Existing Building Structure's Strengthened Technology And Reliability Analysis

At present,there are a number of buildings in service as the safety,using function,or other problem needed strengthened in our country.While we can't certain the existing buildings' strengthening whether reasonable or not,can't certain the reinforced construction's satisfy performance and the function required yet.Given to the above problems,the article takes the example of engineering structure extraction column transformation,to carry out the research.The main research content is as follows:1.Using the finite element software SATWE and SAP2000 to numerical calculate and analyzes the original structure's shear-weight ratio,displacement-ratio and the responce of earthquake.SATWE analysis results show that the the design of original structure is reasonanle;the comparison results between SATWE and SAP2000 show that two kinds of finite element software to calculate the displacement of structure are basically the same;Slightly larger structure internal force difference on the same part,but the difference rate is approximately equal,therefore,SATWE computing results can be used.2.The finite element software SATWE is to be modified structure of numerical calculation,and the calculated results with the original structure's.Analysis show that,the reconstruction has a greate effect on structure stiffness distribution and result the components internal force changing greatil,and these are the key problems in structure's strengthing.3.According to the SATWE results before and after the modification of structure proposed in combination with the key problems of structure reinforcement,and the relevant specification,make the strengthen scheme in the form of tables.And design of the formation of the big span space structure used in the prestressed beam.4.Through literature search and theoretical research,put the concrete and steel,elastic modulus,poisson's ratio as the reliability analysis of random variables;certain the concrete cell strain as the column's reliability analysis index,certain the crack width as the beam's reliability analysis index.Use a column and beam as an example,ansys the component's reliability,and the result shows that the reinforcement scheme can guarantee the structure reliability.