Test device and test method for long-term alternating load of continuous beam bridge

A test device and long-period technology, which is applied in the direction of measuring devices, machine/structural component testing, instruments, etc., can solve the problems of unbalanced and symmetrical loading values, difficulties in realization, and incomplete synchronization of two-span separation loading to achieve installation Simple, low test site requirements, easy to synchronize and continuously test the effect

Inactive Publication Date: 2018-09-04
西安华清科教产业(集团)有限公司
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Problems solved by technology

[0002] For the loading of the traditional concrete continuous beam model test, the separated ground anchor loading frame is used. There are two shortcomings in the loading condition of the simulated operating load in the two-span continuous beam model test: (1), the two-span continuous beam model test has two disadvantages: The cross-separation loading cannot be fully synchronized, which makes the loading values ​​on both sides unbalanced and symmetrical. The redistribution state is uncontrollable, which will bring large test error noise and interfere with the effective value of the test, resulting in discrete test results; (2), if considering the long-term alternating action of the simulated bridge operating load, the two-span separated loading test The device is limited, and there are great difficulties in realization

Method used

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  • Test device and test method for long-term alternating load of continuous beam bridge
  • Test device and test method for long-term alternating load of continuous beam bridge
  • Test device and test method for long-term alternating load of continuous beam bridge

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Effect test

Embodiment 1

[0039] The present invention can complete alternating and balanced loading on the negative moment zone of the fulcrum of the continuous beam, and the specific implementation scheme is as follows.

[0040] refer to figure 1 , figure 2 , image 3 and Figure 4 , the present invention is made up of base system by lower support stomp 1 and large crossbeam 3, two stomp distances are continuous beam total length 2L, and large crossbeam 3 is lapped on the lower support stomp 1. The middle support 4 is connected with the large beam 3 with bolts, and the roller shaft 5 is welded and fixed on the middle support 4. The height of the middle support 4 can be determined according to the site conditions. The test system is composed of pads, hydraulic jack 8 and force sensor 9, wherein the lower end of hydraulic jack 8 is connected to the large beam 3 by bolts. The distance between the middle support 4 and the hydraulic jack 8 is the single-span length L of the continuous beam. The for...

Embodiment 2

[0050] The present invention can complete the cyclic loading of the maximum positive bending moment on the side span of the continuous beam, and the specific implementation scheme is as follows.

[0051] The installation of the test equipment components is the same as that of the first embodiment, and will not be repeated here.

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Abstract

The invention provides a test device and test method for the long-term alternating load of a continuous beam bridge and belongs to the field of bridge engineering experimental mechanics measurement methods. The test device comprises a base system, an intermediate support system, a measurement system and an intermediate force transmission system. A test is carried out according to the steps of calculating a control cross section bending moment affecting line shape in advance, determining a most unfavorable loading position, assembling a test self-balancing frame and adjusting a hydraulic jack.The test device and the test method have the advantages of simple structure installation, synchronous alternating balanced loading and the adaption to actual field conditions, and the adaption of actual field conditions, the long-period alternating continuous loading test can be carried out on a two-span continuous beam bridge.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement of bridge engineering experiments, is suitable for carrying out long-period alternating cyclic loading tests on continuous girder bridges, and particularly relates to a test device and a test method for long-period alternating loading of continuous girder bridges. Background technique [0002] For the loading of the traditional concrete continuous beam model test, the separated ground anchor loading frame is used. There are two shortcomings in the loading condition of the simulated operating load in the two-span continuous beam model test: (1), the two-span continuous beam model test has two disadvantages: The cross-separation loading cannot be fully synchronized, which makes the loading values ​​on both sides unbalanced and symmetrical. The redistribution state is uncontrollable, which will bring large test error noise and interfere with the effective value of the test, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/007
Inventor 郭琦冯磊张如毅孙虎平张西安
Owner 西安华清科教产业(集团)有限公司
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