Seismic Effect Analysis Of Masonry Building With Concrete Frame-shear Wall Structure Considering Seismic Action In Two Directions Simultaneously

Masonry building with concrete frame-shear wall structure on ground story boastsmany merits, such as easy to construct, short construction period and cost relatively low.Plus the formation of large space at the bottom, so it widely used in street constructionof small towns in China. However, for the bottom of the large space requirements, it’seasy to make the bottom of the structural layout of the asymmetry, the formation of thecentroid and just coincidence that eccentric structure. The bottom of the frame-shearwall masonry buildings research focuses on the structure of the vertical anomaloussituation, the bottom frame layer and transition layer masonry lateral stiffness ratio,involving a relatively small flat irregular situation. Research method to test mainlyfocused on a number of practical engineering, there are some limitations. Therefore it’snecessary for numerical simulation analysis of the bottom frame building layoutasymmetry. In the bottom frame building existing research results on the basis ofnumerical simulation using the ABAQUS finite element analysis software to create a3D model, by considering the two-way horizontal seismic, seismic frame constructionthe end of the research underlying layout structure in the asymmetric case properties.Main researches been done list as follows:①Determine a reasonable finite element model to simulate the underlyingframework-the framework of the earthquake resistance of masonry buildings beams,columns, shear walls and masonry walls, and select the appropriate concrete, steel,masonry material model and using the ABAQUS finite element analysis software toestablish the structure of three-dimensional finite element of the overall model.②The design of the underlying one-way eccentric structure example, each modelof elastic-plastic dynamic analysis, analysis of the static contrast the various models inthe single (double) to the seismic wave eccentric direction of the specimens ofcomponents on both sides of the internal force, displacement and damage eccentricity ofthe class structure of the law.According to the analysis, the paper comes to conclusions below:①From the minor earthquake results of view, compared with unidirectionalearthquake action bidirectional earthquake makes the story displacement, story drift andshear increased, and the impact is mainly concentrated in the bottom frame and uppermasonry story. The model which relative eccentricity is2.67%is less affected by bidirectional seismic action. In designing, there is no need to consider its influence.Bidirectional seismic action has obvious effect on the model which relative eccentricityis6.44%and8.33%, it should be taken into consideration in designing.②Strong earthquake results show that compared with unidirectional earthquakeaction bidirectional earthquake makes the story displacement, story drift increased, atthe same time the impact is mainly concentrated in the bottom frame and upper masonrystory, especially in the bottom frame. The bidirectional horizontal seismic action makesserious damage on the structure of bottom frame and upper masonry story, and mostserious damage at the bottom frame. In designing, should strengthen the structuralmeasures of bottom and the upper masonry story.③With the increment of relative eccentricity of the first floor，bidirectionalearthquake makes the story displacement ratio, story drift ratio and shear ratio increased,and the impact is mainly concentrated in the bottom frame. The damage degree of thebottom and upper masonry story under bidirectional seismic action is much higher thanthat under unidirectional seismic action and the impact is mainly concentrated in thebottom frame.