The Research of the Influence of Beams and Columns Internal Forces in Bottom Frame Layer of Masonry Building With Bottom Frame on Filler Walls

During earthquakes, the beams and columns internal forces in bottom frame layer of masonry building could be influenced by filler walls, and the failure modes that not meet the expected design might occurred in the structure. Therefore, the research of its influence on filler walls was of great significance to perfect the seismic design method of such buildings and to improve its seismic performance. In this paper, ABAQUS finite element procedure was used in modeling, and a six-story masonry building with bottom frame of single span was analyzed, besides, the four typical arrangement forms of no filler walls, complete, half-height and half-span filler walls were considered to study the influence of beams and columns internal forces in bottom frame layer. The results showed that after the filler walls were arranged completely, the moment and shear of all positions were decreased except that the shear of right columns in bottom frame layer was increased 1.5 times; After the half-height filler walls were arranged, the shear mutation was appeared in middle of bottom frame layer columns, and the mutation amplitude was 24%∼36% of the original columns shear, and it was easy to occur short column failure; After the half-span filler walls were arranged, the bottom frame layer beams control sections positions were moved to no filler walls side, and the middle of beams shear were increased 6 times to the situation of no filler walls, and it was easy to occur shear failure in the positions of middle spans. Therefore, it was necessary to implement strengthening design in above positions.