摘要
针对龙门吊轨道梁在偏心荷载作用下的受力问题,进行轨道梁受力和地基沉降研究,采用弹性地基梁法和数值分析方法,得出偏心荷载作用下轨道梁的受力与地基沉降位移,与轴心受力相比,偏心荷载作用下轨道梁的上部纵筋需配面积增幅为17.08%;下部纵筋需配面积增幅为56.83%;箍筋需配增幅为16.5%。结构承载能力极限状态下,极限设计轮压为1 197.2 kN/m,是设计轮压250 kN/m的2.55倍。但设计轮压下地基变形已达到39.67 mm,逼近规范要求值,充分体现出变形控制是地基设计的主要因素。
Regarding the loads on the track beam of a gantry crane under eccentric loading, this paper investigates the loads on a track beam and foundation settlement and obtains the loads on the track beam and the settlement displacement of the foundation under eccentric loading by the elastic foundation beam method and a numerical analysis method. The conclusion is that the required areas for upper longitudinal reinforcement, lower longitudinal reinforcement, and stirrup when the track beam is under eccentric loading increase by 17.08%,56.83%,and 16.5%,respectively, compared with those in the case of axial loading. The ultimate design wheel load under the ultimate load-carrying capacity of the structure is 1 197.2 kN/m, which is 2.55 times the design wheel load of 250 kN/m. However, the deformation of the foundation under the design wheel load reaches 39.67 mm and is close to the value required by the specification, indicating that deformation control is a major factor in foundation design.
作者
胡晓东
季想
HU Xiao-dong;JI Xiang(CCCC Southwest Urban Development Co.Ltd.,Chengdu 610041,China)
出处
《水运工程》
北大核心
2023年第S02期143-146,共4页
Port & Waterway Engineering
关键词
门吊基础
弹性地基梁
数值分析
地基设计
gantry crane foundation
elastic foundation beam
numerical analysis
foundation design
