环境温度和边界条件对混凝土梁式桥自振频率影响研究

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摘要以北京市门头沟地区新建的一座简支梁桥和一座连续梁桥为例，将实测数据、理论分析和有限元模拟相结合研究了环境温度和边界条件对混凝土梁式桥自振频率的影响。首先，分别对两座桥梁进行了24小时的实时监测，每隔一小时采集环境温度、自振频率、伸缩缝宽度等数据。然后，从理论上分别分析了简支梁和连续梁自振频率的影响因素。最后，针对分析结果，用有限元模拟了温度影响下橡胶支座刚度变化、伸缩缝不能正常伸缩和混凝土弹性模量随温度变化这三种情况下桥梁的工作状态，并与实测结果进行对比。结果表明：自然状态下橡胶支座刚度的变化对混凝土梁式桥的自振频率几乎没有影响。混凝土弹性模量的变化、伸缩缝的工作状态都会影响桥梁的自振频率，但对不同结构形式的桥梁影响权重不同。

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关键词 ：自振频率, 环境温度, 边界条件, 橡胶支座, 伸缩缝

Abstract：Take a newly built simple supported beam and a continuous beam in Mentougou as examples,experimental data,theoretical analysis,and finite element simulation were combined to study the effect of environmental temperature and boundary conditions on natural frequencies of concrete beam bridges.First of all,24 hours’ monitor was performed and experimental data including environmental temperature,natural frequencies,and the width of expansion joints were recorded every one hour.Then influences on natural frequencies of simple supported beams and continuous beams were discussed in theory,respectively.Finally,according to the results of theoretical analysis,finite element models of the two bridges were built by Midas Civil to simulate three working conditions of the bridges: the change of stiffness of rubber bearings,expansion joints’ failure,and the change of elastic modulus.The results suggest: under natural conditions,the change of stiffness of rubber bearings almost has no effect on natural frequencies of concrete beam bridges.Both the change of elastic modulus and the working condition of expansion joints can influence the natural frequencies of concrete beam bridges but the weights are different.

Key words： natural frequencies environmental temperature boundary conditions rubber bearings expansion joints

收稿日期: 2016-01-29 出版日期: 2017-04-15

引用本文:

杨殊珍1，刘保东1，杨明哲1，2，李鹏飞1，3. 环境温度和边界条件对混凝土梁式桥自振频率影响研究[J]. 振动与冲击, 2017, 36(8): 164-172.
YANG Shuzhen1,LIU Baodong1,YANG Mingzhe12,LI Pengfei1,3. Effect of environmental temperature and boundary conditions on concrete beam bridges’ natural frequencies. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(8): 164-172.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I8/164

