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Pre-stressed steel frame for exerting pre-stress by support displacement method and fabrication method of pre-stressed steel frame

A technology of prestressed steel and displacement method, which is applied in the processing of building materials, construction, building construction, etc., can solve problems such as waste and large building space, achieve construction cost saving, simple and convenient operation, and ensure construction safety and convenience Effect

Inactive Publication Date: 2013-01-09
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The purpose of this invention is to overcome the above-mentioned disadvantages of wasting a large building space by arranging cables and struts under the beam to apply prestress to the beam, and to provide a prestressing method that uses the support displacement method to apply prestress. Stressed steel frame and method of making same

Method used

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  • Pre-stressed steel frame for exerting pre-stress by support displacement method and fabrication method of pre-stressed steel frame
  • Pre-stressed steel frame for exerting pre-stress by support displacement method and fabrication method of pre-stressed steel frame
  • Pre-stressed steel frame for exerting pre-stress by support displacement method and fabrication method of pre-stressed steel frame

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 , figure 2 Shown is a single-layer prestressed steel frame prestressed by the bearing displacement method, which is composed of fixedly connected beam 1, side column 2 and center column 3, and beam 1, side column 2 and center column 3 are all welded combinations H section steel.

[0029] The lower flange of the beam 1 is vertically welded with connecting plates 4 at 150 mm from the left and right sides of the central column 3, and the connecting plates 4 are steel plates in a large semicircular shape with a round hole in the middle (such as figure 2 shown). The left and right sides of the center column 3 are welded at a height of 1m from the ground. The combined connecting plate 5 is a U-shaped connecting plate formed by welding two right-angled triangle steel plates and a rectangular steel plate with holes.

[0030] The drag cable 6 is a steel wire rope with a rigid cable hook at one end, which is flexibly connected to the connecting plate 4 throu...

Embodiment 2

[0055] The composition of the two-layer prestressed steel frame structure member that adopts the support displacement method to apply prestress is the same as that of embodiment 1, and the specific construction steps are as follows Figure 4 shown.

[0056] ① After the beam 1, side column 2, and center column 3 are finished in the factory, the mid-span of the beam 1 is reversed in advance during factory production (the height of the reverse arch in the middle span is equal to the value of the reserved gap G), or the center column 3 is shortened (shortened The length is equal to the value of the reserved gap G), and the connecting plate 4 is welded on the bottom surface of the beam 1, and the combined connecting plate 5 is welded on the side of the central column 3. On site, first install the side column 2 of the two floors, the beam 1 of the first floor, the foot of the side column 2 is fixedly connected to the ground, the two ends of the beam 1 of the first floor are fixedly ...

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Abstract

The invention discloses a pre-stressed steel frame for exerting pre-stress by a support displacement method and a fabrication method of the pre-stressed steel frame. The pre-stressed steel frame comprises a girder and two edge posts fixedly connected with the girder; a central cylinder is also arranged between the two edge posts; a gap G is reserved between an upper end face of the central cylinder and a bottom surface of the girder; a combined connection plate is respectively fixedly connected with left and right sides of the middle of a lower end of the central cylinder; the bottom surface of the girder corresponding to the upper end face of the central cylinder is vertically fixedly connected with the connection plate corresponding to the combined connection plate; an inhaul cable is arranged between the combined connection plate and the connection plate; one end of the inhaul cable is hooked with the connection plate; the other end penetrates through a hole arranged on the combined connection plate to be mutually clamped with a center hole jack arranged below the combined connection plate; the gap G is removed by a traction effect of the center hole jack, and contact and fixed connection of the upper end face of the central cylinder and the bottom surface of the girder are achieved. The pre-stress is exerted to the steel frame by a support displacement method principle; internal force distribution is uniformly adjusted; a structural material is saved; and the pre-stressed steel frame is convenient to operate and suitable for a multi-storey steel frame structure with more than two spans.

Description

technical field [0001] The invention belongs to the technical field of building structures, and relates to a prestressed steel frame structure and a method for applying prestress, more specifically, to a prestressed steel frame with prestress applied by a bearing displacement method and a manufacturing method thereof . Background technique [0002] For a multi-span steel frame structure, under the action of vertical load, the absolute value of the negative bending moment at the beam end is relatively large, while the rest of the beam is very small, so the internal force distribution of the beam is very uneven. For a frame structure with a large span, this uneven Uniformity becomes more pronounced. The section of the component is designed according to the maximum internal force, so the material used for the traditional frame is very uneconomical. [0003] It is an effective theoretical method to reduce the peak value of the internal force under the normal use state of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/24E04G21/12
Inventor 唐柏鉴马珺王治均
Owner JIANGSU UNIV OF SCI & TECH
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