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Precast prestressed steel girder with post-seismic restorable function

A recovery function and prestressing technology, applied in the direction of earthquake resistance, joists, girders, etc., can solve problems that hinder the application of steel frame structure systems with recoverable functions, increase the difficulty of steel frame construction, and prolong the construction time of steel frames, so as to improve the construction efficiency. Quality, convenient construction, and the effect of reducing construction time

Inactive Publication Date: 2012-10-31
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing recoverable functional steel frame system requires on-site tensioning of prestressed cables, which not only increases the construction difficulty of the steel frame, but also prolongs the construction time of the steel frame, thus hindering the recoverable functional steel frame structure to a certain extent Application of the system in practical engineering

Method used

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  • Precast prestressed steel girder with post-seismic restorable function
  • Precast prestressed steel girder with post-seismic restorable function
  • Precast prestressed steel girder with post-seismic restorable function

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Embodiment Construction

[0031] Such as Figure 1-9 As shown, a prefabricated prestressed steel beam with recoverable function after an earthquake of the present invention includes a middle beam section, short beam sections at both ends, a connecting device and an energy dissipation device, and the middle beam section includes a middle beam section web 1 and the middle beam section flange 2; the short beam section includes a short beam section web 3 and a short beam section flange 4; the connecting device refers to a connecting device between the middle beam section and two short beam sections, including connecting risers 5, Prestressed cable 6; the energy dissipation device includes two channel steels 7 and high-strength bolts 8 (see attached figure 1 ).

[0032] The installation process of the prefabricated prestressed steel girder in the factory is as follows:

[0033] 1) Weld one side of the connecting vertical plate 5 with the web 3 of the short beam section and the flange 4 of the short beam ...

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Abstract

The invention discloses a precast prestressed steel girder with a post-seismic restorable function, which belongs to the field of building structures. The steel girder comprises an intermediate girder section, short girder sections, a connecting device and an energy dissipation device, wherein the short girder sections are arranged at the two ends of the intermediate girder section; the intermediate girder section comprises an intermediate girder section web and an intermediate girder section flange connected to the edge of the intermediate girder section web; each short girder section comprises a short girder section web and a short girder section flange connected to the edge of the short girder section web; the connecting device is used for connecting the intermediate girder section and the short girder section, and comprises a connecting vertical plate and a prestressed guy cable; and the energy dissipation device comprises U-bars (arranged on both sides of the intermediate girder section web) and high-strength bolts. When the seismic effect achieves to a certain extent, the intermediate girder section is separated from the contact surface of the connecting vertical plate, and the high-strength bolts consume energy through friction, thereby avoiding the damages to main members such as girders and columns and the like. After the seismic effect is completed, the structure is restored to the original vertical position under the action of a prestressing force.

Description

Technical field: [0001] The patent of the present invention relates to a steel structure system, especially a prefabricated prestressed beam steel frame anti-seismic structure system with recoverable functions applied in the field of building structures. Background technique [0002] Steel frame beam-column joints are widely used in seismic steel structures. The traditional steel frame beam-column rigid joints are divided into two types. Site welding, the beam web and the splice plate are connected by high-strength bolts, and the splice plate and the flange of the steel column are welded at the factory; Beams and frame beams are bolted and welded at the construction site or fully bolted. However, these two types of beam-column joints are prone to brittle failure due to unprotected beam end welds after earthquakes. In recent years, the improved steel frame beam-column joints, such as strengthening and weakening, can achieve the purpose of plastic hinge moving outward during ...

Claims

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Application Information

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IPC IPC(8): E04C3/04E04C5/08E04B1/98E04G21/00
Inventor 张爱林张艳霞刘学春叶吉健
Owner BEIJING UNIV OF TECH
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