钢箱拱桥拱肋吊杆锚固区域力学性能数值分析  

Numerical Analysis on Mechanical Properties of Suspender Rod in Arch Rib of Steel Box Arch Bridge

作　　者：康俊涛[1] 刘开 邵光强[1] KANG Juntao;LIU Kai;SHAO Guangqiang(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《武汉理工大学学报（交通科学与工程版）》2020年第1期34-38,45,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：为确定钢箱拱桥拱肋吊杆锚固区域在吊杆拉力作用下的受力特性,运用MIDAS/CIVIL软件建立了全桥有限元模型,进行全桥静力分析,选出最不利钢箱拱肋节段,运用ABAQUS软件建立精细化节段模型,对拱肋吊杆锚固区域进行细化计算.结果表明:①钢箱拱肋节段两端承受较大的荷载,锚固区域承受拉力荷载的能力会减小约0.5%;②随着锚固区域承受吊杆拉力逐渐增大,当达到极限承载能力,锚固区域的钢板发生大变形之后,锚固区域承受吊杆拉力的能力逐渐下降;③在进行位移加载到30 mm的过程中,吊杆锚箱的两块横隔板首先达到极限强度600 MPa,并发生大变形破坏;拱肋底板处,与吊杆锚箱连接处的应力最大,为510.2 MPa,应力的大小由中心向四周扩散分布.In order to determine the stress characteristics of steel box arch bridge arch rib suspender anchorage area under the action of suspender tension,MIDAS/CIVIL software was used to establish the finite element model of the whole bridge,and static analysis of the whole bridge was carried out to select the most unfavorable rib segment of steel box arch.Using ABAQUS software,a refined segment model was established to calculate the anchorage zone of arch rib suspenders in detail.The calculation results show that:①Both ends of the rib section of the steel box arch bear a large load,and the capacity of the anchorage area to bear tensile load will be reduced by about 0.5%;②As the tension of the suspender in the anchoring area gradually increases,when the ultimate bearing capacity is reached and the steel plate in the anchoring area undergoes large deformation,the capacity of the anchoring area to bear the tension of the suspender gradually decreases;③In the process of displacement loading,the two diaphragm plates of the boom anchor box first reach the ultimate strength of 600 MPa,and large deformation and failure occurred.At the bottom of the arch rib,the stress at the joint with the suspender anchor box is the largest,510.2 MPa,and the stress is distributed from the center to the periphery.

关 键 词：钢箱拱桥 锚固区域 极限承载力 应力分布 

分 类 号：U443.35[建筑科学—桥梁与隧道工程]