设置形状优化复合金属阻尼器的双柱式桥梁抗震设计及性能评估  

Seismic Design and Performance Evaluation of Double-column Bridge with Shape-optimized Composite Metallic Yielding Dampers

作　　者：王严信 孙治国[2] 王家琛 门进杰[1] 陈笑宇 王东升 WANG Yan-xin;SUN Zhi-guo;WANG Jia-chen;MEN Jin-jie;CHEN Xiao-yu;WANG Dong-sheng(School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China;Hebei Technology Innovation Center for Multi-Hazard Resilience and Emergency Handling of Engineering Structures,Institute of Disaster Prevention,Beijing 101601,China;School of Civil Engineering,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China;School of Civil and Transporting Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]防灾科技学院河北省工程结构多灾害韧性与应急处置技术创新中心,北京101601 [3]西安石油大学土木工程学院,陕西西安710065 [4]河北工业大学土木与交通学院,天津300401

出　　处：《中国公路学报》2025年第1期173-186,共14页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(52378493);河北省自然科学基金项目(E2023512002);河北省重点研发计划项目(21375405D)。

摘　　要：为改善仅设置板式橡胶支座(Laminated Rubber Bearing, LRB)的双柱式桥梁的抗震能力,提出一种设置可更换形状优化复合金属阻尼器(Shape-optimized Composite Metallic Yielding Damper, SCMYD)的支座连接体系。通过对SCMYD-LRB体系的力学性能进行分析,给出设置SCMYD的桥梁结构抗震设计方案。建立设置SCMYD-LRB体系的双柱式桥梁结构横桥向抗震数值分析模型,并验证其准确性。最后基于双地震动强度参数的概率损伤分析方法对设置SCMYD-LRB体系的桥梁结构进行地震易损性评估。结果表明:横桥向地震作用下,桥梁的损伤集中于支座与挡块;与仅设置LRB的桥梁相比,设置了SCMYD-LRB体系的桥梁中支座和挡块的损伤程度显著降低。无论是设置SCMYD-LRB体系还是仅设置LRB的桥梁,桥墩基本处于轻微和中等损伤状态,严重损伤的超越概率均小于3%。合理的设置SCMYD,在保障桥墩不发生严重破坏的同时,可明显减小主梁横桥向落梁的风险。To improve the seismic performance of double-column bridges with laminated rubber bearings(LRBs),a novel bearing connection system using a replaceable shape-optimized composite metallic yielding damper(SCMYD)was proposed.The mechanical behavior of the SCMYD-LRB system was analyzed,and a seismic design scheme for bridge structures with SCMYD was proposed.Subsequently,a numerical analysis model for the seismic performance of a double-column bridge in the transverse direction using the SCMYD-LRB system was established,and the accuracy of the model was verified.Finally,a seismic fragility analysis of the bridge using the SCMYD-LRB system was conducted using a probabilistic damage analysis method based on dual seismic intensity parameters.The results indicate that the damage would concentrate on the bearings and shear keys of the bridges under the transverse seismic action.Compared with the bridge equipped only with LRB,the damage to the bearings and shear keys would clearly decrease for the bridge with the SCMYD-LRB system.Regardless of whether the SCMYD-LRB system or only LRBs were applied to the bridge structure,the piers were primarily in a state of slight and moderate damage,with the probability of exceeding severe damage being less than 3%.The reasonable setting of SCMYD ensured that the bridge piers were not severe damage and significantly reduced the risk of the main beam falling damage in the transverse direction of the bridge.

关 键 词：桥梁工程 双柱式桥梁 形状优化复合金属阻尼器 SCMYD-LRB体系 近断层地震动 双地震动强度参数 损伤超越概率 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]