摘要
某地铁车站采用STS新管幕结构作为初期支护。为研究新管幕构件在跨中集中静载作用下的抗弯性能,共进行8榀新管幕构件的对比试验。主要变化参数为横向连接螺栓、上下翼缘板是否焊接、连接螺栓通长、钢管间距、翼缘板厚度和混凝土强度等级。试验结果表明:下翼缘板焊接显著提高了新管幕构件的刚度和极限承载力;横向螺栓连接、翼缘板厚度加大、混凝土强度等级提高、连接螺栓通长对新管幕构件的极限承载力影响较小,但对新管幕构件的刚度影响较大;上翼缘板焊接、钢管间距减小对新管幕构件的刚度和极限承载力影响均不明显。建议给出新管幕构件正截面抗弯承载力的计算公式,计算结果和试验结果吻合较好。
STS （Steel Tube Slab） structure was used to construct subway station as a primary support. To investigate the flexural capacity of STS members, eight STS members were fabricated and tested under a concentrated load. The major parameters included connecting bolts, welding of flange plate, continuous bolts, spacing of adjacent steel tubes, flange thickness and concrete compressive strength. The experimental results indicate that the ultimate capacity and stiffness of STS member was increased significantly with the welding of bottom flange. Connecting bolts, increased flange thickness, concrete compressive strength and continuous bolts had a limited effected on the flexural capacity of STS members, but effectively improved the stiffness of STS members. The stiffness and ultimate flexural capacity of STS member can be little enhanced by the upper flange welding or smaller spacing of adjacent steel tubes. A calculating formula was proposed to predict the flexural capacity of the STS members, and good agreement between the tested results and calculation values was obtained.
出处
《工程力学》
EI
CSCD
北大核心
2016年第8期167-176,共10页
Engineering Mechanics
基金
国家自然科学基金项目(51578116)
关键词
新管幕构件
地铁车站
抗弯承载力
刚度
延性
试验研究
Steel Tube Slab member
subway station
flexural capacity
stiffness
ductility
experimental study
