弹性支承索拉力动力检测理论与试验研究

英文篇名：Theoretical and experimental study on cable tension estimation by vibration method accounting for flexural stiffness and flexibility support
中文刊名：地震工程与工程振动
英文刊名：Journal of Earthquake Engineering and Engineering Vibration
作者：魏金波 ; 李国强 ; 段欣 ; 蒋夏子俊
英文作者：WEI Jinbo1 ; 2 ; LI Guoqiang2 ; 3 ; DUAN Xin4 ; JIANG-XIA Zijun1(1.Jiangsu Green Building Research Center ; Nanjing 210009 ; China ; 2.College of Civil Engineering ; Tongji University ; Shanghai 200092 ; China ; 3.State Key Laboratory for Disaster Reduction in Civil Engineering ; Tongji University ; Shanghai 200092 ; China ; 4.Nanjing Tianhua Bairun Investment Development Co. ; LtD ; Nanjing 210009 ; China)
中文关键词：抗弯刚度 ; 弹性支承 ; 弹性嵌固 ; 索力 ; 动力检测
英文关键词：flexural stiffness ; elastic support ; rotational end restraints ; cable tension ; dynamic detection
出版日期：2011-06-15
机构：江苏省绿色建筑工程技术研究中心;同济大学土木工程学院;同济大学土木工程防灾国家重点实验室;南京天华百润投资有限公司;
年：2011
期：03
出版单位：地震工程与工程振动

摘要

为了提高索力动力检测精度,考虑索的抗弯刚度、弹性嵌固和弹性支承等因素建立数学物理模型,推导出进行索力和边界条件动力检测的实用公式。该公式当弹性支承刚度趋于无穷时,收敛于不考虑弹性支承的索力动力检测公式。设计了三个试验验证索力和边界条件动力检测方法的有效性,试验结果表明:弹性支承刚度较小时,不考虑弹性支承对动力检测影响的索力检测结果误差很大,必须考虑弹性支承对索力动力检测的影响;考虑弹性支承影响的动力检测实用公式具有较高的精度。
This paper presents a systematic approach to estimating the cable tension,when flexural stiffness,rotational end restraints and elastic support are taken into account.To estimate the cable tension precisely,the theoretical model considering flexural stiffness,rotational end restraints and elastic support is formed,then the formulas to estimate cable tension and boundary conditions are found and when the elastic support stiffness is infinite,the formulas are the same as the formulas that do not account for the influence of elastic support.Three elastic support stiffness experiments are conducted to verify the estimation approach,and the experiments' results show: when the elastic support stiffness is small,the estimated cable tension deviates from the actual cable tension;the formula considering flexural stiffness and elastic support stiffness can estimate the cable tension precisely.

引文

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