Analisa Inelastis Portal - Dinding Pengisi Dengan “Equivalent Diagonal Strut”

. Masonry infill panels can be frequently found as interior and exterior partition in reinforced concrete (RC) structures. Since they are normally installed after the main structures (RC) finish and considered as architectural element so their presence is often ignored by engineers. But actually, they tend to interact with the bounding frame when the structure is subjected to strong earthquake load, and thus the collapsed behavior of infilled panels frame will be different against the open frame. In such situation while the infilled panels placed in un event location, such structures that have been design as ductile frame can be changed to be soft storey collapsed. The collapsed behaviors of reinforced concrete frame with infill panel due to lateral force from the earthquake are complicated and non linear. Their behavior is depending on the interaction between frame and infill panel so that it is difficult to predict using ordinary elastic methods. The Equivalent Diagonal Strut Method [Saneinejad and Hobbs, 1995] accounts for elastic and plastic behavior of infilled frames while they are considered as structural component. The method will be utilized to analyze the performance of RC frame masonry-infilled panels from University of Colorado [Mehrabi et al, 1996] that have been loaded until collapsed in their laboratory. The results values are rather lower-bound compared to the experiment and appropriate for design purposes. The empirical parameter taken in the method should be reviewed again if the method will be used as tools for the collapsed analysis of actual reinforced concrete infilled frames