[1]夏修身,张颖周,陈兴冲,等.金属橡胶支座力学性能试验[J].长安大学学报(自然科学版),2019,39(04):92-99.
　XIA Xiu shen,ZHANG Ying zhou,CHEN Xing chong,et al.Experiment on mechanical properties of mental rubber bearing[J].Journal of Chang’an University (Natural Science Edition),2019,39(04):92-99.
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金属橡胶支座力学性能试验()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第39卷
期数:
2019年04期
页码:
92-99
栏目:
道路工程
出版日期:
2019-07-15

文章信息/Info

Title:
Experiment on mechanical properties of mental rubber bearing
作者:
夏修身; 张颖周; 陈兴冲; 李建中; 唐径遥
（1. 兰州交通大学 土木工程学院，甘肃 兰州 730070； 2. 甘肃恒达路桥工程集团有限公司 甘肃省公路路网监测重点实验室，甘肃 兰州 730070； 3. 同济大学 土木工程学院，上海 200092）
Author(s):
XIA Xiushen1;  ZHANG Yingzhou1; 2;  CHEN Xingchong1;  LI Jianzhong3;  TANG Jingyao1
(1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China; 2. Key Laboratory of Highway Network Monitoring in Gansu Province, Gansu Hengda Road and Bridge Group Co., Ltd., Lanzhou 730070, Gansu, China; 3. School of Civil Engineering, Tongji University, Shanghai 200092, China)
关键词:
桥梁工程; 桥梁支座; 金属橡胶; 力学性能试验; 地震反应
Keywords:
bridge engineering;  bridge bearing;  metal rubber;  mechanical property experiment;  seismic response
文献标志码:
A
摘要:
为测试金属橡胶支座的力学性能是否满足桥梁支座使用要求，分别通过压缩试验、转动试验和振动台试验对金属橡胶支座的力学性能展开研究。通过压缩试验获得不同荷载下支座的竖向力位移关系曲线，基于MATLAB平台对支座应力应变关系曲线拟合后求导，得到支座的切线模量，构造出切线模量的数学表达式，并以此为基础推导出支座竖向刚度竖向力的计算公式；考虑支座竖向应力，对金属橡胶支座进行转动性能试验，获得支座的转动力矩转角关系曲线；对采用金属橡胶支座的桥梁模型进行振动台试验，得到模型各主要测点的位移和加速度，并与采用尺寸接近的板式橡胶支座桥梁模型振动台试验结果进行比较。研究结果表明：金属橡胶支座竖向力位移关系曲线具有明显的非线性特征，金属橡胶支座的竖向承载力可以满足中小跨径公路桥梁支座的使用要求；支座的切线模量与应力为近似线性函数关系，以此为基础推导出支座刚度公式计算结果与试验结果吻合较好，提出的刚度计算公式在金属橡胶支座的初步设计时可以用来确定支座关键技术参数；转动刚度与其设计应力成线性关系，在支座设计及桥梁设计计算时需考虑竖向应力对支座转动刚度的影响；金属橡胶支座具有良好的减、隔震性能。
Abstract:
To test the mechanical properties of metal rubber bearings and assess whether they meet the requirements of bridge bearings, a compression experiment, rotation experiment, and a shaking table test were studied. The vertical force and displacement curve of the bearings was obtained through the compression experiment under different loads. The relationship between the tangent modulus was obtained by fitting and deriving the stress and strain curve using the MATLAB platform. The mathematical expression of the tangent modulus was constructed，and based on this, the computational formula of the bearings for the vertical stiffness and force was deduced. Considering the bearing vertical stress, metal rubber bearing rotational experiments were performed to obtain the rotational moment and angle curve of the bearings. Shaking table tests were conducted on the bridge models with metal rubber bearings, the displacement and acceleration of each important point were obtained, and the results were compared to those of laminated rubber bearings， whose dimensions were similar to those of the metal rubber bearings. The results show that the vertical force and displacement relationship curve of the metal rubber bearings have obvious nonlinear characteristics. The vertical capacity of the metal rubber bearings can meet the service requirements of smallspan and mediumspan highway bridge bearings. The tangent modulus of the bearing is an approximately linear function related to stress and the calculation formula of the vertical stiffness agrees well with the experimental results. The stiffness calculation formula can be used to determine the key technical parameters of the metal rubber bearings in the initial design. The rotational stiffness of the bearings is linear with its design stress, The influence of vertical stress on the rotational stiffness of the bearing should be considered in the design and calculation of bearing and bridge. Metal rubber bearings have good damping and vibration isolation performance. 3 tabs, 15 figs, 25 refs.

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更新日期/Last Update: 2019-07-29