Multi-level shaking table tests were performed on a 1:3 reduced scale two-story reinforced concrete (RC) intermediate moment resisting frame (IMRF) conforming to the requirements given in ACI-318-19. The exterior joints lacked shear reinforcement assess viability of ACI model recommended for determining design strength beam–column joint panel. One horizontal components 1994 Northridge earthquak...

One of the methods for retrofitting reinforced concrete moment frames is the use of steel braces. In this research, the seismic performance of a double-skinned concrete framing system reinforced with two concentric (CBF) and eccentric (EBF) steel bracing, was investigated under seven near-fault earthquake records of varying intensity. For this purpose, two ten-story concrete frames with five sp...

Lightweight cold-formed steel (CFS) framing is an effective building solution for low and mid-rise structures. However, systems level response and component contributions as well as their interactions such as those from lateral-load resisting systems, floor diaphragms, studs to track connections, etc., are not fully understood. Existing building codes for the CFS frame buildings are based solel...

Vertical combination of different seismic resisting systems, permitted in the design codes such as ASCE/SEI7-16, is an effective choice for structural mid- and high-rise buildings. In analysis structures, according to codes, estimate fundamental period vibration needed. On other hand, there no simplified equation compute mixed buildings with vertical systems. this study, by using Rayleigh’s met...

Buildings damages due to earthquakes generally happen because designs of the buildings do not consider earthquake resistance aspects and fulfil technical standards resistant buildings. The structure designed in this work was a seven-storey office building, with symmetrical design plan. earthquake-resisting system used dual special moment resisting frame (SMRF) shear wall for reinforced concrete...

In this study, constant-ductility optimization algorithm under a family of earthquake ground motions is utilized to achieve uniform damage distribution over the height of steel moment resisting frames (SMRFs). SMRF structures with stiffness-degrading hysteric behavior are modeled as single-bay generic frame in which the plastic hinge is confined only at the beam ends and the bottom of the first...