Reinforcement system and construction method of existing masonry buildings reinforced by jacket portal frame

Abstract

The reinforcement system and construction method for strengthening existing masonry buildings with outer jacket portal frames of the present invention belong to the technical field of strengthening existing masonry buildings, and the system includes reinforced concrete portal frame columns, portal frame beams and cable members . The reinforced concrete portal frame columns are arranged on the outside of the original outer longitudinal wall along the direction of the original transverse wall. The reinforced concrete portal frame columns extend from bottom to top to the roof. The reinforced concrete portal frame columns are cantilevered from the original balcony. The beams are connected by longitudinal anchor bars. The portal frame beams are arranged on the top of the reinforced concrete portal frame columns along the direction of the original transverse wall. The cable components pass through the original transverse wall at the lower part of the original floor, and the two ends pass through the reinforced concrete portal frame columns and are anchored. The invention improves the lateral stiffness and seismic bearing capacity of the structure without increasing the building area and the self-weight, and transfers part of the seismic action and vertical load borne by the main structure to the reinforced concrete portal frame structure.

Description

technical field [0001] The invention relates to the technical field of reinforcement of existing masonry buildings, in particular to a reinforcement system and a construction method for reinforcing existing masonry buildings with a portal-type rigid frame. Background technique [0002] Due to its low cost, masonry structures are widely used in my country. Due to the long history of construction and low design requirements, there are many problems such as low material strength, poor structural integrity, and seismic capacity that cannot meet the requirements of seismic identification. Reinforcement treatment is urgently needed. [0003] Traditional seismic strengthening methods for masonry structures include shotcrete reinforcement, slab wall reinforcement, reinforced mesh mortar surface reinforcement, external seismic transverse wall reinforcement, and external cast-in-place concrete ring beam-constructive column method. The slab wall reinforcement method is to remove the pl...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a reinforcement system and construction method for strengthening existing masonry buildings with a portal frame, so as to solve the limitations of traditional reinforcement methods, including many wet operations, home reinforcement, earthquake isolation reinforcement, Pile driving inside and around the building, and it is necessary to carry out soft connection transformation of building water, electricity and gas pipelines, and suspension transformation of elevators and stairs. The amount of pile foundation construction and earthwork excavation is large, the comprehensive transformation cost is high, and the disturbance is large; fiber-reinforced composite materials The reinforcement method needs to polish the external wall surface, which causes environmental pollution, and the project cost is high; the steel strand-polymer mortar reinforcement method has high requirements for structural adhesives, and the reinforcement effect depends on the bonding effect, and the cost is high

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