Automatic controlling device and method for bridge static load test

Abstract

The invention discloses automatic controlling device and method for a bridge static load test and relates to the technical field of bridge quality inspection equipment. The automatic controlling device comprises a test main controlling device, a loading executive device, a load measuring device, a deflection measuring device and the like. The automatic controlling method comprises the following steps: calculating a calculating load value Pk of each load grade; reading a detection load value Fi and a deflection value in real time, setting a relative lower limit deviation percentage Llim and a relative upper limit deviation percentage Ulim, comparing with Fi to obtain Fmax and Fmin; and comparing Fmax and Pk (1+Ulim), and selecting to execute a dynamic automatic balancing process or a synchronous balancing loading process. By automatically controlling the whole loading process by an industrial computer, the automatic controlling device and method are capable of automatically detecting and storing synchronous loading, automatic load balancing, load data and deflection data of each point, obtaining test reports, remotely monitoring test data and field images and also saving a great deal of manpower.

Description

technical field [0001] The invention relates to the technical field of bridge quality inspection equipment, in particular to an automatic control device and an automatic control method for a bridge static load test. Background technique [0002] In the domestic high-speed railway construction, the proportion of bridges is getting higher and higher, prefabricated beams are about 85%, and cast-in-place beams are about 5% to 10%. Life safety is closely related. The safety and non-replaceability of bridges are of paramount importance. Therefore, the design and standards require that 100% of the bridges must achieve a hundred-year lifespan. [0003] At present, bridge static load test is the only means to evaluate the performance of bridges. In order to ensure that 100% of the bridge quality meets the requirement of a hundred-year life, it is required that the static load test of the bridge must ensure accurate loading, correct judgment, authentic and reliable test data, and c...

AI Technical Summary

Problems solved by technology

[0013] The present invention proposes an automatic control device and an automatic control method for a bridge static load test, which solves the problem of synchronous balanced loading of each point and deformation of the reaction frame and the test beam that cannot be realized by the existing bridge static load test device and the method for realizing the bridge static load test of the beam The dynamic and automatic balance of the loads at each loading point avoids the problems of man-made calculations and recorded deviations, errors, and falsifications. It can not only realize the automatic detection and storage of test load data and deflection-span ratio data, but also automatically generate test reports. The influence of jack eccentric load improves the loading accuracy, and it has a double checking system and emergency function, which makes the test results more accurate and reliable, and realizes the test data upload and image remote monitoring, and saves a lot of manpower

That is to say, in the loading stage, the problem of fast loading at the two ends of the upper arch of the reaction frame and the lower deflection of the test beam, and slow loading at the mid-span of the large deformation, was automatically adjusted, and ten loading points were simultaneously loaded to the same load; During the load-holding period, it solves the problem that the deformation caused by the upward arch of the reaction frame and the downward deflection of the test beam are different at each loading point, resulting in different drops in the load value of each loading point, and the load of each loading point can be automatically adjusted and balanced at any time The technical problem is to realize that each loading point has been kept at the load value specified in the test during the load holding time

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