Experimental study on shear behavior of epoxy joints of segmental precast concrete cap beams
Due to few research on shear behavior of epoxy joints of segmental precast concrete cap beams with key-tooth joints currently,3 groups of 7 full scale specimens with key-tooth joints were designed and produced,and a direct shear experiment was carried out by taking 3 factors of key tooth inclination angle,key tooth depth and lateral compressive stress into account.The test results show that:The failure mode of the key tooth epoxy joint under direct shear load is brittle,and the shape of main crack is influenced by the coupling of lateral com-pressive stress,key tooth depth,and key tooth inclination angle;Increasing the lateral compressive stress or the key tooth depth can effec-tively improve the shear bearing capacity of the key tooth epoxy joint,and the relative sliding at failure state remains at the same level;The cracking load and shear bearing capacity of the key tooth epoxy joint are maximum as the inclination angle of the key teeth is 30 °,and the shear bearing capacity joint will significantly decrease as the inclination angle of the key teeth is greater than 45 °.It is suggested that the inclination angle of the key teeth should not exceed 45 ° in practical engineering.
万方数据
维普
