负载对某钢结构电视塔焊接加固的影响分析  

Influence of Loads on Steel TV Towers with Welded Reinforcement

作　　者：贺然 李欣 He Ran;Li Xin(Radio,Film and Television Design and Research Institute Co.,Ltd.,Beijing 100045,China)

机构地区：[1]中广电广播电影电视设计研究院有限公司,北京100045

出　　处：《特种结构》2024年第3期66-71,共6页Special Structures

摘　　要：为研究负载对某钢结构电视塔焊接加固的影响,利用midas Gen软件中的施工阶段分析功能,分别建立整体梁单元模型及多尺度模型,考虑卸载加固及负载加固两种情况,得到不同初始负载下的构件极限承载力、整体模型中构件的应力大小、分布及结构位移。计算结果表明,随着初始负载的增大,构件极限承载力变化不大,但整体模型中原构件受力增大,加固构件受力减小,加固效率降低。故进行加固设计时,应考虑初始负载的影响,可采用施工阶段分析辅助设计;焊接施工应在较小的风速下进行,保证原构件及加固构件能协同工作。To investigate the impact of loads on a steel structure TV tower with welded reinforcement,the construction stage analysis feature in midas Gen software is utilized to create both an overall beam element model and a multiscale model.Two scenarios,reinforcing after unloading and reinforcing with loading,are consid-ered.The ultimate capacity,stress size,stress distribution and structural displacement under different initial loads are obtained.The results indicate that the variation in ultimate capacity is minimal as the initial load in-creases.However,in the overall model,the existing members experience increased forces,while the reinforcing members experience reduced forces,leading to decreased reinforcement efficiency.Therefore,it is essential to consider the influence of initial loads during reinforcement design.Construction stage analysis serves as a valua-ble tool to assist in this process.Additionally,it is recommended that the welding construction should be per-formed during lower wind speeds to ensure effective collaboration between the existing members and reinforcing members.

关 键 词：钢结构电视塔 负载 焊接加固 施工阶段分析 

分 类 号：TU279.7[建筑科学—建筑设计及理论]