House retrofitting

Project overview

In order to meet the needs of house retrofitting, we should reinforce the beams and columns, reinforce the beams above the original load-bearing walls used carbon fiber reinforced polymer(CFRP), and add concrete columns to the walls at both ends.

CFRP wrapping for beam

Carbon fiber fabric is A grade of high strength, 300g/m2, 0.167mm thickness, carbon fiber adhesive a grade adhesive

Reinforcement of column concrete

The main tendons of the column are 4 and 20, and the stirrup is 10@100/200. Column, column reinforced the original implant insertion depth of 200mm beam, deep, concrete with C30 fine stone concrete.

In the existing brick column foundation, brick additions in the side column, effectively unloading on the floor, the floor using steel support support, from top to bottom layer complete removal of load-bearing walls, and pouring reinforced concrete beams, alternative load-bearing walls, over a layer of concrete beam strength meet the design load of 90% when entering the construction cycle of the next layer. The structural form is a simple supported beam.

The feasibility and reliability analysis of increasing the concrete column:

Concrete columns have good stiffness, compression resistance, corrosion resistance and durability. Concrete columns have good bonding ability with retaining walls, and improve the stability of walls. And the concrete column and beam column ends by planting way, effective bond and concrete with original beams, with good integrity, and the original column load bearing wall after force to the lower beam, again carries on the stress distribution of the lower beam has good compressive ability, and then assigned to the diffusion beam wall. Not to beam under concentrated load on the lower wall, the bearing capacity of the structure does not constitute a substantial increase, can guarantee the safety of the structure.