This paper investigates the applicabilty of an innovative bracing, called Articulated Quadrilateral (AQ) bracing system, which uses shape memory alloys (SMAs), for retroffiting low-rise to high-rise vulnerable SMFRs against strong ground motions. The paper investigates brace fundamental engineering characteristics, design of the system and also configuration of the brace (the proportion of SMA ...

The cross-laminated timber coupled wall (CLT-CW) system, a recently proposed timber-based structural has limited understanding of its seismic performance. existing research in probabilistic fragility assessment (PSFA) CLT buildings reveals gap, particularly regarding comprehensive evaluation CLT-CW systems and the impact various design parameters. To fully describe state post-earthquake perform...

A mainshock is usually accompanied by a group of ground motions. In many design codes, the effects seismic sequences have been neglected or underestimated. Aftershocks can increase structural damage even cause failure. The current study evaluated behavior rehabilitated and as-built reinforced concrete (RC) structure under real scaled mainshock-aftershocks using nonlinear analysis. Verification ...

This paper presents the key design points of buckling-restrained braced frames (BRBFs) by using the performance-based plastic design (PBPD) methodology. This method is based on energy-work balance concept and uses pre-selected target drift and yield mechanism as design criteria. Based on multi-mode pushover and time-history analyses, a simple equation is developed for computing yield drift rati...

This work investigates and discusses the effectiveness of seesaw system when installed in an older, non-ductile reinforced concrete (RC) building for seismic upgrading purposes. In particular, two different configurations are assumed a two-storey 3D RC framed which was designed according to older provisions and, thus, is susceptible flexural shear failures. To check if there any merit employing...

This paper presents the analysis of seismic response and identification dynamic properties an equivalent linear time-invariant model a full-scale five-story base-isolated reinforced concrete building tested on unidirectional [email protected] shake table. A sequence seven scaled historic earthquake records was applied by table to building, progressively increasing demand structure its nonstruct...

After learning from several devastating earthquakes in China in recent years, stricter design criteria have been introduced in the current Chinese seismic design code. To investigate the reliability of the current seismic design code, seismic fragility analyses were performed for 45 10-story reinforced concrete (RC) frame-shear wall structures designed according to the current Chinese seismic d...

Need for designing certain important structures to resist blast loads is increasing in the recent past years, due to the enhanced terrorist operations. A bomb explosion can cause very serious damage on the building's external and internal structural frames. Collapse of one structural member in the vicinity of the source of explosion, may then create critical stress redistributions and lead to c...