Device and method for testing distribution of shearing stress on box girder section

• Main Authors: DONG YULI, YANG QINGWEN, GAN WENJIE, ZHANG DASHAN, FANG YUANYUAN
• Format: Patent
• Language: English
• Published: 24.06.2015
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The invention provides a device for testing distribution of shearing stress on a box girder section. The device comprises a box girder test piece, a fixed support and loading devices. The box girder test piece is fixedly installed on the fixed support; strain gages adhere to a specific section of the box girder test piece, and wires of the strain gages are connected with a strain acquisition system and a computer; the box girder test piece is provided with a first loading beam and a second loading beam which are matched with the loading devices, and the installation position of the second loading beam is lower than that of the first loading beam. The invention further provides a concrete interior strain testing method. By means of the device and method, concrete interior strain distribution on the specific section, the upper surfaces and the lower surfaces of a web and a flange and corresponding positions can be accurately tested, and therefore the distribution condition of shearing stress on the section is obtained, and the shearing force lag phenomenon generating on the section is accurately known.