Method for reinforcing bridge by external transverse prestressing tendons

A technology of transverse prestressing ribs and prestressing, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve problems such as the inability to change the transverse force of bridges, achieve strong promotion and application value, little loss of prestress, and simple structure Effect

Inactive Publication Date: 2013-09-04
SHANXI PROVINCIAL RES INST OF COMM
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  • Abstract
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Problems solved by technology

[0003] The invention provides a method for strengthening bridges with external transverse prestressed tendons, which aims to solve the problem that the traditional method of strengthening bridges with external prestressed tendons is generally applied in the longitudinal direction of the bridge and cannot change the transverse force of the bridge

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  • Method for reinforcing bridge by external transverse prestressing tendons
  • Method for reinforcing bridge by external transverse prestressing tendons

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[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the invention.

[0019] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The object of the present invention is to provide a method for strengthening bridges with external transverse prestressed tendons, figure 1 It shows the transverse prestressing arrangement diagram of a bridge reinforced with external transverse prestressing tendons provided by the present invention; the method adopts fine-rolled rebar as the transverse prestressing tendons, and the tension end and the fixed end of the transverse prestressing t...

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Abstract

The invention belongs to a method for reinforcing a bridge by external transverse prestressing tendons. The method is characterized in that finish-rolled deformed steel bars are used as the transverse prestressing tendons, the tensioning ends and the fixing ends of the transverse prestressing tendons are cone anchors. The finish-rolled deformed steel bars are used as the transverse prestressing tendons, so that influences of vehicle load and bridge vibration on anchoring effect are reduced; the tensioning ends and the fixing ends are the cone anchors, so that loss of prestress is reduced effectively; loss of prestress of the finish-rolled deformed steel bars in an operation period is low; and meanwhile, the finish-rolled deformed steel bars can be tensioned quite conveniently, are simple in structure and high in practicality, and has high popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of bridge reinforcement, in particular to a method for reinforcing bridges with external transverse prestressed tendons. Background technique [0002] The traditional method of strengthening bridges with external prestressing is generally applied in the longitudinal direction of the bridge, which can easily increase the flexural bearing capacity of the mid-span section and improve the structural force. Generally, 8-12 pieces are arranged, and external prestress is applied longitudinally. Although the stress of each hollow slab is improved, the application of longitudinal prestress cannot change the transverse stress of the bridge, and may even aggravate the possibility of lateral veneer stress. The main reason for the prefabricated hollow slab is that the lateral connection is weak, and its bearing capacity must be improved by improving the lateral stiffness. The best way to improve the lateral stiffness is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
Inventor 张俊成武移风刘玉柱杨振峰郝晓燕谢海龙傅卯生王雪鹏郭茂泉
Owner SHANXI PROVINCIAL RES INST OF COMM
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