| China is one of the countries with many earthquakes.To improve the seismic performance of masonry infilled walls in modern buildings,there is a need to set up concrete-tie-columns in the corresponding positions of walls to avoid overturning during earthquakes.However,with the development of building industrialization in China,the concrete-tie-column not able to meet the needs of modern constructions due to its complicated technologies,overwhelming processes,difficult constructions,long occupation period,and difficult quality problems to overcome,etc.Therefore,this paper proposes an innovative steel-tie-columns technology to achieve standardized design,industrial production,and rapid installation,and it can improve the seismic performance of infilled walls,to take place of the existing concrete-tie-columns technology.Major contributions about steel-tie-column technology in this paper are summarized as follows:(1)First,according to the relevant technical specifications,the application instructions for steel-tie-columns are compiled,and necessary provisions are made in terms of application scope,material selection,design principles,production engineering and construction requirements.Then,according to the engineering practice,four kinds of steel-tie-column with different cross-sections,which are used in straight walls,T-shaped walls,cross walls and L-shaped walls,are designed.The theoretical calculations also show that the strength,stiffness and thermal deformation of the steel-tie-column in the infilled wall with a thickness of 200 mm meet the requirements of the application.Finally,The design of the steel-tie-column connection products is completed.(2)Considering the universe application and the most unfavorable working conditions,the test choose the steel-tie-column infilled walls and the concrete-tie-column infilled walls with thickness of 200 mm to carry out the out of plane single push comparison test.By comparing the damage,ultimate bearing capacity,displacement and stress changes of two kinds of infilled walls,it is proved that the steel-tie-column not only plays the same role with concrete-tie-column,but is also better than the force performance of concrete-tie-column,can effectively replace the concrete-tie-column.(3)The ABAQUS is used for nonlinear simulation of the out of plane pushover test of steel-tie-column infilled wall.The accuracy of the model is verified by comparing the simulation results with the experimental results.At the same time,the displacement cloud chart and stress cloud picture obtained by simulation can directly and comprehensively render the failure condition and stress characteristics of the steel-tie-column infilled wall,and it verify the rationality of the test point selection.(4)By the ABAQUS simulation method,analyzing a plurality of steel-tie-column infilled walls and concrete-tie-column infilled walls with specified thickness,verify the different height of section steel structure column in infilled wall seismic performance,and it prove the rationality of steel-tie-column.At the same time,the modeling and analysis of infilled walls with different thickness are conducted to guide the application of practical engineering according to the influence of wall thickness on the steel-tie-column and the infilled wall. |
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