Internal Force Calculation and Design Method of Semi-integral Seamless Bridge Slab

A technology of seamless bridges and design methods, applied in computing, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2019-03-12
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is no relevant theoretical calculation formula at home and abroad on how to calculate the internal force effect of the semi-integral seamless bridge slab
[0003]If the applied load is small, the calculation of the internal force of the slab can be calculated approximately according to the calculation method of the slab for bridges with gaps, that is, simply supported beam method; if the load is relatively large large, the internal force calculation method of bridge slabs with seams is not suitable for seamless bridges

Method used

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  • Internal Force Calculation and Design Method of Semi-integral Seamless Bridge Slab
  • Internal Force Calculation and Design Method of Semi-integral Seamless Bridge Slab
  • Internal Force Calculation and Design Method of Semi-integral Seamless Bridge Slab

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Embodiment 1

[0082] Example 1: In order to verify the feasibility of the above model calculation method, select four bridges with continuous semi-integral seamless beam bridges with hollow slabs whose lengths are 16×3m, 16×6m, 16×9m, and 16×12m respectively, corresponding to No. 1#, 2#, 3#, 4#, the main parameters are as follows: Among them, the main girder girder is 0.85m high, 1m wide, and the bridge width is 12m, that is, the cross bridge is spliced ​​with 12 hollow slabs. The board is 8m long, 0.3m high and 12m wide. Both the main girder and the bridge head slab are made of C30 concrete material, and the steel bars are proposed to be HRB335 steel bars. The bridge adopts the continuous structure of the whole bridge, and the semi-integral abutment of the bridge head is seamlessly constructed. The support adopts one-way support and allows the bridge to move along the bridge direction, and is arranged symmetrically from the temperature center to ensure that the expansion and contraction d...

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Abstract

The invention relates to an internal force calculation and design method for semi-integral seamless bridge transition slabs. The invention provides a correction method for the calculation of the internal force of transition slabs of semi-integral seamless bridges, which is based on the theory on the internal force calculation for conventional seamed bridge transition slabs and based on the consideration that the joint of a near abutment end transition slab (4) and a main beam (6) is influenced by the influencing factors such as main beam stretching and retraction and beam end bending deformation under the effect of temperature change loads. With the calculation method, the calculation for the internal force of transition slabs of semi-integral seamless bridges can be converted to calculation for a simply supported beam. Through parameter table lookup, the transition slab design process is simpler, the difficulty in the internal force calculation for transition slabs is greatly reduced and the method is more suitable for practical engineering application. The simply supported beam correction method supplements the design theory for bridge end transition slabs and provides advice and reference for the design of semi-integral seamless bridge transition slabs.

Description

Technical field: [0001] The invention relates to an internal force calculation and design method for a semi-integral seamless bridge slab, which is suitable for calculating and designing the internal force of a semi-integral seamless bridge slab, and belongs to the field of bridge engineering. technical background: [0002] With the rapid development of our country's economy, the destruction of bridges is becoming more and more serious, which has caused great losses to the national economy. The main reason for this situation is the damage of the telescopic device. In foreign countries, this situation is also common. However, the emerging semi-integral seamless bridge can effectively solve this problem. It can absorb the expansion and contraction deformation transmitted from the main girder to the bridge head by canceling the telescopic device between the main girder girder end and the abutment, that is, the main girder and the abutment. The bridge head straps are directly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 徐亮庄一舟任卫刚周泉田伟
Owner FUZHOU UNIV
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