泰州长江公路大桥振动台试验——试验设计及抗震结构体系试验结果分析

发布时间：2018-07-09 10:45

本文选题：振动台试验 + 相似比　；参考：《东南大学学报(自然科学版)》2014年02期

【摘要】：为了研究大跨多塔悬索桥合理抗震体系,以泰州长江公路大桥为背景,设计并制作了1∶40缩尺比例模型,进行了全桥振动台模型试验.通过改变中塔与主梁间的连接方式,建立了无约束体系、阻尼器体系和弹性索体系等3个试验模型,并分别测试了其全桥地震反应.试验结果表明,利用白噪声对结构进行扫频,可以识别3种纵向约束体系的一阶频率和阻尼比.与纵向无约束体系相比,阻尼器体系和弹性索体系能够不同程度地减小塔顶位移和塔、梁相对位移.阻尼器体系可以更均衡地限制在场地人工波激励下中塔和边塔处的塔、梁相对位移;而弹性索体系限制中塔处塔、梁相对位移的能力更优.研究结果对大跨多塔悬索桥抗震设计具有一定的参考价值.
[Abstract]:In order to study the reasonable aseismic system of long-span multi-tower suspension bridge, a 1:40 scale model was designed and made based on Taizhou Yangtze River Highway Bridge, and the shaking table model test of the whole bridge was carried out. By changing the connection mode between the middle tower and the main beam, three test models, unconstrained system, damper system and elastic cable system, were established, and the seismic responses of the whole bridge were measured. The experimental results show that the first order frequency and damping ratio of three longitudinal constrained systems can be identified by using white noise to sweep the frequency of the structure. Compared with the longitudinal unconstrained system, the damper system and the elastic cable system can reduce the tower top displacement and the relative displacement of the tower and beam to some extent. The damper system can more evenly limit the relative displacement of the tower at the middle tower and the side tower under the field artificial wave excitation, while the elastic cable system can limit the tower at the middle tower better than the elastic cable system. The research results have certain reference value for the seismic design of long span multi-tower suspension bridge.
【作者单位】：同济大学土木工程防灾国家重点实验室;
【基金】：“十一五”国家科技支撑计划资助项目(2009BAG15B01) 国家自然科学基金资助项目(51278372) 国家重点基础研究发展计划(973计划)资助项目(2013CB036302)
【分类号】：U448.25;U446;U442.55

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