弹性支座对简支箱梁桥振动特性的影响及隔振效果研究

Abstract
Figure/Table
References (15)
Related Citation (15)

Download: PDF (2617 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The similarity model of a simply-supported box-girder bridge with span of 32 m was designed and manufactured with the geometry scale factor of 10. Based on the similarity law of elastic force, the similarity relation between the prototype and model was derived. Then, the modal analysis of the finite element models of the prototype bridge and the model bridge was carried out, and meantime, modal tests of the model bridge were also conducted. The reliability of the similar bridge model was verified by the modal data comparison. Based on this, the influence of the elastic supports with different vertical stiffness on the vibration characteristics of box-girder was studied, and the vibration isolation effect of the elastic supports between the box girder bridge and piers was discussed. The results show that in the middle and high frequency bands of 20—200 Hz, the change of support stiffness has a certain influence on the structural vibration of the middle section of the box-girder, but the influence is very small. The vibration attenuation from the top plate to the flange plate is rather slow, that by the web is somewhat faster, and the vibration attenuates fastest from the top plate to the base plate. The vibration of the piers top is effectively reduced by setting elastic supports between the upper structure and piers of the bridge, and the stiffness of the support has a great influence on the vibration isolation effect of the elastic support. The vibration isolation effect of the elastic support is different at different frequencies. 

Key words： simply-supported box-girder similarity model elastic support hammer excitation test vibration isolation

Received: 29 November 2017 Published: 15 March 2019

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I6/54

[1] Waye K P. Effects of low frequency noise and vibrations: environmental and occupational perspectives [J]. Encyclopedia of Environmental Health, Amsterdam: Elsevier Science, 2011:240-253.
[2] Thompson D J, Jones C J C. A review of the modeling of wheel/rail noise generation [J]. Journal of Sound & Vibration, 2000, 231(3):519-536.
[3] Kawatani M, Kobayashi Y, Kawaki H. Influence of elastomeric bearings on Traffic-induced vibration of highway bridges [J]. Transportation Research Record Journal of the Transportation Research Board, 2000,1696(1):76-82.
[4] Dion C, Bouaanani N, Tremblay R, et al. Real-time dynamic substructuring testing of a bridge equipped with friction-based seismic isolators[J]. Journal of Bridge Engineering, 2012, 17(1):4-14.
[5] Asai T, Chang C M, Spencer B F. Real-Time Hybrid Simulation of a Smart Base-Isolated Building[J]. Journal of Engineering Mechanics, 2014, 141(3):04014128.
[6] 张志俊, 李小珍, 张迅,等. 弹性支座对桥梁车致振动的隔振效果研究[J]. 工程力学, 2015, 32(4):103-111.
ZHANG Zhijun, LI Xiaozhen, ZHANG Xun, et al. Study on the vibration-isolation effects of elastic bearings on train-induced vibration of railway bridge [J]. Engineering Mechanics, 2015, 32(4):103-111.
[7] 蒋通, 马超勇, 张昕. 弹性支承条件下车-桥体系的振动分析[J]. 力学季刊, 2004, 25(2):256-263.
JIANG Tong, MA Chaoyong, Zhang Xin. Dynamic analysis of train-bridge system with elastic supports [J]. Chinese Quarterly of Mechanics, 2004, 25(2): 256-263.
[8] 张常勇, 钟铁毅, 杨海洋. 摩擦摆支座隔震连续梁桥地震能量反应研究[J]. 振动与冲击, 2017, 36(16):63-67.
ZHANG Changyong, ZHONG Tieyi, YANG Haiyang. A study on seismic energy responses of a continuous girder bridge isolated by a friction pendulum system[J]. Journal of Vibration and Shock, 2017, 36(16):63-67.
[9] 黄亮, 徐伟杰, 郭彤. 含新型滑移支座的并联隔震建筑实时混合模拟试验研究[J]. 振动与冲击, 2017(20): 151-157.
HUANG Liang, XU Weijie, GUO Tong. A real-time hybrid simulation of parallel isolated buildings with novel sliding isolators[J]. Journal of Vibration and Shock, 2017(20): 151-157.
[10] Marioni, 陈列, 胡京涛. 橡胶减振支座在台湾高速铁路上的应用[J]. 工程抗震与加固改造, 2011, 33(2):63-66.
Marioni G, CHEN Lie, HU Jintao. Application of EBP on Taiwan high-speed railway [J]. Earthquake Resistant Engineering and Retrofitting, 2011, 33(2): 63-66.
[11] 魏陆顺, 周福霖, 任珉,等. 三维隔震(振)支座的工程应用与现场测试[J]. 地震工程与工程振动, 2007, 27(3):121-125.
WEI Lushun, ZHOU Fulin, REN Min, et al. Application of three-dimensional seismic and vibration isolator to building and site test [J]. Journal of Earthquake Engineering and Engineering Vibration, 2007, 27(3):121-125.
[12] 李小珍, 宋立忠, 张迅. 基于现场锤击试验的高铁简支箱梁振动传递特性研究[J]. 土木工程学报, 2016(05):120-128.
LI Xiaozhen, SONG Lizhong, ZHANG Xun. Study on vibration transmission characteristics of high-speed railway simply-supported box-girders based on in-situ hammer excitation test [J]. China Civil Engineering Journal, 2016(05):120-128.
[13] 林皋. 研究拱壩震动的模型相似律[J]. 水利学报, 1958(1):81-106.
LIN Gao. Study on model similarity law of arch dam vibration [J]. Journal of Hydraulic Engineering, 1958(1):81-106.
[14] 林皋, 林蓓. 结构动力模型试验的相似技巧[J]. 大连理工大学学报, 2000, 40(1):1-8.
LIN Gao, LIN Bei. Similarity technique for dynamic structural model test [J]. Journal of Dalian University of Technology, 2000, 40(1):1-8.
[15] 赵才友, 王平. 钢轨-扣件耦联系统的动力特性试验[J]. 振动、测试与诊断, 2014, 34(4):680-685.
ZHAO Caiyou, WANG Ping. Experimental study on dynamic characteristics of rail-fastener coupled system [J]. Journal of Vibration, Measurement & Diagnosis, 2014, 34(4):680-685.