Abstract
In prefabricated buildings, the exterior walls play an important role in the mechanical stability and thermal insulation of the structures. In this study, a new type of precast sandwich wall panel was developed by using recycled aggregate (RA) and basalt-fibre reinforced polymer (BFRP) shear connectors. A series of double shear tests were designed and conducted to evaluate the effect of the insertion angle of the BFRP connectors on their shear performance. Based on the test results, six full-scale precast sandwich panels, including two conventional panels with glass-fibre reinforced polymer (GFRP) needle connectors, were cast and tested under four-point bending loads. The tested parameters included the distribution of BFRP connectors and the RA content. In addition, the flexural performance of the new sandwich wall panel was compared with that of conventional non-composite panels. The results showed that the proposed precast sandwich wall panels exhibited better load bearing capacity and ductility. Smaller insertion angles of the BFRP shear connectors led to greater stiffness and better shear transfer capacity because they closely connected two concrete wythes in the sandwich panels. The new recycled concrete sandwich panel is also a more environmentally friendly alternative to conventional panels for use in the exterior walls of prefabricated buildings.
Published Version
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