[1] 宗周红，任伟新，郑振飞. 既有桥梁承载能力评估方法[J].地震工程与工程振动，2005, 25(2): 147-152.
ZONG Zhou-hong, REN Wei-xin, ZHENG Zhen-fei. Load-carrying Capability Assessment Methods of Existing Bridges [J].Earthquake Engineering and Engineering Vibration, 2005, 25(2): 147-152.
[2] 刘济科，汤凯. 基于振动特性的损伤识别方法的研究进展[J].中山大学学报：自然科学版，2004, 43(6): 57-61.
LIU Ji-ke, TANG Kai. Advances of Vibration-based Damage Identification Methods [J].Journal of Sun Yatsen University：Natural Science Edition, 2004, 43(6): 57-61.
[3] Messina A，Jones I A，Williams E J. Damage Detection and Localization Using Natural Frequency Changes [C]//Proceedings of Conference on Identification in Engineering Systems. Swansea, U K: 1996: 67-76.
[4] Bart Peeters, Guido De Roeck. One-year Monitoring of the Z24-Bridge:Environmental Effects Versus Damage Events [J].Earthquake Engineering and Structural Dynamics, 2001, 30: 149-171.
[5] Xia Y, Hao H, Zanardo G, et al. Long Term Vibration Monitoring of an RC Slab: Temperature and Humidity Effect [J].Engineering Structures, 2006, 28(3): 441-452.
[6] Kim J.T., Park J.H., Lee B.J.. Vibration-based Damage Monitoring in Model Plate-girder Bridges under Certain Temperature Conditions [J].Engineering Structures, 2007, 29(7): 1354-1365.
[7] 余印根，宗周红，夏樟华. 基于数理统计的环境温湿度对两跨连续梁动力特性影响研究[C]//第十八届全国桥梁学术会议论文集(下册).天津：中国土木工程协会，2008: 914-921.
YU Yin-gen, ZONG Zhou-hong, XIA Zhang-hua. Dynamic Properties Study on Two-span Continuous Beam Influenced by Temperature and Humidity Based on the Method of Mathematical Statistics [C]//Proceedings of the 18th National Bridge Symposium(Ⅱ).Tianjin: China Civil Engineering Association, 2008: 914-921.
[8] Cornwell, P., Farrar, C.R., Doebling, S.W., et al. Environmental Variability of Modal Properties. Experimental Techniques, 1999, 23(6): 45–48.
[9] 许永吉，朱三凡，宗周红. 环境温度对桥梁结构动力特性影响的试验研究[J].地震工程与工程振动，2007, 27(6): 119-123.
XU Yong-ji, ZHU San-fan, ZONG Zhou-hong. Experimental Study on Effects of Environmental Temperature on Dynamic Characteristics of Bridge Structures [J].Journal of Earthquake Engineering and Engineering Vibration, 2007, 27(6): 119-123.
[10] 杨明哲. 考虑环境温度及混凝土依时特性的混凝土梁式桥自振特性演化[D].北京：北京交通大学，2014.
YANG Ming-zhe. Research on Dynamic Characteristics of Concrete Girder Bridge Considering Environmental Temperature and Long Term Performance of Concrete [D].Beijing: Beijing Jiaotong University, 2014.
[11] 宋一凡. 公路桥梁动力学[M].北京：人民交通出版社，2000.
SONG Yi-fan. Dynamics of highway bridges [M].Beijing: China Communications Press, 2000.
[12] 方立志. 计算钢筋混凝土桥梁日照温度应力时弹性模量取值问题的试验研究[J].桥梁建设，1986, (1): 57-63.
FANG Li-zhi. Experimental Study on the Value of Elastic Modulus Calculating the Temperature Stress of Reinforced Concrete Bridges [J].Bridge Construction, 1986, (1): 57-63.
[13] 侯立群，李宏伟，冷志鹏，等. 桥梁实测频率的温度影响分析[J].公路工程，2011, 36(4): 4-7.
HOU Li-qun, LI Hong-wei, LENG Zhi-peng, et al. Analysis and correction method of temperature influence on measured frequency of a bridge [J].Highway Engineering, 2011, 36(4): 4-7.
[14] Comit E.Euro-International Du B. Eton. CEB-FIP Model Code 1990：Design Code [S].London：Thomas Telford，1993.
[15] 杨为. 温度及剪切变形对橡胶支座性能参数的影响研究[D].武汉：华中科技大学，2012.
YANG Wei. Influence of Temperature and Shear Deformation on Performance Parameter of Rubber Bearing [D].Wuhan：Huazhong University of Science and Technology, 2012.
[16] 庄学真，周福霖，徐丽，等. 大直径建筑叠层橡胶隔震装置温度相关性及老化性能研究[J].西安建筑科技大学学报：自然科学版，2009, 41(6): 791-798.
ZHUANG Xue-zhen, ZHOU Fu-lin, XU Li, et al. Research on temperature dependence and aging rigidity of lead steel-plate-laminated-rubber-bearing isolation bearings for building [J].Xi’an Unix. of Arch. & Tech.(Natural Science Edition), 2009, 41(6): 791-798.
[17] 施洲，赵人达. 桥梁结构边界条件变异对固有振动特性的影响分析[J].振动与冲击，2007, 26(2): 141-145.
SHI Zhou, ZHAO Ren-da. Analysis of Effect of Boundary Condition Chances on Free-vibration Characteristics of Bridges Structure [J].Journal of Vibration and Shock, 2007, 26(2): 141-145.
[18] 中华人民共和国交通部.JT/T 4—2004公路桥梁板式橡胶支座[S].北京，电子工业出版社，2004.
Ministry of Transport of the People’s Republic of China. JT/T 4—2004 Laminated Rubber Bearings of Highway Bridge [S].Beijing, Electronic Industry Press, 2004.