正交异性钢箱梁桥面结构体系优化设计  

Optimization Design of Orthotropic Steel Box Girder Bridge Deck Structural System

作　　者：黄炬银 HUANG Juyin(China Railway 21st Bureau Group Co.Ltd.,Lanzhou Gansu 730070,China)

机构地区：[1]中铁二十一局集团有限公司,甘肃兰州730070

出　　处：《铁道建筑技术》2025年第2期89-92,共4页Railway Construction Technology

摘　　要：正交异性钢桥面板具有独特的刚度分布和复杂的力学特性,导致桥面铺装层在实际工程中频繁出现开裂现象。为提高桥面结构服役年限,避免钢桥面板和桥面铺装裂缝的产生,以某正交异性钢箱梁桥为研究对象,采用Midas Civil建立有限元模型。以顶板厚度、U肋高度及厚度和开口宽度为控制变量,以纵梁的最大正、负弯矩和纵肋梁顶、梁底的最大拉压应力为约束条件,探讨正交异性钢箱梁桥面板在第二结构体系下的力学响应。通过优化设计,确定出正交异性钢箱梁桥面板各参数的合理取值范围,为同类钢箱梁桥面板设计提供参考。The orthotropic steel bridge deck has a unique stiffness distribution and complex mechanical properties,leading to frequent cracking of the deck pavement in practice.To enhance the service life of the deck structure and prevent the occurrence of cracks in steel bridge decks and bridge deck pavements,this study focuses on a specific orthotropic steel box girder bridge,using Midas Civil to create a finite element model.In this paper,the thickness of the top place,the height and thickness of the U-ribs,and the width of the openings at the top of the U-ribs were considered as control variables.The maximum positive and negative bending moments of the longitudinal beams,along with the maximum tensile and compressive stresses at the top and bottom of the longitudinal ribs,are set as restraint conditions.The study examines the mechanical response of the Orthotropic steel box girder bridge deck under the second structural system.By optimizing the design,the reasonable range of parameters for the orthotropic steel box girder bridge deck is determined,providing reference for the design of similar steel box girder bridge decks.

关 键 词：正交异性 钢桥面板 第二结构体系 约束条件 有限元模型 体系优化 

分 类 号：U441.5[建筑科学—桥梁与隧道工程] U448.213[交通运输工程—道路与铁道工程]