单索面矮塔斜拉桥W形斜拉杆箱梁敏感性分析  

Sensitivity analysis of W-shaped stay cable box girder in single plane low-pylon cable-stayed bridge

作　　者：陈黎 占雪芳[1] 赵怡彬 唐必刚 黄聃 Chen Li;Zhan Xuefang;Zhao Yibin;Tang Bigang;Huang Dan(School of Civil Engineering,Central South University of Foresty&Technology,Changsha Hunan 410004,China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410004

出　　处：《山西建筑》2025年第10期118-122,共5页Shanxi Architecture

基　　金：湖南省交通运输厅科技进步与创新项目(项目编号:202309);湖南省教育厅优秀青年项目(项目编号:23B0243)。

摘　　要：为研究影响单索面矮塔斜拉桥W形斜拉杆箱梁受力性能的主要参数,以某大跨度矮塔斜拉桥为研究对象,采用ABAQUS软件建立其某节段带W形斜拉杆箱梁的有限元模型,以箱梁索梁锚固区斜拉杆与锚固块连接处主应力为主控因素,从混凝土抗压强度、钢筋抗拉强度、主梁重量、钢筋锈蚀、预应力损失、车辆超载和预应力筋偏位等主要参数分析了对其受力性能的影响。研究结果表明:钢筋抗拉强度、主梁重量、钢筋锈蚀和预应力损失均显著影响斜拉杆与锚固块连接处主应力,较大的主拉应力导致其裂缝开展;但混凝土强度、车辆超载及预应力筋偏位对斜拉杆与锚固块连接处的主应力影响较小,不会在该位置出现开裂现象。This study investigates the primary parameters influencing the mechanical performance of W-shaped cable-stayed box girder in a single plane low-pylon cable-stayed bridge.Focusing on a large-span single plane low-pylon cable-stayed bridge,we established a finite element model of a segment featuring W-shaped cable-stayed box girder using ABAQUS.The principal stress at the connection between the cable-stayed box girder and the anchorage block in the box girder-sleeve anchorage area was considered the key controlling factor.Our analysis included the effects of concrete compressive strength,reinforcement tensile strength,main girder weight,reinforcement corrosion,prestress loss,vehicle overload,and misalignment of prestressed tendons on the mechanical behavior of this structure.The results show that reinforcement tensile strength,main girder weight,reinforcement corrosion,and prestress loss significantly impact the principal stress at the connection between the cable stay and the anchorage block,with higher tensile stresses leading to crack propagation in this region.Conversely,the influence of concrete strength,vehicle overload,and misalignment of prestressed tendons on the principal stress at the cable stay-anchorage block interface is minimal,suggesting that cracking is less likely to occur due to these factors.

关 键 词：单索面矮塔斜拉桥 箱梁 W形斜拉杆 敏感性分析 有限元 

分 类 号：TU997[建筑科学—市政工程] U448.27[建筑科学—桥梁与隧道工程]