Study On Seismic Behavior Of High Strength Reinforced Concrete Structure

With the progress of science and technology,building materials turn to become higher strength,better performance and lighter weight,It is the trend of development in the future to use high strength reinforced concrete material instead of the ordinary reinforced concrete.At present,the research on high strength reinforced concrete structure is not comprehensive and thorough.Accounting for these problems.The mechanism of reinforced concrete joints and the mechanical properties of high strength reinforced concrete are studied in this paper The theoretical analysis,numerical simulation,pseudo static test and practical engineering design were used to study the high strength reinforced concrete structure.The specific work as follows:(1)The pseudo-static test of high strength reinforced concrete structure is carried out.Based on a practical frame structure,four sets of test models of the side joints of the two groups with the scale ratio of 1:2 were designed and manufactured.The pseudo static test was carried out to test the failure process,failure mode,hysteretic curve,skeleton curve,ductility coefficient and other related parameters was obtained.The test results show that: the strength of high strength reinforced concrete test joints is higher than the ordinary reinforced concrete,but the ductility and energy dissipation capacity are relatively poor.(2)The nonlinear numerical simulation of the test model is carried out by using ABAQUS finite element software,the stress and strain nephogram of each stage of the test model is obtained,and the correctness of the finite element analysis is verified by comparing with the stress of each stage of the test model.(3)Take a student apartment as an example,According to the design requirements,the ordinary reinforced concrete frame structure model is established,according to the same load,the high strength reinforced concrete model is established with reduced section size,Study on the seismic performance of two kinds of frames subjected to seismic response of 6 degrees by using response spectrum method and time history analysis method.Compared with the two kinds of structures,the inter story displacement and inter story drift angle can be found that,high strength reinforced concrete frame layer displacement and inter story displacement angle increases slightly,but the growth is not obvious.It is indicated that the high strength reinforced concrete structure can be used to replace the ordinary reinforced concrete structure in low intensity region.(4)Ordinary reinforced concrete and high strength reinforced concrete material were designed according to the standard requirements of the above specification,Comparative analysis of steel and concrete,the results show that the use of high-strength reinforced concrete material consumption savings of 17.9%,the amount of concrete to save 33.8%,To promote the use of high-strength concrete has considerable economic and social benefits...