Research On Out-of-Plane Dynamic Behavior Of Dryed-stack Panel

Infilled frame structure has been widely applied to residential building,high-rise buildings,due to its own convenience,flexibility,and endurance resistance.In the 1990 s,some scholars put forward a kind of wall of dry-stacked masonry panel and have done some research on it.Compared with the traditional filling wall structure,dry-stacked masonry panel relies on the interlocking and the friction energy dissipation of the masonry to maintain the stability of the wall.In the early,most scholars has done the seismic performance of the st udy of the panel about the static performance of the infilled wall,however,in practical engineering,the structure of dry-stacked masonry panel actually exist all sorts of complex dynamic loading of the load,therefore,it is particularly important to do something about the dynamic performance research of dry-stacked masonry.Through the preliminary study,we can simplify seismic load as inertia force,at the bottom of the motivation of two basic load,In this paper,the seismic performance of the wall of dry masonry filled wall is studied mainly from uniformly distributed load and bottom excitation.The main work is as follows:Based on the finite element software ANSYS,the model was established and verified by test results.Loaded with uniformly distrib uted load,and the block geometric parameters(the thickness of the block,high length ratio,etc.)for the influence of the outside wall surface mechanical properties are studied,and finally,research in earthquake under the action of the ultimate bearin g capacity of infilled structure with dry-stacked masonry panel.The results show that the ultimate bearing capacity of the wall is decreased significantly with the increase of the thickness ratio.With the increase of block plane size,the wall force is more uniform.Based on the results of finite element analysis,the size effect parameters are introduced,the simplified formula of ultimate bearing capacity is established and the optimal size of block is determined.Based on the previous model,considerin g the role of incentives in the bottom of dry filling wall build by laying bricks or stones overall geometric parameters,the characteristics of their own to load,analyzes the aspect ratio,high thickness ratio,block the compressive strength and the size of dry filling wall of build by laying bricks or stones,the influence of the lateral force resistance.The result of research shows that with the increase of high aspect ratio and thickness ratio,the lateral force resistance of the panel reduced significantly,and increase the compressive strength of block and plane size,the limit of the wall of resistance to lateral force is increasing;Under the excitation at the bottom,the uniformly distributed load and the panel is unidirectional bending.In the end,the simplified calculation formula of the lateral resistance of the wall of the wall is given,which can be used for reference.In this paper,the out of plane load analysis of the dry-stacked masonry panel is carried out by using simple harmonic and ga ussian pulse dynamic load respectively.With the early stage of the wall surface under the action of static loads,comparing the performance outside the wall ultimate bearing capacity,stress distribution and stress pattern in activity of the difference of two kinds of loads,and based on the results of the finite element software,the dynamic loading amplification coefficients are carried out.