直线形体外预应力混凝土简支梁自振频率分析

英文篇名：ANALYSIS OF NATURAL FREQENCY OF SIMPLY SUPPORTED PRESTRESSED CONCRETE BEAM WITH EXTERNAL LINEAR TENSION
中文刊名：南阳理工学院学报
英文刊名：Journal of Nanyang Institute of Technology
作者：徐飞鸿 ; 周凯 ; 熊辉霞
英文作者：XU Fei-hong1 ; ZHOU Kai2 ; XIONG Hui-xia2(1.Hennan No.4 Construction sharers Co.Ltd No.2 Branch ; Nanyang 473004 ; China ; 2.Nanyang Institute of Technology ; Nanyang 473004 ; China)
中文关键词：体外预应力梁 ; 动力性能 ; 自振频率 ; 刚度修正
英文关键词：Concrete beam with external prestressing ; Dynamic property ; Natural frequency ; Stiffness updating
出版日期：2009-05-25
机构：河南四建股份有限公司二分公司;南阳理工学院;
年：2009
期：03
出版单位：南阳理工学院学报

摘要

对体外预应力混凝土结构固有频率的分析和计算是研究其动力性能的基础。本文进行了1根直线性体外预应力混凝土简支梁的动力试验,测得了试验梁在张拉阶段的频率变化。为了和试验结果进行对比,本文推导了直线性体外预应力混凝土梁的频率计算公式,对试验梁的自振频率进行了计算,计算结果与试验结果在梁频率的变化趋势及数值上均有较大的出入,最后分析了造成这种误差的原因。
It is important to analyze and calculate natural frequency of concrete structures with external prestressing which is the basis of studying their dynamic properties.Dynamic tests on one simply supported prestressed beam with external linear tendon were carried out,and variation of frequencies of the specie at stage of stretching was deprived.In order to compare calculation results with tests,the paper derives formulas on calculation of natural frequency of simply supported prestressed beam with external linear tendon,the natural frequency of the specie is calculated by the deduced function.It is found that difference in varying tendency of natural frequency between calculation results and tests is great.Finally,the cause of difference between calculation results and tests was presented.

引文

[1]Ayaho Miyamoto,Katsuji Tei,et al.Behaviour of pres-tressed beam strengthened with external tendons.Journal of Structural Engineering,ASCE,2000,126(9):1000-1044
    [2]Pisanit M A.Numberical model for external prestressed beams.Structural Engineering and Mechanics,1996,4(2):177-190
    [3]唐友刚.高等结构动力学,天津:天津大学出版社,2002
    [4]陈慧发,A.F.萨里普著.混凝土和土的本构方程.于天庆、王勋文、刘西拉等编译.北京:中国建筑工业出版社,2004
    [5]熊学玉,王寿生.体外预应力梁振动特性的分析与研究.地震工程与工程振动,2005(2):58-62
    [6]徐磷.体外预应力混凝土梁动力特性研究:[学位论文].武汉:华中科技大学,2003
    [7]张耀庭,张长跑.体外预应力梁基频的理论与实验研究.华中科技大学学报(城市科学版),2005,23(14):21-26