Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure

A steel bridge deck and angle steel technology, applied in bridge reinforcement, bridges, bridge parts, etc., can solve the problems of weakening the rigidity of the original structure, and achieve the effects of preventing accidental falls, simple operation, and inhibiting initiation and expansion

Inactive Publication Date: 2014-09-24
CHANGAN UNIV
View PDF6 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problem that the out-of-plane deformation reinforcement technology of steel plate girder bridge

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure
  • Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure
  • Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] The reinforcement specimen selected in this embodiment is an I-shaped steel beam welded by the flange plate 4, the stiffening rib 2 and the web 1. The flange plate 4 is a rectangular steel plate with a length of 600mm, a width of 300mm and a thickness of 24mm; the web 1 is a rectangular steel plate with a length of 600mm, a height of 870mm and a thickness of 8mm; the stiffener 2 is a length of 120mm and a height of 790mm , A rectangular steel plate with a thickness of 6mm; between the flange plate 4 and the stiffener 2 at the web gap, use high-strength bolts to bolt the angle steel 3, leaving a 10mm distance between the side end of the angle steel and the web 1, see Figure 1~2 The angle steel 3 in this embodiment is an equal-leg single angle steel, and the single angle steel is a standard angle steel of L140mm×140mm×14mm.

[0018] Before reinforcement, prepare the test piece for bolting angle steel 3 reinforcement, including roughening the joint surface o...

Example Embodiment

[0019] Example 2

[0020] The single angle steel in the above embodiment 1 is replaced with a double angle steel with a specification of L140mm×140mm×14mm, such as image 3 As shown, the other components and their connection relationship are the same as in the first embodiment.

[0021] The reinforcement method is the same as in Example 1.

Example Embodiment

[0022] Example 3

[0023] The single angle steel in the above embodiment 1 is replaced with a T-shaped angle steel with a specification of 280mm×140mm×14mm×14mm, such as Figure 4 As shown, the other components and their connection relationship are the same as in the first embodiment.

[0024] The reinforcement method is the same as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Widthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure, and belongs to the technical field of bridge engineering. Web gaps among a steel plate girder web, a stiffening rib and a flange plate are reinforced by a steel angle. One limb of the steel angle is connected with the stiffening rib by high-strength bolts, while the other limb is connected with the flange plate by the high-strength bolts or screws; the structure can effectively improve the mechanical property of the web gaps and inhibit the initiation and propagation of out-of-plane distortion fatigue cracks, and the structure has the characteristics of being convenient in construction, simple in operation, low in cost and excellent in performance; in addition, in the connecting way of combining the steel angle with the screws, the structure not only can be reinforced without removing a concrete bridge deck or blocking traffic, but also can improve the safety and durability of the connection, prevent the steel angle from accidentally falling, and avoid accidents.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a steel bridge surface deformation fatigue reinforcement structure based on bolted angle steel. Background technique [0002] Fatigue problems of steel bridges seriously affect the service life of bridges. Studies have shown that about 90% of fatigue cracking problems in steel bridges are caused by out-of-plane deformation or secondary stress at fatigue-sensitive details. In the design of steel bridges, the transverse connection between the girders is realized through the connection between the cross brace and the vertical stiffener welded to the web of the main girder. Fatigue failure occurs in the welded details, usually leaving a web gap of tens of millimeters between the vertical stiffener and the tension flange of the main girder. In actual operation, under the action of the vehicle load, there will be a deflection difference between the steel girders...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E01D22/00E01D19/00
Inventor 王春生孙宇佳闫生龙王茜段兰魏孟春翟慕赛
Owner CHANGAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap