KARAKTERISTIK PASCA ELASTIK DINDING PANEL STYROFOAM DENGAN TULANGAN HORIZONTAL AKIBAT BEBAN BOLAK-BALIK

Abstract

An earth quake is natural phenomenon. We can not predict instinctively when it happens and how big the effect will be. The damage after an earth quake on a building in general occurs in the non structural particularly on the wall rather than on its structure sector. The effect of non-structure damage may suffer a financial lost or the worst is to fall victims. The materials such as brick or concrete block are having weakness on their brittle. This research is aimed at finding out the behavior of styrofoam panels wall including the load displacement, crack pattern, drift ratio, stiffness, maximum shear strength, shear modulus, damping ratio and ductility. The research was conducted by using three specimens with the dimension of 300 x 300 x 10 cm³, they were one open frame without the infilled wall (RT), one concrete styrofoam wall without horizontal bar (DBSTT) of 10 cm thick, and one  styrofoam panels wall with horizontal bar of f5-250 (DPSDT). The DPSDT used the infilled styrofoam panels with the dimension of 290 x 25 x 7,5 cm³. The test was performed by applying the lateral cyclic load based on the ASTM E 2126-02a. The result is as follow, the additional horizontal bar of f5-250 on styrofoam panels wall (DPSTT) is able to support the maximum structure displacement of 200,137 % from the initial DBSTT. The range of Equivalent Viscous Damping Ratio (EVDR) between DBSTT and DPSDT is not far, but the DPSDT has a structure capability to dissipated external loading up to a significant ductility level (µ > 45). The average load of P_yield on DBSTT is 35,937 kN followed by DPSDT with 18,246 kN initially (based on Equivalent Energy Elastic-Plastic curve). The failure mechanism on DBSTT is shear failure, meanwhile on the DPSDT is sliding failure which occurs along the surface joints between styrofoam panel and mortar.

Keywords: Ductility, brittle, cyclic, RT, DBSTT, DPSDT