箱梁桥在梁格法下不同建模方式差异分析  

DIFFERENCE ANALYSIS OF BOX GIRDER BRIDGE BY DIFFERENT MODELING APPROACHES UNDER BEAM LATTICE METHOD

作　　者：张亚欣 林斌[1] ZHANG Yaxin;LIN Bin(Anhui University of Science and Technology,School of Civil Architecture,Anhui Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《低温建筑技术》2023年第12期98-101,共4页Low Temperature Architecture Technology

摘　　要：目前梁格法在分析箱梁结构存在的问题时,由于纵向梁格划分方式、虚拟横梁划分方式以及荷载大小的加载等方面对计算精度的具体影响还无法完全确定,因此需要对计算精度影响进一步分析研究。文中以某20m简支箱梁桥为例,对梁格法模型的纵向梁格划分方式、横梁模拟方法及不同荷载工况进行对比分析,观察梁格法模型在不同的情况下精度差异大小。结果表明文中梁格法的横向虚拟梁格划分方式对支座反力和桥梁挠度的计算精度差异不大,纵向梁格划分方式对支座反力的计算精度差异较大,可为相关工程采用梁格法时提供参考。At present,the beam lattice method is used to analyze the problems existing in the box girder structure.However,because of the longitudinal beam grid division,virtual beam division and load size loading and other as⁃pects of the specific impact on the accuracy of the calculation cannot be fully determined.Therefore,it is necessary to further analyze and study the influence of calculation accuracy.Taking a 20m simply supported box girder bridge as the case,the longitudinal beam grid division method,beam simulation method,and different load conditions are compared and analyzed to determine the accuracy difference of the beam-lattice model under different conditions.The results show that the transverse virtual beam grid method has little difference in the calculation accuracy of sup⁃port reaction and bridge deflection.The calculation accuracy of the reaction force of the support varies greatly by the method of longitudinal beam lattice division,which may provide the reference for the use of beam lattice method in related engineering.

关 键 词：梁格法 纵向梁格划分 横向虚拟横梁 箱型截面梁 

分 类 号：TU311.4[建筑科学—结构工程]