A mid-span special-shaped cross-section fiber reinforced concrete beam

Abstract

The invention relates to a fiber concrete beam with a special-shaped mid-span section, which can satisfy the construction requirements of rigidity and strength in the normal service state of a structure and has sufficiently high ductility in an earthquake, so as to reduce the damage degree of a building, and belongs to the field of anti-seismic and shock absorption technologies of structural engineering. On the condition that a mid-span can bear sufficient normal carrying capacity, such as a shearing force and a bending moment, a high-ductility cast-in-situ glass fiber concrete is constructed inside the special-shaped mid-span section to improve the ductility of the whole beam body, realize a high ductile failure mode of the beam body and finally realize the damage from the mid-span; and an unbonded prestressing steel strand is constructed inside the mid-span section to ensure that the beam body satisfies the design standard of carrying capacity and also realize the resetting of the beam body in the case that he beam body shits and deforms in an earthquake. By using the high-ductility concrete, the automatic restoration of the beam is improved through a prestressing reinforcing steel bar in the plastic destruction process of the mid-span of the beam, thus the shock absorption and the energy dissipation of a beam structure are realized, and finally the shock absorption and anti-seismic functions of the whole building are realized.

Description

technical field [0001] The invention relates to a mid-span special-shaped section structure equipped with prestressed tendons to achieve high ductility, which can meet the rigidity and strength structure requirements in the normal use state of the structure, has sufficient high plasticity when an earthquake occurs, and slows down the damage of buildings. The field of anti-seismic and shock-absorbing technology of structural engineering. Background technique [0002] With the development of society and the frequent occurrence of earthquakes in recent years, people pay more and more attention to the seismic performance of buildings, but the seismic design of buildings in my country, especially in underdeveloped areas, is not perfect, and the Wenchuan and Ya'an earthquakes have exposed Something went wrong, and the result was a huge loss to humanity. In recent years, among the building damages caused by frequent earthquake disasters, a large part of them is the direct fracture ...

AI Technical Summary

Problems solved by technology

However, under strong earthquake disasters, the beam structure in the building often undergoes some brittle failure or damage with small plastic deformation when the earthquake strikes, causing huge damage to the building.

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