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Safety judgment method for arch ring deformation during disassembly and assembly of spandrel building

An arch ring and safety technology, applied in the field of bridge structure reinforcement construction process control, to achieve the effect of avoiding permanent damage

Active Publication Date: 2018-11-27
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the founding of the People's Republic of my country, a large number of arch bridges have been built in our country. However, with the improvement of social industrial level, the increase of traffic load, and the influence of factors such as low original design standards and degradation of bridge material conditions, many arch bridges built before have become four. Class or V bridges, these bridges urgently need to be repaired and strengthened or demolished and rebuilt

Method used

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  • Safety judgment method for arch ring deformation during disassembly and assembly of spandrel building
  • Safety judgment method for arch ring deformation during disassembly and assembly of spandrel building
  • Safety judgment method for arch ring deformation during disassembly and assembly of spandrel building

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Embodiment Construction

[0030] The method for judging the safety of the deformation of the arch ring during the disassembly and assembly of the building on the arch is used for a parabolic unhinged arch of equal cross-section, which specifically includes the following steps:

[0031] The first step is to obtain the basic parameter values ​​of the structure from the design drawings, including span l, height f, arch elastic modulus E, arch cross-sectional area A, and moment of inertia I;

[0032] In the second step, the parabola is approximately replaced by the catenary line, and the arch constant a of the equivalent catenary line is obtained by using the dichotomy method;

[0033] In the third step, take the vault as the origin (0, 0), establish a coordinate system along the span direction of the arch as the x-axis (positive to the left), and the y-axis (positive to the downward) along the direction of the sagittal height, and obtain this coordinate system The deflection v(x, i) of any section i when ...

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Abstract

The invention discloses a safety judgment method for arch ring deformation during disassembly and assembly of a spandrel building. In the method, firstly, structural basic parameter values are obtained according to a designed drawing, a suspension cable line replaces a parabola approximatively, and the deflection of any section generated when unit force is exerted on the arch of the parabola is calculated; then, disassembly and assembly loads and corresponding positions are determined according to a construction scheme, and the current deflection of the key section of the arch is worked out; finally, the field measurement deflection of the key section is compared with the determined deflection. With the method, whether or not arch ring deformation is within a safe range can be rapidly andaccurately evaluated during disassembly and assembly construction of the spandrel building, problems are conveniently found out on site and solved in time, and the defects that in the prior art, a finite element method is generally adopted, as a result, calculation time is long, and a parameter influence rule can not be directly obtained are overcome.

Description

technical field [0001] The invention belongs to the field of bridge structure strengthening construction process control, and in particular relates to a method for judging the safety of arch ring deformation during the disassembly and assembly of arched buildings. Background technique [0002] The arch is both a structure and a building, and it is widely loved. Since the founding of the People's Republic of my country, a large number of arch bridges have been built in our country. However, with the improvement of social industrial level, the increase of traffic load, and the influence of factors such as low original design standards and degradation of bridge material conditions, many arch bridges built before have become four. Class or V bridges, these bridges urgently need to be repaired and strengthened or demolished and rebuilt. From the perspective of economic benefits, for bridges that can be rebuilt, the method of maintenance and reinforcement is a better choice. [0...

Claims

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Application Information

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IPC IPC(8): E01D22/00G06F17/50
CPCE01D22/00G06F30/13
Inventor 杨雨厚张磊黄铁林子安玉开柱江京翼
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD