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STS(Steel Tube Slab)管幕结构是一种用于修建地铁站,下穿有隧道、道路、铁路的新型地下支护体系,它是采用混凝土、翼缘板、螺栓将若干个钢管连接起来,形成一个共同受力的支护结构。但STS管幕工法仍存在不足,在STS管幕结构的基础上加以改进,并采用有限元软件研究了翼缘板连接的管幕结构受弯性能的影响。结果表明:钢板连接形式的管幕结构,在一定范围内,极限承载力和横向刚度随混凝土强度的提高而增加较小;翼缘板厚度的增加对横向刚度影响较小,但对极限承载力影响较大,翼缘板厚度每增加1mm,极限承载力提高16.67k N左右;上下翼缘板间距对构件的极限承载力影响较大,翼缘板间距每增加50mm,极限承载力增加100k N左右。
The STS (Steel Tube Slab) pipe curtain structure is a new type of underground support system used for building subway stations, tunnels, roads and railways under the tunnel. Concrete pipes, flange plates and bolts are used to connect several steel pipes. Form a common supporting structure. However, there are still some shortcomings of the STS tube curtain method, which is improved on the basis of the STS tube curtain structure. The finite element method is used to study the flexural behavior of the tube-sheet tube structure. The results show that the ultimate strength and transverse stiffness increase with the increase of concrete strength within a certain range. The increase of flange thickness has little effect on the transverse stiffness, but the ultimate bearing capacity And the ultimate bearing capacity is increased by about 16.67kN. The spacing between the upper and lower flanges greatly affects the ultimate bearing capacity of the members, and the ultimate bearing capacity increases by 100kN for every 50mm increase of flange spacing about.