Cause analysis of cracks of frame edge beams in a long-span cast-in-place floor structure
Based on the observation and calculation of the failure phenomenon of the edge beams in a large-span cast-in-place floor structure,the following conclusions are drawn.The end of the edge beams of the frame and the secondary beams of the floor are embedded and restrained when the whole cast in place,especially the edge beams of the frame supporting multiple large-span secondary beams are always in the state of bending,shear and torsion.The restraint effect of coordinated torsional embedment in the 1/3 span of the frame edge beam is significant,which should be paid great attention to and should not be reduced or ignored,and the anti-torsional effect should be considered in design.The binding effect of the secondary beam in the middle 1/3 span of the frame edge beam is not significant,which can be disregarded,and the maximum torque of the edge beam changes little,and the secondary beam in the middle 1/3 span can be designed according to the simple supported beam at both ends.
NETL
NSTL
万方数据
维普
