Nonlinear Time History (NTH) analysis is currently the most reliable method for estimating structural behavior. Considerable computational demand and complexity of this method may cause difficulty for its routine practical application. Based on the Methodology of Endurance Time (ET) method, it can estimate the nonlinear response of structures with a much lower computational cost. In this resear...

In recent years, significant advancements have been made in the definition of innovative “minimal-damage structures,” chasing need for more resilient societies against extreme seismic events. this context, moment resisting frames (MRFs) equipped with self-centering damage-free (SCDF) devices column bases and beam-to-column joints represent a viable solution to improve structural resilience dama...

A new method for evaluating the resting direction of the eyes based on the use of afterimages was developed. With this technique, the effect of gaze deviations relative to the individually determined resting direction was investigated among naive subjects. Moderate gaze deviations have no effect on reports of autokinesis. Only at extreme deviations which approach anatomical limits is the direct...

DRIFTS and Knudsen cell study of the heterogeneous reactivity of SO2 and NO2 on mineral dust M. Ullerstam, M. S. Johnson, R. Vogt, and E. Ljungström Gothenburg University, Department of Chemistry, SE-41296 Gothenburg, Sweden Copenhagen University, Department of Chemistry, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark Ford Forschungszentrum GmbH Aachen, Süsterfeldstrasse 200, D-52072 Aache...

Quality control of long-term monitoring data of thousands and millions of individual records as present in meteorological data is cumbersome. In such data series, sensor drifts, stalled values, and scale shifts may occur and potentially result in flawed conclusions if not noticed and handled properly. However, there is no established standard procedure to perform quality control of high-frequen...

Hybrid control system composed of a base isolation system and a magneto-rheological damper so-called smart base isolation is one of effective semi-active control system in controlling the seismic response of structures. In this paper, a design method is proposed for designing the smart base isolation system in order to achieve an effective performance under multiple earthquakes. The base mass, ...

In this paper, a procedure has been presented to develop fragility curves of structures equipped with optimal variable damping or stiffness semi-active tuned mass dampers (SATMDs). To determine proper variable damping or stiffness of semi-active devices in each time step, instantaneous optimal control algorithm with clipped control concept has been used. Optimal SATMDs have been designed based ...

The inter-story drift ratio (IDR) is a crucial parameter in structural health monitoring to judge the safety, stability, and serviceability of buildings. Real-time, continuous, widely applicable detection on IDRs essential. However, current methods present some challenges conducting such detection, including adverse effects from weather, requirement for large amounts space, fragile instruments....