Experimental study on Q690 steel-highstrength bolts bearing-type shear connection
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Abstract:
Bearing-type shear connection of 32 sets of Q690 steel-highstrength bolts (property grade 10.9 or 12.9) were studied through experiments. Tear-out failure, splitting failure, bearing failure, net cross section failure, and bolt shear failure were observed. Through the analysis of the test data, it is found that Q690 highstrength steel had good local deformation ability. Furthermore, the effects of bolt grade, size, pretension, end distance, and edge distance on the bearing capacity and deformation of the specimen were studied. The experimental data in several papers were collected and analyzed, showing that the geometric limit between the tear-out failure and splitting failure was about from 0.7e1/e2 to 0.9e1/e2, and the stress ratio of the net section failure specimen was greater than 1.0.
