基于多尺度模型的空间Y型拱桥抗震性能分析  

Seismic performance analysis of a spatial Y-shaped arch bridge based on the multi-scale modelling

作　　者：韩强[1] 王朝进 吴睿麒 高鑫崇 许坤 王利辉[1] HAN Qiang;WANG Zhaojin;WU Ruiqi;GAO Xinchong;XU Kun;WANG Lihui(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;Beijing General Municipal Engineering Design&Research Institute Co.,Ltd,Beijing 100082,China;China Railway Engineering Design and Consulting Group Co.,Ltd,Beijing 100082,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京市市政工程设计研究总院有限公司,北京100082 [3]北京市城市桥梁安全保障工程技术研究中心,北京100082

出　　处：《世界地震工程》2023年第3期183-193,共11页World Earthquake Engineering

基　　金：北京市教育委员会项目(DHT20190504)。

摘　　要：对建造在高烈度区大跨度桥梁,其抗震安全性分析是桥梁设计中重要环节,特别是对结构复杂的异形空间桥梁体系。杆系模型计算效率较高,但不能反映关键构件局部受力和变形;局部构件的边界条件确定困难,而且难以准确模拟荷载传递过程,不能满足实际工程需要,而多尺度模型为兼顾计算精度和效率提供了可能。本文基于多尺度模型和杆系模型的方法,对大跨度空间Y型拱桥的动力特性进行分析,验证了桥梁多尺度建模方法的精确性与可靠性;在此基础上,开展大跨度空间Y型拱桥结构地震反应分析,探讨了大跨度拱桥地震响应规律以及关键构件局部受力和变形特征,对其抗震性能进行合理评估。In highly seismic region,seismic performance analysis is considered as an essential part in the anti-seismic design of long-span Bridges in highly seismic region,especially for the complex special-shaped spatial one.Although the frame model has higher computational efficiency,it cannot reflect the stress and deformation of key components.Besides,it is difficult to determine boundary conditions of local members and simulate the load transfer process in an accurate way,which fails to meet the needs of practical engineering.However,the multi-scale model can perfectly balance the accuracy and efficiency.This paper,adopted the multi-scale model and frame model,researches the dynamic characteristics of long-span space Y-shaped arch bridge,which verifies the accuracy and reliability of employing the method of multi-scale model in the research.Besides,except for the analysis of the seismic response law,this study also discusses the stress and deformation characteristics of key components of long-span space Y-shaped arch bridge and evaluate the anti-seismic performance of the bridge on the whole.

关 键 词：异型拱桥 多尺度建模 动力特性 抗震性能 

分 类 号：TU4[建筑科学—土工工程]