The impact of the earthquake incident angle on the seismic loss estimation

Life cycle cost assessment (LCCA) of structural systems refers to the evaluation procedure in which all costs arising from owing, operating, maintaining and ultimately disposing are considered. The implementation of LCCA in structural systems, especially for those that are situated in seismically active regions, requires the calculation of the structural capacity in multiple earthquake hazard levels. Incremental dynamic analysis (IDA) is considered as one of the most efficient procedures for estimating the seismic capacity of a structural system; therefore it can be incorporated into the LCCA procedure. Most of the real world reinforced concrete buildings can be represented accurately only with 3D models; hence the implementation of multicomponent incremental dynamic analysis (MIDA) is required. MIDA is a straightforward procedure where randomness on both record and incident angle is considered. In this work four 3D reinforced concrete buildings are assessed with reference to life cycle cost calculated based on MIDA and the significance of considering randomness on both record and incident angle is demonstrated.