三角托架不同支承形式下的受力行为分析  

Analysis of Stress Behavior of Triangular Brackets under Different Support Forms

作　　者：罗华平[1] 任秋菊 Luo Huaping;Ren Qiuju(Sichuan Highway and Bridge Construction Group Co.,Ltd.,Chengdu,Sichuan 610000)

机构地区：[1]四川公路桥梁建设集团有限公司,四川成都610000

出　　处：《现代工程科技》2024年第15期13-16,共4页Modern Engineering Technology

摘　　要：探讨了桥梁施工中关键部件三角托架的受力特征,重点分析了不同支承形式对其受力影响。研究发现,安装间隙会显著改变托架受力行为,给结构带来不确定性影响。为保证结构的安全性与经济性,设计时应按单支点模式计算支反力,确定连墙剪力件承载力,并选定最不利受力情况下的构件截面。提出了一种消除安装间隙影响的“下单支点”托架布设方式。该方式受力明确、简洁可靠,降低了安装精度要求,便于施工和转运。Explored the stress characteristics of key components such as triangular brackets in bridge construction,with a focus on analyzing the influence of different support forms on their stress.Research has found that installation gaps can significantly alter the load-bearing behavior of the bracket,bringing uncertainty to the structure.To ensure the safety and economy of the structure,the support reaction force should be calculated according to the single pivot mode during design,the bearing capacity of the connecting wall shear members should be determined,and the component section under the most unfavorable stress condition should be selected.Finally,a"single support point"bracket layout method was proposed to eliminate the influence of installation gaps.This method has clear force distribution,is simple and reliable,reduces installation accuracy requirements,and is convenient for construction and transportation.

关 键 词：三角托架 支承形式 受力行为 

分 类 号：U441[建筑科学—桥梁与隧道工程]