| In this article,general finite element software ABAQUS was used to study the influence factors on seismic performance of masonry structure with multi-opening longitudinal walls.The main research work of the thesis is as follows:Firstly,a brief description to the FEM software ABAQUS was conducted,which was mainly about a detailed introduction to the constitutive relations,failure criterion,and parameter setting of each material types.At the same time,the concrete damaged plasticity model was discussed in the second chapter.By means of the numerical simulation of pseudo-static tests on the two experimental walls and the substructure model of teaching buildings,the experimental results were compared and analyzed to verify the rationality of parameter setting.Next,seventeen specimens of multi-opening longitudinal wall model of brick masonry were designed in ABAQUS.It was analyzed that the effect of different constructional measures,such as middle structural column,reinforced concrete horizontal beam and frame column,etc.Even,the reinforcement radio and section dimension of middle structural column were analyzed in detail to put forward the optimal reinforcement ratio and section dimension of the column.Then,it was discussed that the influence of different opening rates and opening modes on the seismic performance of models.Finally,finite element models of masonry structure under different constructional measures were established.The seismic performance of the model was researched by observing and extracting the tensile damage parameter curve of walls and the inter-story displacement angle under the rare earthquake of magnitude 8.Meanwhile,the seismic characteristic and the matching of longitudinal and lateral wall were also verified under the rare earthquake of magnitude 9.Based on the above conclusion,it was studied that the influence of layer number on the models with different constructional measures.Thus the corresponding suggestions are given for the aseismic design on multi-opening longitudinal wall of masonry structure. |
