Numerical Simulation-Based Analysis of the Impact of Overloading on Segmentally Assembled Bridges  

作　　者：Donghui Ma Wenqi Wu Yuan Li Lun Zhao Yingchun Cai Pan Guo Shaolin Yang 

机构地区：[1]Shanghai Urban Construction and Maintenance Management Co.,Ltd.,Shanghai,200023,China [2]School of Water Conservancy and Transportation,Zhengzhou University,Zhengzhou,450001,China

出　　处：《Structural Durability & Health Monitoring》2024年第5期663-681,共19页结构耐久性与健康监测（英文）

基　　金：supported in part by the Key Research Projects of Higher Education Institutions in Henan Province(Grant No.24A560021);in part by the Henan Postdoctoral Foundation(Grant No.202102015).

摘　　要：Segmentally assembled bridges are increasinglyfinding engineering applications in recent years due to their unique advantages,especially as urban viaducts.Vehicle loads are one of the most important variable loads acting on bridge structures.Accordingly,the influence of overloaded vehicles on existing assembled bridge structures is an urgent concern at present.This paper establishes thefinite element model of the segmentally assembled bridge based on ABAQUS software and analyzes the influence of vehicle overload on an assembled girder bridge struc-ture.First,afinite element model corresponding to the target bridge is established based on ABAQUS software,and the load is controlled to simulate vehicle movement in each area of the traveling zone at different times.Sec-ond,the key cross-sections of segmental girder bridges are monitored in real time based on the force character-istics of continuous girder bridges,and they are compared with the simulation results.Finally,a material damage ontology model is introduced,and the structural damage caused by different overloading rates is compared and analyzed.Results show that thefinite element modeling method is accurate by comparing with on-site measured data,and it is suitable for the numerical simulation of segmental girder bridges;Dynamic sensors installed at 1/4L,1/2L,and 3/4L of the segmental girder main beams could be used to identify the dynamic response of segmental girder bridges;The bottom plate of the segmental girder bridge is mostly damaged at the position where the length of the precast beam section changes and the midspan position.With the increase in load,damage in the direction of the bridge develops faster than that in the direction of the transverse bridge.Thefindings of this study can guide maintenance departments in the management and maintenance of bridges and vehicles.

关 键 词：Segmentally assembled bridge dynamic response moving loads OVERLOADING structural damage finite element analysis 

分 类 号：U442[建筑科学—桥梁与隧道工程]