梁桥HDR支座的优化配置及抗震效能分析
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摘要
以吴定高速中4×50m连续梁桥为实例,对不同组合高阻尼橡胶支座的隔震效果进行研究,为梁式桥高阻尼橡胶支座的配置方案提供设计依据。结合超越概率水平为40%、10%、2%的地震波对结构进行动力时程分析,对比了高阻尼橡胶支座与板式橡胶支座隔震效果的差异,探讨了过渡墩处设置滑动式支座对桥梁地震响应的影响。研究结果表明,高阻尼橡胶支座比板式橡胶支座的隔震效果更好;过渡墩处采用滑动支座会削弱过渡墩的地震分担比,而滑动支座的位移量远超过连续墩处,使得全桥各墩的荷载分配不均。全桥均采用高阻尼橡胶支座时过渡墩及连续墩的荷载分担比相对合理,且高阻尼橡胶支座能够在地震中发挥较好的减震耗能作用。
In order to provide design consideration of high-damping rubber bearing for beam bridges,the damping and isolation effect of bearing with different combination are studied. Dynamic time-history analysis is carried out by earthquake waves with exceeding probability to be 40 percent,10 percent and 2 percent. The damping and isolation effect of high-damping rubber bearing and laminated rubber bearing are contrasted,and the influence for seismic responses of bridge caused by sliding bearing set on transitional pier is discussed. The research result shows that the damping and isolation effect of high-damping rubber bearing is better than laminated rubber bearing. The sliding bearings set on transitional piers could weak the load sharing percent of transitional piers,the displacement of sliding bearings are much more lager than the high-damping rubber bearings set on continuous piers,so that the load distribution of piers is nonuniform. The load sharing percent is much more reasonable when high-damping rubber bearings are set on all the piers,the high-damping rubber bearings have obviously damping and isolation effect,and the dynamical response of bridge is greatly decreased when earthquake occurs.
In order to provide design consideration of high-damping rubber bearing for beam bridges,the damping and isolation effect of bearing with different combination are studied. Dynamic time-history analysis is carried out by earthquake waves with exceeding probability to be 40 percent,10 percent and 2 percent. The damping and isolation effect of high-damping rubber bearing and laminated rubber bearing are contrasted,and the influence for seismic responses of bridge caused by sliding bearing set on transitional pier is discussed. The research result shows that the damping and isolation effect of high-damping rubber bearing is better than laminated rubber bearing. The sliding bearings set on transitional piers could weak the load sharing percent of transitional piers,the displacement of sliding bearings are much more lager than the high-damping rubber bearings set on continuous piers,so that the load distribution of piers is nonuniform. The load sharing percent is much more reasonable when high-damping rubber bearings are set on all the piers,the high-damping rubber bearings have obviously damping and isolation effect,and the dynamical response of bridge is greatly decreased when earthquake occurs.
引文
[1]王克海,孙永红,韦韩,等.汶川地震后对我国结构工程抗震的几点思考[J].公路交通科技,2008,25(11):54-59Wang Ke-hai, Sun Yong-hong, Wei Han, et al.Comments on seismic strengthening for structural engineering in China after Wenchuan earthquake[J].Journal of Highway and Transportation Research and Development,2008,25(11):54-59(in Chinese)
[2]邵长江,房麟,钱永久.基于高阻尼橡胶支座的混凝土连续梁桥减隔震性能[J].公路交通科技,2015,32(10):57-61Hao Chang-jiang,Fang Lin, Qian Yong-jiu. Seismic isolation performance of concrete continuous girder bridge based on high damping rubber bearings[J].Journal of Highway and Transportation Research and Development,2015,32(10):57-61(in Chinese)
[3]庄学真,沈朝勇,金建敏.桥梁高阻尼橡胶支座力学性能研究[J].地震工程与工程振动,2006,26(5):208-212Zhuang Xue-zhen, Shen Chao-yong, Jin Jian-min.Experimental study on mechanical property of high damping rubber bearing for bridge[J]. Earthquake Engineering and Engineering Vibration,2006,26(5):208-212(in Chinese)
[4]贺锃,宋旭明,凌意,等. HDR在曲线箱梁桥中的适用性研究[J].铁道科学与工程学报. 2016,13(11):2081-2188He Zeng,Song Xu-ming,Ling Yi,et al. Applicability study of high damping rubber bearing in curved box girder[J]. Journal of Railway Science and Engineering,2016,13(11):2081-2188(in Chinese)
[5]张煜敏,王凌波.连续梁桥HDR支座的优化配置及减隔震效果研究[J].公路工程,2018,43(4):27-31+61Zhang Yu-min,Wang Ling-bo. Research on optimal allocation and seismic isolation effect of HDR bearing for continuous beam bridge[J]. Highway Engineering,2018,43(4):27-31+61(in Chinese)
[6] Mahmoud S,Austrell P E,Jankowski R. Simulation of the response of base-isolated buildings under earthquake excitations considering soil flexibility[J]. Earthquake Engineering and Engineering Vibration. 2012,11:359-374
[7] Yamamoto K, Fujita I and Takewaki. Instantaneous earthquake input energy and sensitivity in base-isolated building[J]. The Structural Design of Tall and Special Buildings,2011,20(6):631-648.
