| Because of several large earthquake in recent years, masonry seismic reinforcement work got more and more attention. From the investigation of earthquake hazards, we found that it was the collapse of the masonry building that resulted in the great loss. Analyzing the mechanism of the collapse, we found that walls are the most important elements for masonry building to keep it off the damage of earthquake. If walls are destroyed in the earthquake process, the masonry building will loss the vertical supporting elements to support itself, so it will collapse. Therefore walls should be taken seriously in the anti-earthquake reinforced process of a masonry building. There are large amount of masonry structures in China. Some of them are aged and corroded badly; some of them was built without complying with the national standards; some of them had faults when in designing. These faults caused the lack of the shear capacity of a masonry building. From this, we can see that the assignments for masonry structures’anti-earthquake reinforcement are very hard in China. So if we can find a new and effective method for strengthening the masonry buildings, it will do a good help to reduce the hard assignments.As is the above, walls arc the key elements for masonry structures. Base on the conclusion of the walls’usual faults and general strengthening methods, I analyzed the dynamic performance of a wall which was strengthened by a new method(named "filling core and adding wall method"). The main work:1. The masonry walls’ usual faults and general strengthening methods were concluded.2. We did the parameters’selection work through reviewing literature for masonry structures’ finite element analysis, and got the values of these parameters.3. By using the ANSYS FEM software and coding the APDL program, the dynamic performance of a wall which was reinforced by using the method of filling core and adding wall was analyzed, and the analysis data and images were attained.4. Trough comparing and analyzing the data and images, the relationship between major factors and dynamic performance were found out.5. Trough analysis and formula derivation, we gave the calculation model of "Steel-bar and Inclined-strust" and the calculation formula of shear capacity of the wall which is reinforced by the new method.6. The failure mechanism of reinforced wall under horizontal loading was analyzed.At last, I made a summary of this research and pointed out some issues which should be done a further research. |
