Research On Seismic Behavior Of High Performance-spoil Fired Block Masonry Wall With Core Columns

In recent years,with the promulgation and implementation of a series of policies related to sustainable development,such as "circular economy","energy conservation and emission reduction" and the development of green new building materials,it has been an irresistible trend to vigorously develop new building materials.High performance-spoil fired block is a kind of high performance based on solid waste research and development of new energy-saving insulation wall construction material,block surface roughness is extremely high,has the characteristics of high rate of holes,with light weight,high strength,saving soil,waste a lot of advantages such as,tie-in thin mortar joint construction technology in engineering,and reduce the heat and cold bridge effect,heat preservation and heat insulation effect is good,has the broad prospects for development and the application market.In this paper,the basic mechanical properties of the high performance-spoil fired block and the mortar are known through the compressive strength test of the high performance-spoil fired block,the compressive strength test of the masonry,the shear strength test of the masonry and the compressive strength test of the supporting special mortar,which provides a basis for the seismic performance test study of the high performance-spoil fired block wall.Then,the seismic performance of high performance-spoil fired block masonry walls with core columns was studied.A pseudo-static test was carried out on 8 walls with a scale ratio of1:2.The design variables included 3 groups of vertical compressive stress,4 groups of core columns,and 2 groups of core column steel bars.The relevant representative seismic performance parameters,including hysteresis curve,skeleton curve,deformation and ductility,stiffness degradation,energy dissipation and other characteristics,are studied.The results show that with the increase of vertical compressive stress,the cracking load and ultimate load of masonry wall increase significantly,and the energy consumption increases,but the ductility of the wall decreases.With increasing the number of core columns,the integrity is improved,and the cracking load and ultimate load are obviously increased,but the ductility is disadvantageous.Increasing the amount of rebar in the core column can improve the performance of all aspects,which is manifested by the obvious increase of load value at characteristic points,the overall ductility and energy consumption.And according to the result of the test data of 8 pieces of wall,combining with the relevant specification and chu-xian shi and masonry structure li-hong xiong teacher of the wall of the seismic shear capacity calculation formula analysis method,put forward in this paper,the research of the high performance-spoil fired block masonry walls with core columns of seismic shear bearing capacity formula of advice,for design and calculating the class block masonry wall to provide a certain basis.Finally,based on the experiment,using the tri-linear curve of restoring force model of skeleton curve of feature point and according to the test data,simulate the skeleton curve equation,and to discuss the restoring force model of the specimens,and gives the formula to simulate the stiffness degradation,improved hysteresis rules,considering the limit load load stiffness of the back drop,the resulting simulation hysteresis curve,good results,It shows the effectiveness of the model method.