Adding steel braces to reinforced concrete frames is a common way for seismic rehabilitation of these structures. Due to ease of installation and the possibility of creating openings in the braced bays, this method of rehabilitation has been more preferred than using shear walls. In this paper, three experimental specimens including a reinforced concrete frame, a reinforced concrete frame with ...

an experimental study is conducted on three ½ scales, single-story, single-bay, frame specimens. the first specimen was a reinforced concrete frame with solid-brick infill. the second specimen was a reinforced concrete frame with hollow clay perforated-brick infill. the last specimen was a reinforced concrete frame without any infill. these three specimens were tested by pseudostatic method. di...

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...

beam to column welded connection with radius cut on beam flange is known as rigid connection that provides acceptable ductility for special moment resisting frame (smrf). in order to decrease the cost of construction and to provide an easy-to-construct structure, the new method is available for reducing the beam section based on drilling on beam flange , known as drilled flange connection (dfc)...

The ability to perform accurate nonlinear simulations is a key component in the assessment of the behavior of seismic force resisting systems. A three-dimensional distributed plasticity formulation for composite beam-columns suitable for nonlinear static and dynamic analyses of composite seismic force resisting systems has been developed. New uniaxial constitutive relations are developed for th...

Modular systems have been mostly researched in relatively low-rise structures but, lately, their applications to mid- to high-rise structures began to be reviewed, and research interest in new modularization subjects has increased. The application of modular systems to mid- to high-rise structures requires the structural stability of the frame and connections that consist of units, and the eval...

Reinforced concrete tall building failure, in residual areas, can cause catastrophic disaster if they can’t survive during the destructive earthquakes. Hence, determining damage of these buildings earthquake and detecting probable mechanism formation are necessary for insurance purposes urban areas. This paper aims to determine failure modes moment resisting frames (MRFs) according beam column....

Abstract Seismic activity in the last two decades validate urgent improvement requirement of ductile seismic design concept for MR RC frame structures. This necesity comes from unfavorable recorded response structures required to on-site actions. The same observations and conclusions (regarding soft storey ( G round F loor (GF) or C urrent (CF)) mechanism development energy dissipation process ...

Progressive collapse starts when any load-carrying elements of the building during extreme loading, such as earthquakes, blasts, or fire. The Precast Steel Reinforced Concrete (PSRC) buildings comprise precast RCC columns and steel girders. These structural are connected to form a moment-resisting frame susceptible progressive collapse. However, this system has advantage inherent stiffness damp...