Abstract
In this paper, the shear capacity of waste fiber recycled concrete shear wall (FCSW) is studied by cyclic loading tests on 9 specimens. The failure of the specimens under low cycle cyclic loading is analyzed. The influence of waste fiber content, recycled aggregate content and axial compression ratio on the shear capacity of shear wall is studied. The results show that: the larger the volume ratio of waste fiber is, the higher the shear bearing capacity of shear wall is; the addition of recycled coarse aggregate will reduce the shear capacity of shear wall; the shear capacity of shear wall increases with the increase of axial pressure. On the basis of relevant specifications, the calculation formula of in-plane shear capacity of waste fiber recycled concrete shear wall is proposed considering the influence of waste fiber on shear capacity. By comparing with the test results, it can be found that the two formulas are in good agreement. The conclusion of the study can provide reference for the design of waste fiber recycled concrete shear wall.
Highlights
With the rapid development of Chinese urbanization, a large number of waste buildings have been demolished
Comparing the test results of FCSW6, FCSW3 and FCSW7, Figure 6 (b) shows the change of shear capacity of shear wall specimens with recycled coarse aggregate content when the volume ratio of waste fiber is 0.08%
It can be seen from the figure that when the content of recycled aggregate increases from 0% to 50%, the shear capacity of shear wall specimen decreases by 4.85%; when the content of recycled aggregate increases from 50%, the shear bearing capacity of shear wall specimen decreases by 3.69%
Summary
With the rapid development of Chinese urbanization, a large number of waste buildings have been demolished. It resultied in more and more construction waste such as waste concrete. Many scholars at home and abroad began to study the waste fiber recycled concrete, mainly focusing on the material and structural performance. Zhou[9~12] studied the constitutive problems such as splitting tensile strength and compression damage of waste fiber recycled concrete, and the flexural performance of waste fiber recycled concrete beam. The test results show that the splitting tensile strength of concrete can be improved to a certain extent by adding appropriate amount of waste fiber; the uniaxial compression damage test of prism specimen is carried
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