Large-span prestressed trough composite slab used as roof of air-defense basement

Abstract

The invention discloses a large-span prestressed trough composite slab used as a roof of an air-defense basement in level 6 and below level 6. The large-span prestressed trough composite slab is characterized in that: the large-span, large-load, narrow-width and low-rib trough composite slab and an upper composite layer form a functional component. Due to the elastic-plastic deformation restoring force characteristic coefficients of prestressed slabs, the resistance of the component under the action of short-term effect of nuclear burst shock waves is improved, so that materials are substantially saved, and the floor height is saved. The trough large load meets the use requirements of underground garages; the large span saves parking spaces; the trough narrow slab surface saves the cost and the floor height; the moderate rib height can meet the requirement on load bearing, and the requirement that air channels are formed on the ribs, and does not increase the floor height; and the trough transverse air channels are easy to connect. The large-span prestressed trough composite slab is used on the roofs of the nderground garages, can quicken the construction period, reduces the floor height and the cost, saves column grids, increases the parking spaces and improves the level of the underground garages.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a reinforced concrete composite load-bearing member, in particular to a large-span and large-load prestressed roof used as a basement roof of level 6 and below civil air defense basements or basement roofs covered with soil for running fire trucks Grooved laminated panels. Background technique [0002] The long-span prestressed concrete channel slab is a prefabricated reinforced concrete bearing member combined with beam and slab, which consists of a wide panel and two narrow and high ribs. Its panel is both a transverse load-bearing structure and a compression zone for longitudinal load-bearing ribs. Therefore, long-span prestressed concrete channel slabs have good structural mechanical properties, clear force transmission levels, and simple geometric shapes. They are economical load-bearing components that can be made into large-span, large-load, and large-coverage areas. [0...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems of the current level 6 and below civil air defense basements and garages, to provide a large-span and large-load prestressed groove-shaped laminated slab used as the roof of the underg

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