公路悬索桥正交异性板钢箱梁桥面局部应力简化计算方法初步研究  

PRELIMINARY STUDY ON SIMPLIFIED CALCULATION METHOD OF DECK'S LOCAL STRESS IN ORTHOTROPIC STEEL BOX GIRDER OF HIGHWAY SUSPENSION BRIDGE

作　　者：吴臻旺[1] 郑凯锋[1] 苟超[1] 崔英杰[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《钢结构》2010年第12期17-21,共5页Steel Construction

摘　　要：选取公路悬索桥正交异性板钢箱梁典型结构,根据顶板厚度、主梁高度、横隔板间距以及吊杆纵向间距内横隔板节间数等4个参数对结构进行研究。用有限元法试算确定最不利荷载位置后,分别对各结构的节段模型进行加载计算,研究钢箱梁桥面的顶板纵向最大拉应力与最大压应力、顶板横向最大拉应力与最大压应力、纵肋纵向最大拉应力与最大压应力,并由计算结果推导出公路悬索桥正交异性板钢箱梁桥面局部应力简化计算公式,初步验证该公式具有一定的计算精度与简便性。Based on the typical structure selected,what needs to be researched was obtained according to altering such 4 parameters as deck thickness,girder height,diaphragm distance and the number of diaphragm internodes between two adjacent suspenders.By means of the finite element method,after finding the most unfavorable load positions using trial calculation,loads were applied to section models of all structures and analyzed respectively.The following items of steel box girders were studied：longitudinal and transverse maximum tensile and compressive stress of deck,and that of longitudinal ribs.In accordance with the results,a simplified formula was deduced to calculate deck＇s local stress in orthotropic steel box girder of highway suspension bridge.Considering preliminary verifications,the formula exhibited fine accuracy and applicability.

关 键 词：公路悬索桥 正交异性板钢箱梁 桥面局部应力 简化计算方法 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]