Prefabricated assembling type composite plate type concrete double-connection shear wall with hidden supports

Abstract

A prefabricated assembling type composite plate type concrete double-connection shear wall with hidden supports comprises cast-in-situ outer frame columns, middle columns, reinforced concrete composite walls and horizontal connecting beams, wherein the upper reinforced concrete composite wall and the lower reinforced concrete composite wall are vertically connected and provided with the hidden supports. The reinforced concrete composite walls with the hidden supports comprise prefabricated reinforced concrete wall shells, notches in the four corners, cavities, X-shaped steel diagonal bracings in the cavities, reinforcing ribs, notch steel bars and cost-in-situ concrete. The outer frame columns are core square steel pipe composite columns, stiffening ribs are arranged on the parts, at the joints, of square steel pipes, and the middle columns are provided with H-shaped structural steel. The upper wall and the lower wall are in indirect lap joint through the notch steel bars, connecting steel bars and the reinforcing ribs. The steel diagonal bracings are welded to the square steel pipes and the H-shaped structural steel by adding angle iron, shear resisting pin steel plates in connecting beams and the H-shaped structural steel are welded by adding angle iron, and thus the double-limb shear wall is formed. Compared with an existing prefabricated composite plate type concrete shear wall, the prefabricated assembling type composite plate type concrete double-connection shear wall is more reliable due to vertical connection and better in integrity, the bearing capability is greatly improved, multiple obvious earthquake resisting defensive lines are formed, and an ideal failure mode is achieved on the structure under the action of major earthquakes.

Description

technical field [0001] The invention belongs to the field of building structures and relates to general building structures, in particular to a concrete structure system suitable for industrialized production, and in particular to the composition of a reinforced concrete laminated wall and a connection method for nodes. Background technique [0002] The prefabricated laminated slab concrete shear wall structure system consists of several prefabricated rectangular laminated concrete wall panels (composed of two layers of prefabricated concrete slabs connected by lattice steel bars with a thickness greater than 50 mm, and the cavity is filled with concrete with a thickness greater than 100 mm). A device or structural structure that connects the wall panels up and down, left and right; the prefabricated laminated slab concrete shear wall structure system is an industrially produced concrete structure system, which has the advantages of fast construction speed, short construction ...

AI Technical Summary

Problems solved by technology

[0003] The currently promoted prefabricated laminated slab concrete shear wall belongs to German technology, which does not consider the factors of earthquake action, so it is not suitable for direct application in most areas of China; The disadvantages are weak connection, single anti-seismic defense line, and too thick concrete filling in the cavity when it is applied to high-rise buildings; the vertical connection of the traditional laminated slab concrete shear wall is through the pre-embedded steel bars in the lower wall and the concrete wall shell. Concrete is poured to connect the upper and lower walls into a whole, while the upper and lower prefabricated reinforced concrete wall shells are only connected by a 40mm-50mm thick seat grout. Experimental research shows that this part is a weak link under the horizontal load There are two ways to improve the vertical connection at present: one is to set gaps on both sides of the upper prefabricated reinforced concrete wall shell, and the pre-embedded steel bars on both sides of the lower wall are connected with the notched steel bars, while the connection mode in the middle area remains the same. This method only improves the connection method of the two sides of the wall, and the upper and lower wall shell reinforcements are not directly connected; the second is that a prefabricated reinforced concrete wall shell is pre-embedded with a ring that leaks outside the cast-in-place part. Reinforcing ribs, the pre-embedded connecting steel bars of the lower wall pass through the reinforcing ribs and indirectly overlap the upper wall. Although this method is stronger than the traditional connection, it is an indirect lap after all; obviously, the above-mentioned improved vertical connection method still has Room for improvement; the traditional laminated slab concrete shear wall does not set side columns and concealed columns, and the anti-seismic defense line is single. leg or multi-leg shear wall technology, therefore, did not form an effective multi-seismic defense line; in addition, as the height of the building increases, the thickness of the shear wall will also increase, when the thickness of the prefabricated laminated slab concrete shear wall When it exceeds 400mm, if only double rows of reinforcement are used, a large area of ​​plain concrete will be formed in the middle of the laminated slab concrete shear wall, which will make the stress distribution of the shear wall section uneven. If three or four rows of reinforcement are used, stacking There is no satisfactory solution on how to form the plywood concrete shear wall

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