Test Analysis Of Block Masonry Seismic Wall And Structural Seismic Failure Analysis

In this paper,ABAQUS finite element simulation is carried out on the concrete small hollow block masonry wall with certain horizontal steel mesh,vertical steel bar and core column.By comparing the simulation results with the existing test results,the constitutive parameters of the set concrete hollow block wall are discussed whether they are reliable or not.At the same time,based on the above,the seismic damage pattern of the two multi-storey block masonry structure models is analyzed,and the bending damage of the block masonry is simulated by comparison.The detailed research work is as follows:(1)This paper briefly introduces the advantages and disadvantages of the concrete hollow block masonry structure,and then expounds the damage pattern and the harm of the concrete hollow block masonry under the action of earthquake.The research status and problems of concrete hollow block wall in recent years are introduced.(2)A concrete hollow block wall specimen named iv-ab1 is introduced.Firstly,the design requirements and general situation of the specimens are introduced.Based on the design requirements,the fabrication and installation process of the wall specimens and their related testing and loading instruments are described.Then the loading system and experimental phenomena of the specimen are described briefly.Finally,the results of the experiment are described briefly.The common failure modes of concrete hollow masonry walls are expounded and the main factors affecting the seismic bearing capacity of concrete hollow masonry walls are analyzed.(3)In this paper,ABAQUS finite element analysis software is used to simulate the nonlinear finite element of concrete block specimens.Firstly,the constitutive relationship between concrete block wall and steel bar and the relevant parameters of L steel beam are proposed.Then,the modeling process of wall model in ABAQUS and the matters needing attention in each step of modeling are introduced in detail.Finally,the failure process and failure pattern of the wall under horizontal reciprocating load are introduced.Through ABAQUS post-treatment,the hysteresis curve,ductility coefficient,damping ratio and other seismic performance indexes of the specimen under the action ofreciprocating load were obtained.Through the comparison of these data and the experimental data,the rationality of the model is verified,and the reliability of constitutive parameter setting is also verified.It is proved that ABAQUS can accurately simulate the concrete hollow block masonry structure.At the same time,the problems encountered in the modeling process of ABAQUS and the solutions are summarized.(4)The elastoplastic failure pattern of a multi-storey masonry structure was analyzed by ABAQUS.Based on the material constitutive structure studied above,two models are established,and the basic situation of the two models is described in detail.Then the selection principle of seismic wave and the selected seismic wave are introduced,and the modal analysis of model 1 is carried out.Finally,the failure modes of the two under earthquake action are compared,which are discussed from compression damage and tension damage respectively.It can be obtained that the concrete block masonry with a certain amount of horizontal steel mesh and vertical inserted bars will improve the bearing capacity of the structure and cause the structure to bend and fail,that is to say,the reinforced block masonry can effectively resist the earthquake...