Seismic evaluation of Steel Buildings with Different Lateral Force-Resisting System and Ductility.

Abstract

The objective of this study was to assess the seismic performance of steel structures with different structural systems, ductility and locations. The structural systems used in the study were divided into three categories: 1. Moment Resisting Frame 2. Concentric Braced Frame 3. Eccentric Braced Frame in each structural system consists of 3 ductility 1. Ordinary 2. Intermediate 3. special ductility of 8 floors buildings located in Mueang Chiang Mai and Bangkok. The design and assessment the seismic performances of the building were carried out by Nonlinear-Static Pushover Analysis method. The result also shows that, the failure behavior of structural steel building from elastic to inelastic behavior in the capacity curve with concern of masonry wall effects. Capacity curve that shows the relationship between base shear and roof displacement of structural steel building with vary lateral resisting system and ductility. The study is useful for guideline to select lateral resisting system and ductility to designing the earthquake resistant structural steel building. The results found that the Intermediate Moment Resisting Frame had exceeding the overstrength force of 2.36 times. The ability to absorb and dissipate energy depends on the ductility of the structure, which makes the structure more able to absorb and dissipate seismic energy. Regarding the structural impact, it was discovered that a Concentric Braced Frame could resist the strongest earthquake. Furthermore, the influence of the masonry wall improves the building’s earthquake resistance to be around 210%.