Building Damage Subject to The 27th May 2006 Yogyakarta Earthquake: As Consequence of Unclear Code, Desemination, or Construction?

Widodo Widodo


Nowadays, there are many problems existing in both design and construction of reinforced concrete struc-tures. An example of those problems was structural damage caused by the 27th May 2006 Yogyakarta Earthquake. In order to reduce similar structural damage in the future, it is necessary to investigate the buildings in many aspects including current and previous codes dissemination as well as material and con-struction qualities in the reinforced concrete structures. Field investigation on the structural damage cov-ering several aspects has been conducted. The investigation included several engineered reinforced con-crete structures not only for heavy and moderate damaged structures but also light damaged buildings as well. Inadequacy of the structural design and its building constructions has been identified to meet the cur-rent codes, i.e. PBI 1971, SK SNI 1991 and RSNI 2002. The result shows that serious damages in the rein-forced concrete structures were mainly caused by the several basic defects in the design and construction, such as inappropriate seismic-design philosophy, lack of structural strength, building configuration prob-lem, building sway mechanism problem, short element effect, shear reinforcement problem, and poorly code dissemination process. Based on this investigation, valuable lesson learned for future structural dam-ages in the reinforced concrete can be withdrawn.

Keywords: strong column weak beam, joint failure, shear failure, short column, structural pounding