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A hollow slab bridge hinge joint bearing capacity test specimen and its manufacturing method and testing method

A technology of hollow slab bridge and bearing capacity, which is applied in the field of bridges, can solve the problems of small size, etc., and achieve the effects of simple production, convenient test observation and results arrangement, and convenient static and fatigue tests

Active Publication Date: 2019-02-15
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The second technical problem to be solved by the present invention is to provide a method for making test specimens for bearing capacity of hollow slab bridge hinge joints. The test specimens produced by the present invention are small in size and convenient for static and fatigue tests. The invention successfully solved the technical problem of rapid measurement of the mechanical performance of hinged joints

Method used

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  • A hollow slab bridge hinge joint bearing capacity test specimen and its manufacturing method and testing method
  • A hollow slab bridge hinge joint bearing capacity test specimen and its manufacturing method and testing method
  • A hollow slab bridge hinge joint bearing capacity test specimen and its manufacturing method and testing method

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Embodiment 1

[0066] What this embodiment provides is a 10m hollow slab bridge, and its design is consistent with the new standard of the Ministry of Communications 2008 general set of plans for a simply supported 10m hollow slab bridge Figure 1 Sincerely.

[0067] The specific production includes the following steps:

[0068] (1) Determine the reinforcement of the first concrete beam 1, the second concrete beam 2, the hinge joint 3 and the concrete pavement layer 4 and the strength grade of the concrete.

[0069] According to the standard drawing of the first-class simply supported 10m hollow slab girder bridge of the new specification of the 2008 general set of drawings issued by the Ministry of Communications, the height of the first concrete beam 1 h 1 600mm, the width of the first concrete beam 1 b 1 300mm, the length of the first concrete beam 1 l 1 is 1495mm, the height of the second concrete beam 2 h 2 600mm, the width of the second concrete beam 2 b 2 300mm, the length of ...

Embodiment 2

[0088] This embodiment is a widened hollow slab bridge with a span of 10m. It is composed of new and old hollow slab girders with different rigidities. Slab bridge standard Figure 1 , its torsional rigidity is 6.93×10 10 . The hollow slab girder of the old bridge is a double-hole plate Figure 15 , and its torsional stiffness is 4.93×10 10 . The difference from Example 1 is that the torsional rigidity of the new and old hollow slab girders is different, so when testing the bearing capacity of the hinge joint between the old and new hollow slab bridges, the resistance of the first concrete beam 1 and the second concrete beam 2 in the designed test components The bending stiffness is different, and the first concrete beam 1 represents the old hollow slab beam on the side of the hinge joint of the tested hollow slab bridge, and its width b 1 300mm, height h 1 is 943mm; the second concrete beam 2 represents the new hollow slab beam on the other side of the hinge joint of ...

Embodiment 3

[0090] The structure of the hollow slab bridge of this embodiment is basically the same as that of the first embodiment, the difference is that the concentrated load loaded during the test of this embodiment is based on the test methods of pure shear, pure bending or combined bending and shearing. to change the loading position. At the same time, two displacement meters can be arranged on the left side of the bottom surface of the second concrete beam 2 to observe the mechanical performance of the hinge joint under the action of concentrated load and the vertical relative displacement of the beams on both sides of the hinge joint.

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Abstract

The invention relates to a hollow-slab-bridge hinge joint bearing capacity test piece, a manufacturing method thereof and a test method of the test piece. The test piece includes a first concrete beam and a second concrete beam. Reinforcing steel bars are disposed in the first and second concrete beams. Forms of the reinforcing steel bars and stirrups in the first concrete beam are same as those of the reinforcing steel bars and stirrups at corresponding positions in the first concrete beam. A hinge joint is disposed between the first and second concrete beams. A whole concrete pavement layer is disposed on the first and second concrete beams. The strength grade of the first concrete beam and the strength grade of the second concrete beam are same as the strength grade of a hollow slab bridge to be tested. The test piece is simple to manufacture, strong in operationality, convenient in experiment research of hinge joint stress performance and small in volume, can conveniently perform static force and fatigue tests, and can overcome the technical difficulty, namely rapid measurement of hinge joint stress performance.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a specimen for testing the hinge joint bearing capacity of a hollow slab bridge, a manufacturing method and a testing method. Background technique [0002] Hollow slab bridge is a commonly used bridge type, which is simple in structure, convenient in construction, and widely used. Hinge joints are the key components that connect such bridges in the horizontal direction. However, engineering practice shows that hinge joints have poor durability and often suffer from leakage, whitening and falling off. Therefore, they are also weak components of this type of bridges. At present, the code does not provide a calculation method for the bearing capacity of hinge joints. Designers regard them as structural joints and think their bearing capacity is sufficient, which is contrary to reality. The key issue is how to obtain the bearing capacity value of hinge joints. [0003] At present, the full-sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00G01N1/28
CPCG01N1/28G01N3/00
Inventor 陈记豪朱倩赵顺波
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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