Four sets of 12 bending tests of prestressed glued laminated timber(glulam)-concrete composite beams with different shear connections were tested.The test parameter is the shear connection form,inclu-ding notch connections,notch plus screw connections,and the combination of multi connections.The re-sults of the bending test showed that the main failure mode of the composite beams was the bending failure of the timber.For beams with the same notch plus screw connection,applying prestress increased the aver-age bending bearing capacity by 20.3%,the average collapse bending stiffness by 10.1%.At failure,ob-vious slip occurred at the shear connection.The beam with notch plus screw connection showed better in-tegrity and flexural capacity when it failed compared to the other two sets of composite beams,which meant that the notch plus screw connection presented a better connection effect.
关键词
预应力/胶合木-混凝土组合梁/剪力连接/受弯试验
Key words
prestress/glulam-concrete composite beams/shear connection/bending test
维普
万方数据