Seismic Performance Analysis Of Concrete Hollow Block Filled Wall Frame Structure

The frame-filled wall structure is a similar combination of the main frame and the filling wall.Due to the different materials and a variety of connection methods can be used in the frame structure and the filling wall,there are the complex interaction between them,so that the seismic performance of the frame filling wall is different from that of the pure frame.Although the domestic and foreign scholars have done some research and other aspects of the framework of the wall of the seismic performance from the theoretical analysis and experimental,there are still some issues to be studied.The aim of this paper for concrete hollow block infilled wall frame structure is:1.Based on a lot of literature,the stress state and the failure mode of the frame filled wall structure are analyzed under the earthquake load,and the effects of the filling wall on the frame structure are summarized.At the same time,some anti-Constructive measures are proposed.2.The present evaluation model of the existing frame filling wall is evaluated.Based on the theory of single-pole diagonal bracing,a simplified model of concrete hollow block filled wall frame is established,namely "multi-linear plastic connection unit model".By defining the restoring force model of the concrete hollow block filling wall,the validity of the model is verified by the structural analysis software SAP2000 and the existing experiments.3.The model of frame filled wall structure with six different filling walls was established by using plastic connection unit model.The influence of filling rate and filling wall position on the self-vibration period of frame structure is analyzed.The periodic reduction factor in the specification is suggested.For the infilled wall frame structure concrete hollow block,when the filling rate is above 80%,the value of the periodic reduction coefficient can be corresponding to 0.6~0.7,when the filling rate is below 80%,the periodic reduction coefficient is 0.7~0.8.4.The static elastic-plastic analysis of six kinds of frame-filled wall structures is carried out,and the seismic performance was evaluated from the filling rate and the filling position.The initial stiffness,horizontal carrying capacity,yield displacement and structural ductility of each model are compared.The distribution of plastic hinge layer displacement and inter layer displacement are compared and analyzed.The bearing capacity and deformation performance of the whole structure are improved by the presence of the infill wall,but the ductility is reduced.In addition,the seismic performance level of the frame filled wall structure is quantified.When the arrangement of the infill wall is improper,the structure damage is more serious.Therefore,when the vertical layout of the infill wall is arranged,the uniform symmetry should be satisfied as far as possible.At the same time,the improvement measures are put forward by theoretical calculation and numerical simulation,and the stiffness ratio of the two-layer stiffness and the bottom layer should be less than 2.70.