[1]周敉,刘阳,赵威.地震作用下采用UHPC铺装钢箱梁斜拉桥阻尼器参数优化[J].长安大学学报(自然科学版),2021,41(2):89-101.
　ZHOU Mi,LIU Yang,ZHAO Wei.Damper parameter optimization of steel box girder cablestayedbridge with UHPC pavement under earthquake[J].Journal of Chang’an University (Natural Science Edition),2021,41(2):89-101.
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地震作用下采用UHPC铺装钢箱梁斜拉桥阻尼器参数优化()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第41卷
期数:
2021年2期
页码:
89-101
栏目:
桥梁与隧道工程
出版日期:
2021-03-15

文章信息/Info

Title:
Damper parameter optimization of steel box girder cablestayedbridge with UHPC pavement under earthquake
作者:
周敉; 刘阳; 赵威
（1. 长安大学 公路学院，陕西 西安 710064; 2. 长安大学 旧桥检测与加固技术交通行业重点实验室，陕西 西安 710064； 3. 中交第二公路勘察设计研究院有限公司，湖北 武汉 430056）
Author(s):
ZHOU Mi1; 2;  LIU Yang1; 2;  ZHAO Wei3
(1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Key Laboratory for OldBridge Detection and Reinforcement Technology of the Ministry of Transportation, ChanganUniversity, Xian 710064, Shaanxi, China; 3. CCCC Second Highway Survey andDesign Institute Co., Ltd., Wuhan 430056, Hubei, China)
关键词:
桥梁工程; 抗震; 阻尼器参数; 敏感性分析; UHPC铺装; 约束体系
Keywords:
bridge engineering;  seismic;  damper parameter;  sensitivity analysis;  UHPC pavement;  restraint system
文献标志码:
A
摘要:
为探究采用UHPC铺装的大跨径钢箱梁斜拉桥的结构自重增加对桥梁地震响应的影响，并为其选用合理的约束体系，优化减隔震装置参数。以Ⅷ度区的榕江特大桥为研究对象，采用CSI Bridge有限元分析软件构建了全桥有限元分析模型，开展不同约束体系下桥梁结构地震响应的对比分析，并对纵向设置黏滞阻尼器的最优约束体系进行参数优化；建立地震作用下结构关键截面处地震响应与阻尼器参数间的非线性关系，基于敏感性分析确定阻尼器参数的合理取值。研究结果表明：采用UHPC铺装的大跨径钢箱梁斜拉桥，在地震作用下其塔、墩关键截面处的弯矩、剪力、位移响应值均较采用沥青混合料铺装时的响应值有一定的提高；通过在塔梁间设置阻尼器，可以有效减小由于钢UHPC组合桥面结构重量增加对桥梁抗震性能带来的不利影响；分析阻尼器参数变化对地震作用下桥梁结构内力响应和位移响应的影响，可看出阻尼系数对其影响占主导地位，速度指数相对较弱。对比各阻尼器参数工况下桥梁结构的地震响应值，最终选定该桥梁结构的黏滞阻尼器参数分别为阻尼系数C=3 000、速度指数α=0.3。该研究可为高烈度地震区相似桥梁结构的约束体系选取及阻尼器参数优化提供参考。
Abstract:
In order to explore the influence of increasing dead weight of longspan steel box girder cablestayed bridge with UHPC pavement on seismic response, and further select reasonable restraint system and optimize the parameters of shock absorption and isolation device, the Rongjiang Bridge in the Ⅷ degree area was taking as the research object, the full bridge finite element analysis model was established by using the CSI Bridge finite element analysis software, and the comparative analysis of the bridge structure seismic response under different restraint systems was carried out. The parameter optimization of the restraint system with the longitudinal viscous dampers was carried out, the nonlinear relationship between the seismic response of the key section of the structure under the earthquake action and the damper parameters was established, and the reasonable values of the damper parameters were determined based on the sensitivity analysis. The results show that the steel box girder cablestayed bridge with UHPC pavement has better response values of bending moment, shear force and displacement at the key sections of the tower and pier under the action of earthquake than that of asphalt paving, and the negative influence of the weight of steelUHPC composite deck structure on the seismic performance of the bridge can be effectively reduced by installing dampers between the towers and beams. By analyzing the influence of damper parameters on the internal force response and displacement response of bridge structure under earthquake, it can be seen that the influence of damping constant is dominant, and the velocity index is relatively weak, by comparing the seismic response of the bridge structure under different damper parameters, the viscous damper parameters of the bridge structure are selected as follows, damping constant C=3 000, velocity index α=0.3, it can provide a reference for the selection of restraint system and the optimization of damper parameters of similar bridge structures in high intensity seismic region. 5 tabs, 26 figs, 30 refs.

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更新日期/Last Update: 2021-04-02