Non-linear Numerical Simulation Analysis Of Steel Recycled Aggregate Concrete Column Under Low-cyclic Reversed Loading

As a kind of new environment-friendly green structure, steel reinforced recycledconcrete structure has a comprehensive excellent characteristics of energy saving andenvironmental protection, economic and practical. As an important weighingcomponent of modern building, the pillar’s systematic study is necessary. Inexperimental studies, many factors affecting the performance of the structure will havea certain impact. For each of these factors to achieve analysis, then you will need toconsume a huge amount of financial and material resources, and it is not a short time tomature results. Therefore, in order to better achieve the theoretical study of the newstructure, we can make use of the finite element analysis software aided analysis.In this paper, using finite element software OpenSees to simulate the trial in sevensteel recycled aggregate concrete columns, obtained under low reversed cyclic loadinghysteretic curve and skeleton curve, and compared with the test results, good agreement.The experimental design only considered the replacement ratio of recycled coarseaggregate, the axial compression ratio and the influence of stirrup ratio on the seismicbehavior of columns, therefore, based on the previous simulation the numericalsimulation was carried out in different recycled concrete strength, stirrup strength, steelstrength, steel ratio, and seismic analysis of the hysteresis curves and skeleton curvesare carried out.As the finite element simulation platform with the object-oriented design thoughtbased on the open source，OpenSees in the process of modeling analysis need throughlanguage programming writing command stream to implement the whole process, Therefore, in order to be able to give you a better understanding of the modelingprocess of order flow setting and parameter setting, from the component modeling toanalysis and final output command language is introduced in detail.The results show that: because of the presence of steel largely improved thecharacteristics of recycled concrete brittleness and strength, and steel reinforcedrecycled concrete columns showed good seismic performance. According to previousstudies, steel reinforced recycled concrete composite column can meet the engineeringrequirements on bearing capacity, and solve the problem of the disposal of constructionwaste, and increase the comprehensive environmental and economic benefits.