Numerical Simulation And Analysis Of Cantilever Self Reset RC Frame Node Based On ABAQUS

The basic idea of seismic design of traditional structural systems is to adopt ductile design,which requires some structural components to enter a plastic state to dissipate seismic energy when an earthquake occurs,thus causing difficulties in post-earthquake repair and difficult to immediately resume use,resulting in huge indirect economic losses.Since the 1990s,performance-based seismic design has become one of the mainstream directions of structural seismic research.Performance-based seismic design refers to the anticipated seismic capacity of the designed building under the possible earthquake action in the future,which can reduce the damage of the building and even make the building recoverable.At present,experimental research and numerical simulation are the effective methods to study the reset performance and energy dissipation capacity of self-resetting structures Although the experimental results are intuitive,they have long cycle and high cost,and most of them are different from the actual structure.With the development of computer software and numerical simulation theory,finite element method has become an important means to study the performance of self-resetting structures.In this paper,the finite element software ABAQUS is used to simulate and analyze the experimental model of 8 kinds of cantilever friction self-resetting RC frame joints.The hysteretic behavior of the joint under low cycle repeated loading is studied.According to the results of the hysteretic curve of its bending moment and rotation angle,the energy dissipation performance and resetting ability of the cantilever friction self-resetting RC frame members are verified.The results of numerical simulation are compared with the experimental and theoretical results respectively.Then,combined with the experimental and numerical simulation results,the construction measures and construction methods of the cantilever friction self-resetting RC frame members are proposed.The numerical simulation analysis shows that the cantilever friction self-resetting RC frame joints have good self-resetting ability and energy dissipation ability,in which the pre-stressed steel strand provides the self-resetting ability of the joints.With the increase of the initial tension force of the pre-stressed tendons,the self-resetting ability of the joints increases,and the initial stiffness and load-bearing capacity of the joints also increases gradually.The greater the positive pressure of the friction plate,the greater the friction force,the more obvious the energy dissipation capacity.Finally,the comparison results show that the finite element software ABAQUS can better simulate the response of the cantilever friction self-resetting RC frame joints under low-cycle cyclic loading.