Design internal stress analyzing method for hinged hollow plank girder bridge with reinforced transverse prestress

A transverse prestressed, hollow slab girder technology used in bridge reinforcement, bridge construction, bridges, etc.

Inactive Publication Date: 2013-03-06
HUA HUI ENGINEERING DESIGN GROUP CO LTD
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  • Abstract
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Problems solved by technology

In the past, the hinged plate method was generally used to calculate the lateral load distribution of hinged plate girder bridges, and the space problem was simplified to a plane problem. Consistent with the assumptions of the rigid-connected beam and elastically supported beam method, the existing finite element software is used to model and calculate the transverse distribution influence line and bridge internal force of the reinforced bridge. On the one hand, its modeling calculation is also complex and time-consuming

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  • Design internal stress analyzing method for hinged hollow plank girder bridge with reinforced transverse prestress
  • Design internal stress analyzing method for hinged hollow plank girder bridge with reinforced transverse prestress
  • Design internal stress analyzing method for hinged hollow plank girder bridge with reinforced transverse prestress

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Embodiment Construction

[0023] Please refer to the attached figure 1 to attach Figure 7 As shown, a horizontally prestressed hinged hollow slab girder bridge consists of a concrete hollow slab girder 1, hinge joints 2, transverse prestressed steel bars 3, bridge deck pavement concrete 4, bridge deck pavement steel bars 5, side girders The anchoring system 6, the anti-corrosion fatigue prestressed steel pipe 7 and the prestressed steel pipe fixing device 8 are composed of several parts.

[0024] However, due to the effect of the transverse prestressed steel bar 3, the structural form and stress characteristics of the reinforced bridge are changed. The transverse shear force and bending moment can be transmitted between the plate girders at the same time. The increase in transverse rigidity makes the load not only in the longitudinal direction, At the same time, it spreads in the horizontal direction, so it is necessary to analyze and calculate the design internal force of the reinforced bridge.

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Abstract

The invention discloses a design internal stress analyzing method for a hinged hollow plank girder bridge with reinforced transverse prestress. Transverse prestress is applied to reinforce a hollow plank girder bridge with a hinged joint, and the reinforcing mode is one of effective measures for solving the single-plate force applying and the crack along the hinged joint of the hinged hollow plank girder bridge. The patent aims at the characteristics that the plank girder reinforced by the reinforcing method can bear bending bidirectional stress in the longitudinal and transverse directions, and simulates the reinforced hollow plank girder bridge to an orthotropic anisotropic plate and adopts a corresponding longitudinal-transverse rigidity hypothesis to propose an internal stress analyzing method for designing the bridges with the reinforced transverse prestress, so that the problem that no practical design calculation methods are available for the internal stress analysis of the hinged hollow plank girder bridge is solved, and meanwhile, the complexity and time consumption of the modeling calculation in the finite element software calculation are avoided.

Description

technical field [0001] The invention relates to a design internal force analysis method of a hinged hollow slab girder bridge strengthened by transverse prestress, and belongs to the technical field of bridge engineering. Background technique [0002] The traditional design of hollow slab-girder bridges mainly relies on the limited hinged concrete transfer and common force between the slab-girders. However, with the advancement of technology and the continuous increase of vehicle loads, this structural design method has exposed serious defects. That is, as the vehicle load continues to increase, the lateral bending of the bridge increases, and the lateral bending resistance of this bridge structure is weak, which makes the original hinged concrete easy to crack, break or be damaged by bending and shearing, and cannot effectively Distributes vehicle loads, causing stress and collapse of the structural veneer. [0003] However, applying a bridge-to-bridge prestressing system ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D101/28
Inventor 项贻强邵林海邢骋邢渊赵阳
Owner HUA HUI ENGINEERING DESIGN GROUP CO LTD
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