[1]项贻强,邱政,Bishnu Gupt Gautam.考虑滑移效应的体外预应力钢-混凝土组合梁自振频率分析[J].东南大学学报(自然科学版),2017,47(1):107-111.[doi:10.3969/j.issn.1001-0505.2017.01.019]
 Xiang Yiqiang,Qiu Zheng,Bishnu Gupt Gautam.Analysis on natural frequencies of steel-concrete composite beam with external prestressed tendons considering slip effects[J].Journal of Southeast University (Natural Science Edition),2017,47(1):107-111.[doi:10.3969/j.issn.1001-0505.2017.01.019]
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考虑滑移效应的体外预应力钢-混凝土组合梁自振频率分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第1期
页码:
107-111
栏目:
土木工程
出版日期:
2017-01-18

文章信息/Info

Title:
Analysis on natural frequencies of steel-concrete composite beam with external prestressed tendons considering slip effects
作者:
项贻强12邱政1Bishnu Gupt Gautam1
1浙江大学建筑工程学院, 杭州 310058; 2浙江大学唐仲英传感材料及应用研究中心, 杭州 310058
Author(s):
Xiang Yiqiang12 Qiu Zheng1 Bishnu Gupt Gautam1
1 College of Civil and Architectural Engineering, Zhejiang University, Hangzhou 310058, China
2 Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310058, China
关键词:
体外预应力 钢-混凝土组合梁 滑移 自振频率 动力刚度修正系数法
Keywords:
external prestressed tendon steel-concrete composite beam slip natural frequency dynamic stiffness modified coefficient method
分类号:
TU398
DOI:
10.3969/j.issn.1001-0505.2017.01.019
摘要:
为了研究滑移与体外预应力对钢-混凝土组合简支梁自振频率的影响,提出了适用组合梁自振频率计算的静力折减刚度法和动力刚度修正系数法.以一根跨径为5 m的钢-混凝土组合简支试验梁为研究对象,分别采用静力折减刚度法、动力刚度修正系数法及换算截面法计算梁的自振频率,并将计算值与试验实测值进行对比.结果表明,采用动力刚度修正系数法计算得到的体外预应力组合梁的自振频率更接近于实测值,采用静力折减刚度法和换算截面法计算得到的梁的自振频率与实测值之间存在较大误差.当体外预应力值为100 kN时,换算截面法和静力折减刚度法与实测值的误差分别为19.3%和7.9%,动力刚度修正系数法误差则仅为2.9%.
Abstract:
To study the influence of the slip and the external prestressed tendons on the natural frequencies of the simply-supported steel-concrete composite beam, the static reduced stiffness method(SRSM)and the dynamic stiffness modified coefficient method(DSMCM)were proposed. Taking a simply-supported steel-concrete composite experimental beam with the span of 5 m as a research object, the natural frequencies of the beam were calculated by the proposed SRSM, the DSMCM and the transformed section method(TSM), respectively. The calculation results were compared with the dynamic test results. The results show that the natural frequencies of the steel-concrete composite beam with the external prestressed tendons calculated by the proposed DSMCM are closer to the dynamic test results,while those predicted by the SRSM and the TSM exhibit big errors. When the external prestressing is 100 kN, the errors of the TSM and the SRSM are 19.3% and 7.9%, respectively, while that of the DSMCM is only 2.9%.

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备注/Memo

备注/Memo:
收稿日期: 2016-07-13.
作者简介: 项贻强(1959—),男, 博士, 教授, 博士生导师, Xiangyiq@zju.edu.cn.
基金项目: 国家自然科学基金资助项目(51541810)、浙江大学唐仲英基金会资助项目.
引用本文: 项贻强,邱政,Bishnu Gupt Gautam.考虑滑移效应的体外预应力钢-混凝土组合梁自振频率分析[J].东南大学学报(自然科学版),2017,47(1):107-111. DOI:10.3969/j.issn.1001-0505.2017.01.019.
更新日期/Last Update: 2017-01-20