Earthquake Intermal Force And Bearing Capacity Reaearch About Masonry Structure Wall's Entire Section And Specimen Design And Analysis

The multilayer masonry structure is the majority in our country,at the same time,it resulted in the most severe seismic damage in the history. People were focus on the destruction and the analysis of internal forces to the masonry structure walls which are under the effect of the earthquake while the"5.12"WenChuan great earthquake had happened. In this paper we have researched the earthquake resistant engineering and the disaster reduction of the masonry structure, and this research is belonged to the study of NSFC (50978177).First, in order to obtain the research significance and the purpose of this issue, this paper has analyzed the current situation of the internal force analysis and the bearing capacity design of the masonry structure under the earthquake action.Then, for various of walls'shear plane, it has analyzed the entire section wall's internal force connection between the coupling wall-column and the entire section, and come to the conclusion that"the sum of each coupling wall-column's internal force is equaled with the internal force of the entire section".Afterwards, used the finite element analysis software analysis the internal force of vibration borad experimental pattern (SAP2000)and multi-story masonry structure (SAP2000 and ETABS) with equivalent horizontal lateral force,and calculated high-wide radioλand axial-load radio N fA of all entire section walls。Beside, it has the conclusions that: 1) with the increase in masonry building's height, high-wide radioλand axial-load radio N fA decreased; 2)Within the same layer, axial-load radio N fA is closed; 3) the majority of axial-load radio is less than 0.3, but not greater than 0.6, satisfied the requirements of prejudicial press in masonry structure.In the meantime, according to the axial force N , this paper has got the computing formula of earthquake-resistance masonry wall's bearing capacity M R. Then, contrasted and analysised M (V h0 ) and M R (V R h0 ) of vibration borad experimental pattern and multi-story masonry structure's with equivalent horizontal lateral force. Based on the above, based on the wall's shear failure's characteristic that shear fractured by material cracks is more fragile than bend fracture caused by yielding resist-bending steels. Therefore, it's best to control masonry structure have bend failure but not shear failure. To achieve this goal, it has designed shear and non-shear specimens about masonry wall in this paper, at the same time, calculated and analysised and sured shear fracture's specimens'control parameters.At last, selected the test models, ascertained the shear and non-shear specimens'size, made the shear and non-shear specimens and choosed the specimen plant, afterwards, fixed the loading system, gave the test installation diagram and the figure of load setup.