波形钢腹板组合刚构桥内衬混凝土受力分析  

Stress Analysis of Encased Concrete of Composite Rigid Frame Bridge with Corrugated Steel Webs

作　　者：乔新宇[1] 王耀军 柴亮 QIAO Xin-yu;WANG Yao-jun;CHAI Liang(CCCC First Highway Consultants Co.Ltd.,Xi'an 710075,China;CCCC Infrastructure Maintenance Group Co.Ltd.,Beijing 10001l,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075 [2]中交基础设施养护集团有限公司,北京市100011

出　　处：《公路》2025年第1期267-272,共6页Highway

摘　　要：为了研究波形钢腹板组合梁桥中内衬混凝土的受力性能,建立了某黄土地区的波形钢腹板组合刚构桥三维有限元模型,分析了内衬混凝土在实桥中的受力情况,通过改变内衬混凝土厚度和长度,研究了内衬厚度对剪力分担比的影响,以及内衬长度对桥梁挠度和顶板预加力的影响。研究结果表明,恒载作用下内衬混凝土均处于纵向受压状态,最前端处于竖向受拉状态;内衬混凝土可分担65%~90%的剪力,随着内衬厚度的增加,剪力分担比逐渐增大;增大内衬混凝土长度可减小桥梁跨中下挠,但减小程度有限;随着内衬混凝土长度增加,顶板预压应力逐渐减小。In order to study the mechanical performance of the encased concrete of composite bridge with corrugated steel webs,the finite element model of a typical composite rigid frame bridge in a certain loess area with corrugated steel webs is established.The stress of the encased concrete is analyzed,the influence of the thickness and length of the encased concrete on the shear sharing ratio,the bridge deflection and the prestressing efficiency are studied.The results indicate that:under the action of dead load,the encased concrete is in the state of compression in longitudinal,and free end is in the state of tension in vertical;the encased concrete shares 65%~90%of the shear force,and with the increase of the encased thickness,the shear force sharing ratio increases gradually;increasing the length of encased concrete can reduce the midspan deflection of bridge,but the reduction degree is limited;and as the length of encased concrete increases,the pre-compression stress of the top slab decreases gradually.

关 键 词：桥梁工程 组合刚构桥 黄土地区 波形钢腹板 内衬混凝土 

分 类 号：U448.216[建筑科学—桥梁与隧道工程] U441.5[交通运输工程—道路与铁道工程]