Author(s): XU Wenliu, YUAN Bo, ZHAO Jing
Pages: 107-113
Year: 2016 Issue:  5
Journal: Journal of Guizhou University(Natural Science)
Keyword:  suspension action; bond-anchorage performances; RC frame structures; failure of the bond-anchorage;
Abstract: The bond-anchorage performances between the longitudinal reinforcements ( LRs ) embedded in the beam and the concrete under the suspension action was investigated, which provides reference value for the de-signs of the anti-progressive collapse of RC frame structures in the future. The numerical analysis model composes of RC column and LRs. The model was taken as the general finite element analysis software ABAQUS, and the vertical downward displacement were imposed to the LRs. And the effects of anchor lengths, amounts of LRs and row numbers of LRs on the bond-anchorage behaviors were investigated. The analytical results indicate that the failure of the bond-anchorage mainly resulted from the tensile failure of the concrete. The increase of the row numbers of LRs and the amounts of LRs under the same rows can weaken the bond force, and it is useful to in-crease the anchor length. Furthermore, the increase of the axial compression ratios didn' t increase the bond force. Therefore, in order to improve the capacity of anti-progressive collapse of RC frame structures, the LRs should take the single row and decrease its amounts under the same rows under the circumstance of satisfying the strength, and the anchor lengths should be increased.