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Technology for improving stress state of bottom board opening combined box type track beam

A technology of opening combination and stress state, applied in the direction of tracks, roads, bridges, etc., can solve problems such as undiscovered

Pending Publication Date: 2016-08-03
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above patents are all prestressed concrete beams with a closed bottom, but the prestressed composite box-shaped structural beam with an open bottom has not been found so far

Method used

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  • Technology for improving stress state of bottom board opening combined box type track beam
  • Technology for improving stress state of bottom board opening combined box type track beam
  • Technology for improving stress state of bottom board opening combined box type track beam

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0025] Example 2 Prestressing is applied to the combined box-shaped track beam with the floor opening of a suspended monorail traffic, and the post-tensioned web external prestressing beam 2, the pre-tensioned floor prestressed tendon 4, and the combined box track beam 1 with the floor opening are used.

[0026] Step 1 In the workshop prefabrication stage of the combined box-shaped track beam 1 with the bottom plate opening, the steering blocks are set on the outer bottom plate of the box-shaped frame of the combined box-shaped track beam 1 with the bottom plate opening, and tensioning is performed first during the pouring of the combined box-shaped track beam 1 with the bottom plate opening. Prestressed tendons in tensioned floor 4.

[0027] Step 2: Penetrate the post-tensioned prestressed beam 2 through the set steering block on the outer side of the web and perform anchoring and sealing, so as to improve the stress state of the bottom opening track beam.

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Abstract

The invention discloses a technology for improving the stress state of a bottom board opening combined box type track beam and relates to the field of bridges. Specifically, prestress is applied to the suspended type single-track traffic bottom board opening combined box type track beam, so that the stress state of the bottom board opening combined box type track beam is improved. The bottom board opening combined box type track beam (1), post-tensioning method external prestressing tendons (2), post-tensioning method bottom board prestressing tendons (3) and pre-tensioning method bottom board prestressing tendons (4) are included. The technology is characterized in that the post-tensioning method bottom board prestressing tendons (3) or the pre-tensioning method bottom board prestressing tendons (4) are arranged in a bottom board of the bottom board opening combined box type track beam (1); and the post-tensioning method external prestressing tendons (2) are arranged on the outer side of a web of the bottom board opening combined box type track beam (1), so that the stress state of the bottom board opening combined box type track beam (1) is improved.

Description

technical field [0001] The invention relates to the field of bridges, in particular to setting prestress in the combined box-shaped track beam with the opening of the bottom plate of the suspended monorail traffic, so as to improve the stress state of the combined box-shaped track beam with the bottom plate opening. Background technique [0002] For the prestressed composite structural system of suspended monorail traffic, when the track girder adopts a box-shaped frame structure composed of concrete top and bottom plates and corrugated steel webs with longitudinal openings in the middle of the bottom plate, when it is running, the vehicle load directly acts on The bottom plate on the inner side of the box-shaped frame as the running surface, and the corrugated steel web as the vehicle guiding surface, the inner side will also bear the outward load, which makes the inner bottom plate where the running surface is located and the web that the guiding surface passes through as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B25/24E01D19/00E01D2/04
CPCE01B25/24E01D2/04E01D19/00
Inventor 朱尔玉褚海瑞何春晓
Owner BEIJING JIAOTONG UNIV