-25.LIANGGuo-qian,CHENLong-zhu,WUShi-ming.Boundaryprocessingofsemi-infinitespaceforsolvingaxi-symmetricaldynamicproblems[J].ChineseJournalofGeotechnicalEngineering,1995,17(3):19-25.
    [6]　梁国钱.桩的振动特性及其检测方法的研究[D].杭州:浙江大学建筑工程学院,1994.
    [7]　KhaliliN,YazdchiM,ValliappanS.Wavepropagationanalysisoftwo-phasesaturatedporousmediausingcoupledfinite-infiniteelementmethod[J].SoilDynamicsandEarthquakeEngineering,1999,18:533-553.