Fixing device for load test of pre-stressed concrete beam and testing method

Abstract

The invention provides a fixing device for a load test of a pre-stressed concrete beam and a testing method. The fixing device comprises two horizontal test beams with opposite flange boards which are taken as counter-force frames; fixing frames for surrounding the periphery of the end parts of the test frames are respectively arranged at the two ends of the two test beams; each fixing frame comprises an upper bearing board, a lower bearing board, a left bearing board and a right bearing board, and the end parts of all the bearing boards are connected with one another to define a framework structure; the lower lateral faces of flange boards of the test beams are located on the lower bearing boards; the left bearing boards are in contact with the bottom face of the end part of a web plate of one test beam, and the right bearing boards are in contact with the bottom face of the end part of a web plate of the other test beam; and a transverse load jack is arranged between the two test beams. The fixing device provided by the invention has the advantages of simple structure, convenience in manufacturing and use, and no damage on the beam; and the testing method in the load test with the fixing device has no need of a great number of real objects with load, and facilitates the test in situ.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to the improvement of a fixing device and a testing method of a test beam when testing the actual bearing capacity of a prestressed concrete beam through a load test. Background technique [0002] At present, the known prestressed concrete beam load tests are generally carried out in laboratories of universities and scientific research institutes, and the test beam is placed on a large-scale compression testing machine for loading during the test. For concrete beams made on site or prestressed concrete beams that have been placed in actual projects (including prestressed concrete beams that need to be identified by load tests after a period of use), if it is necessary to test their actual Bearing capacity, there are two methods: one is to remove the concrete beam, transport it to the laboratory, and test it with a pressure testing machine; the other is to directly test t...

AI Technical Summary

Problems solved by technology

[0003] When using method 1 for testing, the weight of the beam is relatively large, the transportation is time-consuming and laborious, and there is a possibility of damage to the beam; when using method 2 for testing, it is necessary to provide a large load and have a relatively large loading space

Images