Friday, February 19, 2010


Jurnal Rekayasa Vol 5 No 2 Artikel 03

Azis Susanto
(Staf Pengajar Jurusan Teknik Sipil, Fakultas Teknik Universitas Borneo (UB), Tarakan, Kalimantan Timur)

Iman Satyarno
(Staf Pengajar Jurusan Teknik Sipil, Fakultas Teknik Universitas Gadjah Mada (UGM), Yogyakarta)

ABSTRACT: An earthquake is one of natural phenomena which can not be easily predicted the time it occurs and how big the impact will be. An earthquake mainly brings damage on a non-structure sector of a building such as wall, rather than on its structure sector. It happens mostly because the structure of building has exactly gone through a process of designing as well as analyzing based on the principles of structure estimation, on the other hand the non-structure has not been through such an assessment. As a result, the effect of non-structure damage may suffer a financial lost or the worst is to fall victims. A wall is usually made of brick or concrete block, but they have some weaknesses especially on their weight and brittle. As their weight is too heavy, the dead load of the structure becomes overweight at the moment of an earthquake, consequently for some lower deformation level we can not avoid the cracks because of their brittle.
This was a research on a frame concrete bar with an infilled batafoam wall that conditioned effect of cyclic loading (standart ASTM 2126-02a). It was primary conducted in order to find out the behavior of batafoam wall damage model that consists of relationship among load-displacement, crack pattern, drift ratio, stiffness, maximum shear strength, damping and ductility. It was also aimed at finding out the strengthening effect of horizontal bar on batafoam wall. It used three models of simple frame concrete bar along with their variations; they are one piece of open frame (OF), one piece of infilled batafoam (IB) and one piece of infilled batafoam with horizontal bars of 6-200 (IBHB-200), with dimension 3000 mm x 3000 mm x 100 mm.
The result is that the additional horizontal bar of 6-200 on batafoam wall in initial condition and stabilized condition will respectively increase the peak load capacity equal to 110,38% and 86,74%, failure displacement equal to 292,76% and 516,34%, ductility equal to 14,39% and 112,69%, and maximum shear strength equal to 110,38% and 86,74%, stiffness reducing stability, damping effectiveness and loading duration. The failure type of batafoam wall are stair step through joints and sliding along bed joints.

Keywords : Infilled batafoam, Horizontal bars, Cyclic loading.