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Method for testing anti-interference ability of epoxy resin reinforcement of double-layer beam test piece

An epoxy resin, double-layer technology, applied in the direction of applying repetitive force/pulsation force to test the strength of materials, can solve the problem of no evaluation of reinforcement effect, and achieve accurate evaluation of reinforcement effect, strong operability, and simple and easy method. row effect

Active Publication Date: 2016-06-15
甘肃省交通规划勘察设计院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there are no relevant reports evaluating the reinforcement effect

Method used

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  • Method for testing anti-interference ability of epoxy resin reinforcement of double-layer beam test piece
  • Method for testing anti-interference ability of epoxy resin reinforcement of double-layer beam test piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 An anti-interference method for testing epoxy resin-reinforced double-layer beam specimens includes the following steps:

[0021] ⑴The double-layer beam of 200mm×50mm×25mm is used to simulate the hollow slab girder of the bridge, and it is reinforced with ordinary epoxy resin to simulate the glue injection reinforcement of the hinge joint of the hollow slab bridge.

[0022] Among them: ordinary epoxy resin refers to a resin that does not change in viscosity within 40 to 60 minutes and cures quickly in 60 to 120 minutes.

[0023] ⑵After curing for 24 hours, the UTM universal testing machine is used to carry out repeated loading to simulate the dynamic load of driving during the process of joint glue injection reinforcement of the hollow slab bridge (such as figure 1 Shown).

[0024] Among them: the loading condition means that the temperature of the temperature control box is 20 degrees Celsius, the loading stress is 20KPa, the loading frequency is 1Hz, the loading is...

Embodiment 2

[0026] Example 2 An anti-interference method for testing epoxy resin reinforced double-layer beam specimens includes the following steps:

[0027] ⑴The double-layer beam of 200mm×50mm×25mm is used to simulate the hollow slab girder of the bridge, and it is reinforced with ordinary epoxy resin to simulate the glue injection reinforcement of the hinge joint of the hollow slab bridge.

[0028] Among them: ordinary epoxy resin refers to a resin that does not change in viscosity within 40 to 60 minutes and cures quickly in 60 to 120 minutes.

[0029] ⑵After adding ordinary epoxy resin, immediately use UTM universal testing machine for repeated loading to simulate the dynamic load of the vehicle during the process of joint glue injection reinforcement of the hollow slab bridge (such as figure 1 Shown). The interference time is 1 hour, then stop. After the resin is cured to 24 hours, the load is repeated on the UTM universal testing machine.

[0030] Among them: the loading condition means...

Embodiment 3

[0032] Example 3 An anti-interference method for testing epoxy resin-reinforced double-layer beam specimens includes the following steps:

[0033] ⑴The double-layer beam of 200mm×50mm×25mm is used to simulate the hollow slab girder of the bridge, and it is reinforced with ordinary epoxy resin to simulate the glue injection reinforcement of the hinge joint of the hollow slab bridge.

[0034] Among them: ordinary epoxy resin refers to a resin that does not change in viscosity within 40 to 60 minutes and cures quickly in 60 to 120 minutes.

[0035] ⑵After adding ordinary epoxy resin, immediately use UTM universal testing machine for repeated loading to simulate the dynamic load of the vehicle during the process of joint glue injection reinforcement of the hollow slab bridge (such as figure 1 Shown). The interference time is 2 hours, then stop. After the resin is cured for 24 hours, the load is repeated on the UTM universal testing machine.

[0036] Among them: the loading condition mea...

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Abstract

The invention relates to a method for testing the anti-interference ability of epoxy resin reinforcement of a double-layer beam test piece. The method comprises the steps of: (1) employing a double-layer beam to simulate a bridge hollow slab beam, and performing reinforcement with common epoxy resin or modified epoxy resin to simulate glue injection reinforcement to hollow slab bridge hinge joints; (2) conducting curing for 0-24h, then employing a UTM universal testing machine to perform repeated loading to simulate the dynamic load of a travelling crane in a hollow slab bridge hinge joint glue injection reinforcement process; and (3) collecting the double-layer beam's single deformation, accumulative deformation and strength before and after reinforcement to represent the anti-interference ability of double-layer beam glue injection reinforcement. The method provided by the invention is simple and practicable, and has strong operability, and the test result has definite representation meaning, and can reflect the anti-interference ability of the reinforcement process.

Description

technical field [0001] The invention relates to the technical field of bridge detection and reinforcement evaluation, in particular to an anti-interference method for testing epoxy resin reinforced double-layer beam specimens. Background technique [0002] The hollow slab has light weight and good structural performance, and can be prefabricated in batches in factories. It has been widely used in highway and bridge engineering. Since the 1970s, a large number of prefabricated reinforced concrete simply supported slab girder bridges have been built in various provinces and cities in my country, making the proportion of prefabricated reinforced concrete slab girder bridges larger. At the same time, due to environmental factors, increased road traffic, and unreasonable design and construction, bridge prefabricated hollow slabs are prone to damage at the hinge joints, which in turn causes the single slab to be stressed; the overall bearing capacity of the bridge and culvert is w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
CPCG01N3/32
Inventor 魏定邦杨小森李晓民钱普舟丁民王晖张国宏赵静卓
Owner 甘肃省交通规划勘察设计院股份有限公司
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