摘要
为研究基坑工程钢支撑体系中活络端的偏心受压性能,建立有限元模型,经试验结果验证后,开展一系列的数值模拟,系统研究偏心距、试件的关键参数等对活络端在偏心荷载作用下的轴向承载性能和抗弯性能的影响。结果表明,活络端的偏心距不应超出箱型体外边缘;箱型体间的缀板能够有效提升活络端的抗弯性能;活络端承载性能和抗弯性能随钢楔长度、钢楔宽度、钢板厚度和箱型体长度的增加而提高;且改变钢板厚度能明显改善活络端的承载性能和抗弯性能。
In order to study the eccentric compression performance of the disconnectable coupling joint of steel bracing system for foundation pit, a finite element model was established and verified by the existing test results.Based on the numerical model, the influences of different eccentricities on the bearing capacities of the disconnectable coupling joint were analyzed, and then the influences of the key parameters of the joints on the bearing and bending capacities of the disconnectable coupling joint were studied in detail.The analysis results show that the eccentricity of the disconnectable coupling joints should not exceed the outer edge of the box-body;the batten plate can improve the flexural performance of the disconnectable coupling joints effectively;the bearing capacity and bending resistance of the disconnectable coupling joints increase with the steel wedge length, steel wedge width, steel plate thickness and box-body length;and the bearing capacity and bending resistance of the disconnectable coupling joints can be improved evidently through the change of the steel plate thickness.
作者
张明聚
谢治天
李鹏飞
郭彩霞
Zhang Mingju;Xie Zhitian;Li Pengfei;Guo Caixia(Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2021年第10期106-116,共11页
China Civil Engineering Journal
基金
国家自然科学基金(51978018、51738010)。
关键词
基坑工程
钢支撑
活络端
偏心受压
有限元分析
参数分析
foundation pit project
steel bracing
disconnectable coupling joint
eccentric compression
finite element analysis
parametric analysis
