Studies on Flexure Characteristics of Bamboo-Reinforced Concrete as an Element of Triple Friction Pendulum Damper

Abstract

This study aims to investigate the flexural characteristics of base isolation plates made from bamboo-reinforced concrete with dimensions of 420 mm x 420 mm x 180 mm. Bamboo reinforcement was used at the inner-edge of the plate and steel reinforcement was used in the inner part of the plate. The independent variables were concrete compressive strength of 28,5 MPa and 33,7 MPa and bamboo reinforcement ratio and steel reinforcement ratio of 0.00833 and 0.00838 respectively. The bamboo reinforcement used Gigantochloa apus with an ultimate tensile strength of 177,39 MPa. And yield tensile strength of steel reinforcement 628.5 MPa. To reduce friction on concrete, the concrete surface was covered with CFRP which was attached using an epoxy and resin mixture. The results showed that the bending load capacity of the plates with fc' 28,5 MPa and 33,7 MPa compressive strength was 112.1 kN and 111.9 kN respectively. From the graph of the curvature moment relationship, it is shown that the plate with fc' 28,5 MPa compressive strength has higher ductility than that with fc' 33,7 MPa. From the crack pattern, it is evident that the failure occurred as flexural failure of all specimens.