Hybrid Coupled Wall (HCW) systems consist of reinforced concrete walls connected with steel coupling beams. HCWs benefit from the superior lateral stiffness walls, while mechanism reduces moment demand at base walls. The present study investigates seismic performance a new HCW system equipped friction-damped self-centering beams and examines efficiency in reducing residual deformations. intende...

The research leading to this paper was prompted by the need to estimate strength and stiffness of Rigid Rocking Cores (RRCs) as essential elements of resilient earthquake resisting structures. While a limited number of such studies have been reported, no general study in terms of physical properties of RRCs, their appendages and adjoining structures have been published. Despite the growing know...

Recent studies have proposed and investigated the use of unbonded posttensioned (PT) bars in bridge substructure systems to improve their self-centering behavior. However, lateral loading resistance capacities reinforced concrete (RC) piers with PT (i.e., RC piers: PRC piers) could be easily compromised by early crushing base compression toe during a seismic event. Hence, order enhance pier int...

INTRODUCTION Transportation is an important iatrogenic endodontic error which might cause failure. This study evaluated the canal transportation caused by Neoniti and ProTaper instruments, using cone-beam computed tomography (CBCT) cross sections. METHODS AND MATERIALS This in vitro experimental study was performed on 40 mesiobuccal roots of maxillary first molars. The teeth were scanned with...

A feasibility study on Usumacinta River sediment-based bricks for resilient housing adapted to both climate change and seismic risks is performed laterally loaded reduced-scale walls. Mortar formulations with different volume ratios of lime sand (2/1, 1/2, 1/4, 1/6) are prepared while types thoroughly investigated, manufactured strength characterized. Commercial fired as reference completed the...

The experience of past prominent earthquakes establishes the fact that the structure’s catastrophes and casualties can be dramatically decreased through the use of self-centering systems. A promising post-tensioned self-centering yielding braced system (PT-SCYBS) has been developed, comprising of two main components, including the post-tensioned wires, exhibiting the desirable self-centering pr...

The addition of a rocking structural system will soften the connection between foundation and superstructure help beam-column connections to become softer than typical ones. These structures, with systems, follow elastic gap opening mechanism seismic response. Post-tensioned prestressed tendons dampers are used in systems enable structure return its initial position (self-centering) dissipate e...