Fill Walls On The Influence Of The Seismic Performance Of Light Steel Frame Structure

Currently, steel frame structure filled with wall structural applications in a wide range, but the maintenance of domestic and foreign researchers study the structure of the theoretical system is not perfect, the depth of research is very limited. Main features:filling the lateral wall mechanical properties on the structure and wall structures and properties of open hole in the wall. China is currently the main design for this type of structure is:the wall is equivalent to dead load applied to the structure, ignoring the beneficial effect of the wall of the structure and the adverseimpact of the structure. However, the wall of the structure of the lateral stiffness of the bearing capacity and greater impact resistance, this will result in the design of the seismic performance of a slight deviation of structure, and wall openings greater impact on the performance of the structure, so filled with steel frame wall architecture research is imperative.In this paper, on the Abaqus finite element software system for steel frame wall filled with in-depth study, the first, test has been carried out by comparison that the use of Abaqus finite element software to fill the walls of the structure and system for modeling analysis is feasible. Subsequently, models were set up reinforcement ratio model, axial load ratio model, with the hole model and a series of models, these models were carried out and the Level of monotonic loading and cyclic loading of low-cycle quasi-static simulation.Extract a series of models of monotonic load-displacement curve, the stiffness degradation curve, hysteresis curves and skeleton curve to analysis of these factors on the seismic performance.Through the analysis:the level of monotonic loading and cyclic loading under the action compared with the pure steel frame, steel frame structure filled with wall structure can improve the bearing capacity and resistance to lateral stiffness, but the structure of the energy dissipation capacity and significant ductility deterioration.Wall of the force areas are mainly concentrated in the compression diagonal to the wall area, not weakened when the wall section, the structure of capacity reduction is due to brittle failure caused by the wall, but this time only part of the area of steel frame achieve different levels of yield state, the structure did not meet the ultimate strength, and therefore replace the wall, the structure can continue to use.When the axial compression ratio of0.2, the structure of the bearing capacity, deformation capacity and ductility less affected, but under the same conditions of axial compression ratio the smaller the better the performance of the structure of the force, the axial compression ratio is too large will cause the structure over the occurrence of early damage.ALC wall reinforcement within the configuration, you can improve the bearing capacity and stiffness of the structure, and with the reinforcement ratio increases, the bearing capacity and stiffness is also growing, but the structure of the ultimate displacement is decreased, ductility deterioration. Wall structures and the capacity of the structure, displacement, stiffness and a series of performance greater impact, and the different openings of different size on the structure, the wall of the ultimate bearing capacity, stiffness increases as the hole size decreases.The energy dissipation and ductility is significantly improved, when the rate of more than40%of openings after the wall of the structure carrying capacity and lateral resistance capacity of pure steel frame with carrying capacity and stiffness of their own less so in the structural design should not set the window size is too large.When the wall hole and spacing of the absolute distance constant, the beam loading on the structure of the different end of the seismic performance of little effect. When the hole in the side column, the structure of the load decreased significantly, there is a certain degree of stiffness and ductility decrease, in the design should be to avoid.Finally, the entire floor to establish a simplified cALCulation model of pure steel frame and fill the wall frame system was time-history analysis, the presence of the wall structure that effectively limits the structure of thelateral and improve the carrying capacity of the structure, while found that the structure of pure steel frame is greater than the fill cycle to clear the wall frame system.