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Test equipment for MB modular bridge expansion device and test method thereof

A technology of telescopic device and test equipment, which is applied in the direction of measuring device, testing of mechanical parts, testing of machine/structural parts, etc. Unreasonable relationship, etc.

Pending Publication Date: 2020-12-25
甘肃省公路工程质量试验检测中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The object of the present invention is to provide a kind of test equipment for MB modulus bridge expansion device, to solve the test equipment of existing MB modulus bridge expansion device, the measurable parameters are not complete, the test efficiency is low, and the sample stress point unreasonable question
[0015] Another object of the present invention is to provide a kind of test method that is used for MB modulus type bridge expansion device, to solve the clamping mode of test samples such as the unspecified maximum horizontal friction resistance and so on in existing MB modulus type bridge expansion device detection The relationship between the number of rubber sealing belts and the specified maximum horizontal frictional resistance at the stressed parts and the multi-slit modular expansion device is unreasonable, the operation method for detecting the assembly tolerance of the MB modular expansion device is not given, and the load-bearing performance test is not available. The size of the steel loading plate and rubber plate is given, and the most unfavorable distribution area of ​​the wheel-loaded ground area on each longitudinal beam of the double-slit or multi-slit expansion device is not considered. The direction of the simulated tire force in the bearing performance test is unreasonable, and the test items are qualified. Incomplete questions

Method used

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  • Test equipment for MB modular bridge expansion device and test method thereof
  • Test equipment for MB modular bridge expansion device and test method thereof
  • Test equipment for MB modular bridge expansion device and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] A test method for MB modulus bridge expansion device test equipment--the test method for the qualified judgment of the designed expansion and contraction, the qualified judgment of the assembly tolerance, and the qualified judgment of the load-bearing performance (the three-slot expansion device and the double-slit expansion device are only qualified for the load-carrying performance) When judging the test, it is necessary to replace the corresponding load-carrying performance test accessories, and the other test procedures are exactly the same, here we take the double-slit expansion device as an example):

[0166] Step 1. Judgment of the design expansion and contraction and the assembly tolerance in the compressed state:

[0167] 1. Sample fixation;

[0168] Place the MB modular bridge expansion device (hereinafter referred to as sample 10) in the test room at 23°C ± 5°C for no less than 24 hours. There should be no corrosive gas and vibration sources that affect the d...

Embodiment 2

[0213] A test method for the test equipment of the MB modular bridge expansion device - longitudinal dislocation test:

[0214] The difference between this embodiment and embodiment 1 lies in the following content:

[0215] In this test, by setting the controller 13, the leftmost mobile pedestal 5 of the test device of the present invention does not move freely throughout the whole process, and the middle mobile pedestal 5 is in a state of free movement. The box 104 is tested to simulate the situation of longitudinal dislocation at the expansion joints of the actual bridge.

[0216] When all step tests in embodiment 1 are qualified, change over to following test procedure:

[0217] Step A: Longitudinal misalignment test:

[0218] 1. Sample fixation;

[0219] Repeat the sample fixing link in step 1.

[0220] 2. Measure the longitudinal dislocation tension distance L 2 ;

[0221] Use a ruler to measure the distance between the leftmost and rightmost two telescopic displace...

Embodiment 3

[0242] A test method for the test equipment of the MB modular bridge expansion device--vertical dislocation test method:

[0243] The difference between this embodiment and embodiment 1 lies in the following content:

[0244] In this test, the height of the sample telescopic displacement box 104 fixed by the second clamping part 61 of the test device of the present invention is constant, and the test is carried out after the sample telescopic displacement box 104 fixed by the first clamping part 51 is used to simulate the actual of bridges with vertical misalignment at expansion joints.

[0245] When all step tests are qualified in embodiment 1-2, change over to following test procedure:

[0246] Step B: Vertical misalignment test:

[0247] The test conditions are the same as in Example 1.

[0248] 1. Sample fixation;

[0249] Before the sample is fixed in step 1, the front part of the sample telescopic displacement box 104 (that is, the part clamped by the first clamping ...

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Abstract

The invention discloses test equipment for an MB modular bridge expansion device and a test method thereof, belongs to the technical field of road and bridge detection, and aims to solve the problemsof incomplete measurable parameters, low test efficiency, unreasonable sample stress points and incomplete basis for judging whether a detection item is qualified or not in existing test equipment. The test equipment comprises a sample fixing device, a tension and compression device, a loading device and a measurement and control device; the sample fixing device comprises a movable pedestal and afixed pedestal which are arranged on a test bed, and a sample is fixed between the movable pedestal and the fixed pedestal. The test method comprises a design expansion amount test method, an assemblytolerance test method, a bearing performance test method, a longitudinal dislocation test method and a vertical dislocation test method. Through equipment research and development, matching methods and judgment standards, the special test equipment and method for the MB modular bridge expansion device are formed, and the test equipment and method have important popularization significance.

Description

technical field [0001] The invention belongs to the technical field of road and bridge detection, and in particular relates to a test device and a test method for an MB modular bridge expansion device. Background technique [0002] In order to prevent the disease of the expansion device of the highway bridge, the main measure of early prevention is to strengthen the quality control of the expansion device entering the site, that is, to strengthen the quality control of the type inspection. MB modular bridge expansion devices are widely used in northwestern provinces and regions of my country. The current road bridge expansion device type inspection standard JT / T327-2016 "General Technical Conditions for Highway Bridge Expansion Devices" in the transportation industry applies to MB modular bridge expansion devices. The routine items such as deformation performance, maximum horizontal friction resistance, maximum vertical deformation deviation per unit, misalignment performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 张海红范善智梁彦和马蔚
Owner 甘肃省公路工程质量试验检测中心有限公司
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