华侨大学学报（自然科学版）2024，Vol.45Issue(2)：175-185,11.DOI:10.11830/ISSN.1000-5013.202401013
预应力张弦梁钢支撑系统力学性能分析
Analysis of Mechanical Properties of Steel Support System for Prestressed String Beams
摘要
Abstract
In order to clarify the mechanical properties of the prestressed steel support system,MIDAS/GTS finite element analysis software was used to simulate the three dimensional model of the prestressed steel sup-port system and the surrounding soil.The displacement of the retaining structure,the deformation of the foun-dation pit,the deformation characteristics of the prestressed steel support system and the internal force chan-ges were obtained and compared with the monitoring data of construction site.The results show that the nu-merical simulation results of foundation pit displacement are basically consistent with the field monitoring data.Under different working conditions,the vertical displacement of the retaining structure changes little along the vertical range,the part near the corner of the foundation pit is constrained by two directions,and the area with large displacement of the retaining structure is concentrated in the middle area of the long side of the foundation pit.With the increase of excavation depth,the settlement distribution near the foundation pit shows a parabol-ic shape,and the maximum settlement occurs at the long side of the foundation pit,and the farther away from the long side of the foundation pit,the smaller the settlement value.The steel support system of prestressed string beam has uniform force and reasonable layout.The opposite steel brace and angle brace can properly withstand the horizontal earth pressure.The string beam structure can enhance the retaining structure and en-sure the safety of foundation pit engineering.关键词
围护结构/基坑/预应力张弦梁/钢支撑/有限元分析Key words
enclosure structure/foundation pit/prestressed string beam/steel support/finite element analy-sis分类
建筑与水利引用本文复制引用
郑金伙,严丰佐,方四宝,张朝慧,杨钦聪,李欣,李海锋..预应力张弦梁钢支撑系统力学性能分析[J].华侨大学学报（自然科学版）,2024,45(2):175-185,11.基金项目
国家自然科学基金资助项目(51778248) （51778248）
福建省厦门市建设局建设科技项目(XJK2022-1-19) （XJK2022-1-19）
