Simulated frame structure of long-span prestressed concrete slab

Abstract

The invention belongs to the technical field of the structure of constructional engineering, in particular relates to a simulated frame structure of a long-span prestressed concrete slab. The structure is as follows: after a frame column and a longitudinal frame beam are installed, single-T plates of flange-free or flange-removed prestressed hollow single-T beam slabs, multi-T box beams, trough plates or rectangular beams are installed close to two sides of the frame column; a structure erecting reinforcing bar is arranged on the frame column transversely; a bottom formwork is hung along the arris or side surface on the plate or the erecting reinforcing rib and level to the bottom of prestressed concrete slab; a reinforcing bar of a cross beam is arranged in the space formed by the formwork, connected with the reinforcing bar of the frame column and connected by using a stirrup; and finally, a frame beam, namely a simulated frame beam is formed after casting and stirring of concrete according to the specification. The section of the simulated frame beam is reduced; and the flanges of the T-shaped plates do not need to be cut off, thus the cost is reduced, and the construction benefit and the prefabrication benefit are improved.

Description

technical field [0001] The invention belongs to the technical field of construction engineering structures, and in particular relates to a large-span prestressed concrete beam-slab quasi-frame structure. Background technique [0002] Among the long-span prestressed concrete beams and slabs, multi-T box girders, channel slabs, single T beams and slabs with hollow single T beams and slabs (hereinafter referred to as T-slabs) and rectangular beams were used earlier abroad. Its biggest advantage is: large span, large column distance and large span structure can be built; low sagittal height (0.45 ~ 1.085m, about 1 / 3 ~ 1 / 4 of the height of the roof truss structure < the height of the roof truss plus the height of the roof panel >), it can Significantly reduce the height of the building to achieve material and energy saving; good stability, no need for additional lateral support; large component coverage, high installation efficiency, after the installation of the board, the...

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Problems solved by technology

However, there is a provision in the literature that the use of hinged frame structures is not allowed in earthquake fortified areas.

The second is to design the frame structure beams of such long-span members according to the principles of traditional frame structures (this is the only option that can meet the requirements of engineering drawing review according to the design requirements required by the code), but the consequences are not only the cross-section of the frame beams Large and heavy, not only affect the appearance of the building, use space, greatly increase the labor and materials, but also make the construction difficult

Because the beam must be constructed on site, it is difficult to reasonably match the construction sequence of the beam and slab, thus prolonging the construction period

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