Floor slab damage avoiding type double-beam self-resetting anti-seismic steel framework

Abstract

The invention discloses a floor slab damage avoiding type double-beam self-resetting anti-seismic steel framework which comprises at least one structural unit. Each structural unit comprises two framework columns, an upper I-shaped steel beam and a lower I-shaped steel beam, wherein the upper I-shaped steel beam and the lower I-shaped steel beam are in vertically adjacent arrangement, two ends ofthe upper I-shaped steel beam are connected with the framework columns through upper flange steel plates, two ends of the lower I-shaped steel beam are connected with the framework columns through lower flange steel plates, a gap is reserved between the upper I-shaped steel beam and the lower I-shaped steel beam, two ends of the upper I-shaped steel beam and the lower I-shaped steel beam are connected into a whole through end limiting devices, pre-tensioning rods are anchored between the end limiting devices at two ends, shear connectors are arranged on webs of the upper I-shaped steel beam and the lower I-shaped steel beam, and ends of the shear connectors are welded to the framework columns. The floor slab damage avoiding type double-beam self-resetting anti-seismic steel framework has advantages that self resetting of steel structures in small earthquakes and intermediate earthquakes can be realized, structural damages in severe earthquakes are avoided, floor slab pull cracks are avoided due to a self-resetting mechanism, and accordingly post-earthquake economic loss is effectively reduced.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a double-girder self-resetting anti-seismic steel frame with no damage to the floor. Background technique [0002] The self-resetting steel frame structure is a new type of structural form that provides self-resetting force for the structure by tensioning pre-tensioned rods, which can effectively reduce the residual deformation of the structure after the structure is subjected to an earthquake. Under frequent earthquakes, the gap between the beam-column joints of the self-resetting steel frame structure does not open, similar to a moment-resistant frame, and its structural members remain elastic; under the action of moderate or large earthquakes, the self-resetting steel frame structure passes through the beam-column The gap is opened at the top and bottom of the node, so that the energy-dissipating components installed at the node position consume the seismic energy to reduce or e...

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The present invention provides a double-girder self-resetting anti-seismic steel frame that can solve the problems of low initial stiffness of self-resetting double girders and easy damage to beam-column connections, etc.

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