Reinforcement device and method for bent pressure rod

Abstract

The invention discloses a reinforcement device and method for a bent pressure rod. The reinforcement device comprises first U-shaped steel and second U-shaped steel; the first U-shaped steel comprisesa first flange, a first web and a second flange, the first flange is provided with first circular holes, and the second flange is provided with first slotted holes; the second U-shaped steel comprises a third flange, a second web and a fourth flange, the third flange is provided with second slotted holes, and the fourth flange is provided with second circular holes; and the first circular holes and the second slotted holes are fixed through single-sided bolts, and the first slotted holes and the second circular holes are fixed through single-sided bolts. The reinforcement method includes thefollowing steps of forming the first circular holes, the first slotted holes, the second slotted holes and the second circular holes respectively, wherein the flanges are parallel with the initial deflection direction of the bent pressure rod; performing overlap connection in a circular hole and slotted hole overlapping manner; and fixing the circular holes and the slotted holes through the single-sided bolts. By means of the reinforcement device and method, self-adaption to bent pressure rods with different deflections is achieved through the slotted holes in the flanges without changing thesize of the U-shaped steel, reinforcement can be achieved through the same U-shaped steel, and the adaptability of engineering application can be easily improved.

Description

technical field [0001] The invention belongs to the field of space structure reinforcement, in particular to a reinforcement device and a reinforcement method for a curved compression bar. Background technique [0002] At present, people have higher and higher requirements for the unshielded space of large buildings, and it is difficult for the original structural form to meet these requirements. The large-span space structure is currently the fastest-growing structure type, and the development status of the space structure technology as its core is one of the important symbols representing a country's architectural technology level. [0003] When the failure of the space structure caused by unqualified construction quality can be avoided, the damage of the space structure is usually caused by the instability of the key members. Taking the grid structure as an example, its key members generally refer to some upper chords in the span. Under the action of strong wind or stro...

AI Technical Summary

Problems solved by technology

Weld steel plates or section steel directly on the space structure rods, welding residual stress will be generated on the rods, which will have an adverse effect on the structure; paste FRP on the periphery of the rods, such as CFRP materials, although they have high strength properties, but if used to reinforce the axial For stressed members, the CFRP material contributes very little to the stable bearing capacity of the members; the bonded steel reinforcement method, first of all, the steel sheet is not easy to deform with the members, which is not convenient for construction; The strength of the glue is high, and it is also required to withstand fatigue load and anti-aging

And after the above method is used to strengthen, when the axial pressure is large, the buckling instability of the member will still occur.

[0005] The Chinese patent with the application number 201510423508.7 discloses a method for strengthening key members of space structures, which is composed of steel plates and section steel through unilateral bolts to form a square restraint component. When the key member is a curved member and the initial deflection is uncertain, such as Using the method proposed in the above patent will require reinforcement and restraint parts of various specifications, which will bring difficulties to the manufacture of restraint parts

Images