Analysis Of Lateral Resistance Behavior Of Frame Structure Infilled With Dry-stacked Masonry Wall

Frame structure infilled with masonry wall is one of the most widely used form ofbuilding structures in our country, it has advantages of simple design and constructionand flexible spatial arrangement. In China earthquake disasters occur frequently, a lot ofearthquake disaste surveys indicate that wall arranged incorrectly can cause weak layerdamage, reversing damage, short column damage and wall damage. Many buildingscollapsed and this caused serious casualties and property losses. In order to improve theseismic performance of frame structure and reduce the rigidity effect of infilled wall toframe the group proposes that the dry-stacked masonry wall is used of infilled wallof frame structure. The in-plane friction of blocks can resist in-plane loads anddissipate energy, mounted effect between the blocks can resist the lateral loads. In orderto research on the lateral resistance behavior of frame structure infilled with dry-stackedmasonry wall and understand the seismic performance of the structure, this paperestablishes finite element model of the structure and analyzes multiple factors that effecton lateral resistance behavior of the structure. The main contents and the results are asfollows:(1) Based on the ABAQUS finite element software, establish numerical model fora single layer, single-span test model of frame structure infilled with dry-stackedmasonry wall. Use a simplified separation model for dry-stacked masonry wall and"touch" property to simulate the interaction between the frame and the wall and betweenthe blocks. Through the comparative analysis of results of finite element andexperimental results, it is proved that the model established in this article is reasonableand reliable.(2) Use the finite element model established in this article, research the influencesof friction coefficient, elastic modulus of block, block density and vertical load onlateral resistance of the frame structure infilled with dry-stacked masonry wall. Theconclusions are as follows, influences of friction coefficient and vertical load on lateralresistance of the structure are significant, influences of elastic modulus and density onlateral resistance of the structure are little. Under the action of horizontal load stressareas of dry-stacked masonry wall are mainly concentrated along the diagonal linescope in the direction of the force. Stress concentration phenomenon of wall corner isserious. Plastic hinge appears in the beam-column connection close to the horizontalload, stress and plastic strain of the bottom of column in the other side are large.(3) Use the finite element model established in this article, study the influences ofsize of windows, size and location of doors on lateral resistance of the frame structure infilled with dry-stacked masonry wall. The conclusions are as follows, influence of sizeof hole on lateral resistance of the structure is great. The larger the hole rate of infilledwall is, the smaller lateral bearing capacity and stiffness of the structure are, the greaterthe deformation capacity is. Influence of location of door on lateral resistance of thestructure is little. The lateral resistance of hole offset model is related to the direction ofhorizontal load, more close to the load side of the hole is, larger lateral resistance is.Region of larger stress focus in the masonry around the hole, the top and bottom ofcolumns. Infilled wall around the hole will form local support of frame.