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

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...

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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

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