| At present our country is in a stage of rapid development, construction industry and manufacturing industry having been growing fast,so as the city renewal speed. Along with it, a lot of waste concrete and waste fibers have been produced. Nowadays the treatment of these wastes has become a major problem of the environmental governance. And the development of the construction industry consumes a lot of natural resources. Reusing the abandoned concrete and waste fiber, making into new concrete, not only can save raw materials,but also can protect the environment,having great significance for the sustainable development of our country.In this paper, by changing the recycled aggregate replacement ratio, waste fiber length, waste fiber incorporation, slenderness ratio, to study the beam-column joint of the waste fiber recycled concrete. All told, having designed of ten test specimens, using the nonlinear finite element software ABAQUS, simulates the specimens. Studying the hysteresis curve, skeleton curve, stiffness degradation and the dissipation capacity of the test specimens. Analysis and contrast the best mixing amount of test specimens under different influencing factors. Having got the following conclusion:a. Waste fiber recycled concrete beam-column joint and the common concrete beam-column joint have the similar failure process, including elastic deformation stage, crack development stage, and failure stage. As can be seen from the specimen damage nephogram, the destruction of the test specimensb. Adding the waste fiber into the test specimens can enhance the seismic capacity, the hysteresis curve and the skeleton curve of each specimen are very similar.c. The hysteresis curves of the beam-column joint of the waste fiber recycled concrete are very full,and with other content unchanged,the specimen without recycled aggregate is better than the other two groups. When the waste fiber length is 19mm and incorporation was 0.12%,the axial compression ratio is 0.4 the aseismic stability is the best.d.The skeleton curve of the waste fiber recycled concrete the specimens are basically the same.The bearing capacity at the later stage is better than the common concrete.e.There's no Stiffness mutation of the waste fiber recycled concrete,the stiffness degradation is gentle the aseismic stability is good.f.the specimen with the waste fiber length 19mm and incorporation 0.12%,the axial compression ratio 0.4, the mixing amount of the recycled aggregate is 0 or 50% the properties are the best. |
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