[8]袁涌,朱昆,熊世树,资道铭.高阻尼橡胶隔震支座的力学性能及隔震效果研究[J].工程抗震与加固改造,2008(3):15-20Yuan Yong, Zhu Kun, Xiong Shi-shu, et al.Experimental study on characteristics and isolator effect of high-damping rubberbearing[J].Earthquake Resistant Engineering and Retrofitting,2008,30(3):15-20(in Chinese)
[9]张煜敏,王卫山,王维荣.公路梁桥高阻尼橡胶支座优化配置研究[J].科学技术与工程,2017,17(33):173-181Zhang Yu-min, Wang Wei-shan, Wang Wei-rong.Optimal configuration of high damping rubber bearing for highway beam bridge[J]. Science Technology and Engineering,2017,17(33):173-181(in Chinese)
[10]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001
[2]邵长江,房麟,钱永久.基于高阻尼橡胶支座的混凝土连续梁桥减隔震性能[J].公路交通科技,2015,32(10):57-61Hao Chang-jiang,Fang Lin, Qian Yong-jiu. Seismic isolation performance of concrete continuous girder bridge based on high damping rubber bearings[J].Journal of Highway and Transportation Research and Development,2015,32(10):57-61(in Chinese)
[3]庄学真,沈朝勇,金建敏.桥梁高阻尼橡胶支座力学性能研究[J].地震工程与工程振动,2006,26(5):208-212Zhuang Xue-zhen, Shen Chao-yong, Jin Jian-min.Experimental study on mechanical property of high damping rubber bearing for bridge[J]. Earthquake Engineering and Engineering Vibration,2006,26(5):208-212(in Chinese)
[4]贺锃,宋旭明,凌意,等. HDR在曲线箱梁桥中的适用性研究[J].铁道科学与工程学报. 2016,13(11):2081-2188He Zeng,Song Xu-ming,Ling Yi,et al. Applicability study of high damping rubber bearing in curved box girder[J]. Journal of Railway Science and Engineering,2016,13(11):2081-2188(in Chinese)
[5]张煜敏,王凌波.连续梁桥HDR支座的优化配置及减隔震效果研究[J].公路工程,2018,43(4):27-31+61Zhang Yu-min,Wang Ling-bo. Research on optimal allocation and seismic isolation effect of HDR bearing for continuous beam bridge[J]. Highway Engineering,2018,43(4):27-31+61(in Chinese)
[6] Mahmoud S,Austrell P E,Jankowski R. Simulation of the response of base-isolated buildings under earthquake excitations considering soil flexibility[J]. Earthquake Engineering and Engineering Vibration. 2012,11:359-374
[7] Yamamoto K, Fujita I and Takewaki. Instantaneous earthquake input energy and sensitivity in base-isolated building[J]. The Structural Design of Tall and Special Buildings,2011,20(6):631-648.
[8]袁涌,朱昆,熊世树,资道铭.高阻尼橡胶隔震支座的力学性能及隔震效果研究[J].工程抗震与加固改造,2008(3):15-20Yuan Yong, Zhu Kun, Xiong Shi-shu, et al.Experimental study on characteristics and isolator effect of high-damping rubberbearing[J].Earthquake Resistant Engineering and Retrofitting,2008,30(3):15-20(in Chinese)
[9]张煜敏,王卫山,王维荣.公路梁桥高阻尼橡胶支座优化配置研究[J].科学技术与工程,2017,17(33):173-181Zhang Yu-min, Wang Wei-shan, Wang Wei-rong.Optimal configuration of high damping rubber bearing for highway beam bridge[J]. Science Technology and Engineering,2017,17(33):173-181(in Chinese)
[10]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001