Mitigation of collapses of structural systems caused by a strong earthquake shaking is crucial to reduce the potential casualties, injuries and economic losses. Hence, accurate risk assessment of structural collapse under seismic excitations is critical in efforts to promote hazard-resilience of the society. This paper summarizes the authors’ recent efforts for accurate prediction of structural...

Abstract Elastomeric bearings (EB) and lead-rubber (LRB) are used in bridge structures to reduce vehicle vibrations, wind loads, earthquakes. Therefore, studying their stability is crucial ensuring the of system itself. Building upon previously proposed linear partially nonlinear models, two fully models suitable for EBs LRBs this paper. The developed adequately account interaction between hori...

fiber reinforced polymers (frp) have widely used for the purposes of enhances strength and ductility of concrete columns. proper design of such hybrid columns, however, requires a better recognition of the behavior of concrete columns confined with frp. in this paper, the influence of frp thickness, concrete compressive strength, and column size on the performance of eccentrically loaded reacti...

Presently, the general seismic fragility evaluation method for a bridge system composed of member elements with different nonlinear behaviors against strong earthquakes has been to evaluate at element-level. This study aims develop system-level that represents structural system. Because behavior bridges is generally divided into transverse and longitudinal directions, this evaluated in both dir...

The use of buckling restrained braces (BRBs) represents one the best solutions for retrofitting or upgrading numerous existing reinforced concrete framed buildings in areas with a high seismic hazard. This study investigates effectiveness BRBs retrofit (RC) masonry infills. For this purpose, an advanced non-linear three-dimensional model building L'Aquila is developed OpenSees, by accounting ef...

The seismic assessment of existing masonry buildings is based on the prediction of their nonlinear response under lateral loading. This requires a reliable estimation of the force and displacement demand. For this purpose, modelling strategies using structural component elements are widely applied both in research and in engineering practice, since they can provide a satisfactory description of...

Sensitivity analysis of fluid–structure interaction (FSI) provides an important tool for assessing the reliability and performance of coastal infrastructure subjected to storm and tsunami hazards. As a preliminary step for gradient-based applications in reliability, optimization, system identification, and performance-based engineering of coastal infrastructure, the direct differentiation metho...

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...

Abstract In this paper, the parameters optimization of a tuned mass damper (TMD) is presented to enhance seismic performance six-story steel structure based on ductility damage index. Herein, frame modeled nonlinearly in OpenSees software by concentrated plasticity model. Finally, most suitable algorithm selected among several algorithms convergence rate and objective function's values. process...

As a composite material, the damping energy consumption mechanism of fiber reinforced polymer-confined concrete (FRP-C RC) structure is very complex. In previous dynamic calculation models, bond-slip effect for steel bars was often ignored, which would lead to considerable error in response FRP-C RC structures. this paper, new numerical model columns considering established using zero-length el...