A finite element analysis of the beam-to-column web connection with H-shaped columns was performed using the ANSYS computer program. Based on the finite element analysis and theoretical analysis, a simplified model wa...A finite element analysis of the beam-to-column web connection with H-shaped columns was performed using the ANSYS computer program. Based on the finite element analysis and theoretical analysis, a simplified model was developed to describe the cyclic loading behavior of beam-to-columns web connection in steel moment resisting frames, considering both bending and shear deformation modes of the beam flange plate. Several issues appearing to merit further researches were identified in the process of developing this model, such as the effect of beam flange plate on beam-to-column web connection stiffness and strength. A reasonable agreement was achieved between model predictions and finite element data, which verified the feasibility of the proposed model.展开更多
Prestressed steel ultrahigh-strength reinforced concrete(PSURC) beam is a new type of prestressed concrete beam, which not only has a considerable compressive strength attributed to the ultrahigh strength concrete, bu...Prestressed steel ultrahigh-strength reinforced concrete(PSURC) beam is a new type of prestressed concrete beam, which not only has a considerable compressive strength attributed to the ultrahigh strength concrete, but also ensures a certain degree of ductility at failure due to the existence of structural steel. Five of these beams were monotonically tested until shear failure to investigate the static shear performance including the failure pattern, loaddeflection behavior, shear capacity, shear crack width and shear ductility. The experimental results show that these beams have superior shear capacity, crack control ability and shear ductility. To study the shear performance under repeated overloading, seven PSURC beams were loaded in cyclic test simultaneously. The overall shear performance of cycled beams is similar to that of uncycled beams at low load level but different at high load level. The shear capacity and crack control ability of cycled beams at high load level are reduced, whereas the shear ductility is improved. In addition, the influences of variables including the degree of prestress, stirrup ratio and load level on the shear performance of both uncycled and cycled beams were also discussed and compared, respectively.展开更多
基金Sponsored by the National Natural Science Foundation of China(Grant No.50538050)Foundation of Heilongjiang Educational Committee(Grant No.11521210)
文摘A finite element analysis of the beam-to-column web connection with H-shaped columns was performed using the ANSYS computer program. Based on the finite element analysis and theoretical analysis, a simplified model was developed to describe the cyclic loading behavior of beam-to-columns web connection in steel moment resisting frames, considering both bending and shear deformation modes of the beam flange plate. Several issues appearing to merit further researches were identified in the process of developing this model, such as the effect of beam flange plate on beam-to-column web connection stiffness and strength. A reasonable agreement was achieved between model predictions and finite element data, which verified the feasibility of the proposed model.
基金Supported by the National Natural Science Foundation of China(No.51078059)
文摘Prestressed steel ultrahigh-strength reinforced concrete(PSURC) beam is a new type of prestressed concrete beam, which not only has a considerable compressive strength attributed to the ultrahigh strength concrete, but also ensures a certain degree of ductility at failure due to the existence of structural steel. Five of these beams were monotonically tested until shear failure to investigate the static shear performance including the failure pattern, loaddeflection behavior, shear capacity, shear crack width and shear ductility. The experimental results show that these beams have superior shear capacity, crack control ability and shear ductility. To study the shear performance under repeated overloading, seven PSURC beams were loaded in cyclic test simultaneously. The overall shear performance of cycled beams is similar to that of uncycled beams at low load level but different at high load level. The shear capacity and crack control ability of cycled beams at high load level are reduced, whereas the shear ductility is improved. In addition, the influences of variables including the degree of prestress, stirrup ratio and load level on the shear performance of both uncycled and cycled beams were also discussed and compared, respectively.
