Large-span underground structure externally-wrapped U-shaped steel reinforced concrete beam and manufacturing method thereof

Abstract

The invention provides a novel large-span underground structure externally-wrapped U-shaped steel reinforced concrete beam and a manufacturing method thereof. The concrete beam structurally comprises a concrete beam body, U-shaped section steel, shear connectors and steel bars; the U-shaped section steel is externally wrapped outside the concrete beam and located on the lower middle side of the concrete beam; the shear connectors are welded to the inner side of the U-shaped section steel and used for connecting the U-shaped section steel and the concrete beam and transmitting shear force; and a steel bar frame is arranged in the concrete beam and is not in contact with the U-shaped section steel and the shear connectors. The externally-wrapped U-shaped steel reinforced concrete beam structure can remarkably improve the tensile bending resistance of the beam, improve the bearing capacity of the structure and reduce the cross section size of the beam, can be widely applied to building structures, bridge structures and other engineering structures, and is particularly suitable for large-span underground structures with the large-load characteristic.

Description

technical field [0001] The invention relates to the field of structural engineering, in particular to a U-shaped steel-concrete beam wrapped in a large-span underground structure and a manufacturing method thereof. Background technique [0002] In recent years, my country's modernization level has gradually improved, and the demand for urban space capacity has expanded rapidly, resulting in increasingly tight urban land resources. It is imperative to increase the development and utilization of underground space. As the volume of underground structures continues to increase and the loads become more complex, the traditional form of underground structures can no longer meet the requirements of today's underground space development. In order to adapt to the trend of modern underground space development towards large-span, multi-functional, and three-dimensional intersections, it is necessary to strengthen the research on new forms of underground building structures under the co...

AI Technical Summary

Problems solved by technology

However, for the long-span underground structure, due to its large load characteristics, the middle and lower part of the beam is prone to concrete cracking under the action of large tension and bending moment, and the size of the crack exceeds the limit value of the code. On the basis of increasing the cost, take effective measures to control the occurrence of cracks to ensure the normal operation of the beam structure

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