盖梁结构计算中桥面板模拟方案的研究  

Research on the Simulation of the Bridge Deck in Computing Coping

作　　者：吴乾龙 钟文香 WU Qian-long;ZHONG Wen-xiang(CCCC Highway Consultants Co.Ltd.,Beijing 100010,China)

机构地区：[1]中交公路规划设计院有限公司,北京市100010

出　　处：《公路》2024年第11期164-170,共7页Highway

摘　　要：为解决墩台盖梁计算中桥面板简化模型选择的问题,以实体元为基准模型,对基于杠杆原理法和刚性横梁法计算的盖梁活载内力的精确度进行对比研究,同时分析了简化为连续梁模型的可应用性。研究结果表明,采用多跨简支梁模拟端横梁,盖梁结构冗余度最高;采用刚性横梁模拟端横梁,仅悬臂部分活载负弯矩结果可靠,跨内内力偏差较大;采用连续梁模拟端横梁,其活载内力与基准模型吻合度较高;端横梁模拟采用矩形截面时,计算的盖梁结构冗余度增加,从经济性上出发建议采用考虑有效翼缘宽度的T形截面。To tackle selecting a simulation scheme of the bridge deck in computing coping,in the paper the accuracy of the live-load internal force of coping using traditional algorithms based on Lever Principle Method and Rigid Transverse Beam Method are compared and studied with reference model using solid finite element,and the applicability of simplifying as the continuous beam model is analyzed.The results show that the coping structure has the highest redundancy when the multi-span simply supported beam is used to simulate the end beam.When the rigid beam is used to simulate the end beam,only the cantilever part of the live load negative bending moment results are reliable,and the internal force deviation is large.The continuous beam is used to simulate the end beam,and the live load internal force is in good agreement with the reference model.When rectangular section is used in the end beam simulation,the calculated redundancy of the coping structure increases.Therefore,the T-section considering the effective flange width is recommended for economic reasons.

关 键 词：桥梁工程 盖梁计算 活载内力 桥面板 横梁 连续梁模型 

分 类 号：U443.31[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]