摘要
某大跨钢结构厂房采用钢框架结构体系,在施工建造过程中,其一层钢梁挠度超过GB 50017—2017《钢结构设计标准》中挠度限值。为满足施工及后续使用要求,需对结构一层钢框梁进行加固。通过对加固前、后顶升钢梁的计算及现场顶升过程的监测,对比分析加固前、后的结构受力及变形。结果表明:钢梁的变形过大是设计、施工等多方面造成的;设计的顶升装置能较好地实现钢梁顶升,并且钢框梁的加固顶升方案合理;钢框梁加固顶升后,能满足现有的吊车梁通行需求,结构安全可靠,顶升加固方案安全经济。
A long-span steel plant was adopted a steel frame structure system. Under the construction, the deflection of steel beams on the first floor exceeded the limit of Standard for Classification of Steel Structures(GB 50017—2017). In order to meet the requirements of construction and subsequent use, it was necessary to strengthen the steel beams on the first floor of the structure. Through the calculation of the jacked steel beams and the monitoring of the on-site jacking process before and after reinforcement, the comparison and analysis of the structural stress and deformation before and after reinforcement showed that the excessive deformation of the steel beams was due to many reasons such as design and construction. The designed jacking devices could well realize the jacking of steel beams, and the reinforcement scheme for the jaking of steel beams was reasonable. After the steel beams were strengthened and jacked, the traffic demand of the existing crane beam was met, the structure became safe and reliable, which proved that the reinforcement scheme for lifting was safe and economical.
作者
马云龙
王秀丽
冯竹君
苟宝龙
侯鸿杰
MA Yunlong;WANG Xiuli;FENG Zhujun;GOU Baolong;HOU Hongjie(Gansu Construction Investment Civil Engineering Construction Group Co.,Ltd.,Lanzhou 700070,China;Lanzhou University of Technology,School of Civil Engineering,Lanzhou 730050,China;Western Center of Disaster Mitigation of Ministry of Education,Lanzhou 730050,China)
出处
《工业建筑》
CSCD
北大核心
2021年第11期205-210,共6页
Industrial Construction
基金
国家自然科学基金项目(51778273)
甘肃省建设科技攻关项目(JK2020-26)。
关键词
钢结构厂房
大跨度钢梁
变形控制
顶升加固
现场实测
steel plant
long-span steel beam
deformation control
reinforcement for jacking
field measurement
