The use of wireless sensors in Structural Health Monitoring (SHM) has increased significantly the last years. Piezoelectric-based lead zirconium titanate (PZT) have been on rise SHM due to their superior sensing abilities. They are applicable different technologies such as electromechanical impedance (EMI)-based SHM. This work develops a flexible smart sensor (WSS) framework based EMI method using active for full-scale and autonomous In contrast passive sensors, self-sensing properties PZTs...

This study presents a stochastic model of near-periodic walking force signals featuring variable speed on the step-by-step basis as key input modelling parameter. is notable departure from traditional deterministic and periodic Fourier series models where parameter average pacing rate in trial. Walking instead more natural choice since human nervous system adopts successive steps to surrounding environment, including vibrations supporting structure. Starting previously developed...

Human walking is a decisive excitation when checking vibration serviceability of several kinds structures. Advanced models load are needed to obtain realistic checks. This paper includes the study spatiotemporal parameters human walking, which have strong effect on structural dynamic response. An advanced statistical model intended simulate temporal evolution these sought. The modeling integrates previous related findings in biomechanics and results campaign treadmill tests. original model,...

Contemporary design codes and guides for vibration serviceability assessment include some simplifications in load modelling. The same statistical distribution of the inter-pedestrian variability step interval (frequency) is proposed all applications. Moreover, walking loads are considered to be periodic. intra-pedestrian neglected. A more realistic modelling trying overcome limitations intended this paper. Instead a single mean value speed, range possible variation, which account real...

This work shows an experimental procedure aimed to generate a graph with the optimal roughness parameters in order obtain best measurements of optoelectronic profilometer. The have been determined taking into account grade agreement between optical values and equivalent traditional contact devices. working profilometer are based on computational filters which controlled by software 3D stratified colour map (chromatic fragmentation white light). However, these substantially differ from usual...

The objective of this work is to analyse the conformity roughness parameters measured with an optoelectronic profilometer in order make equivalent measurement results those obtained traditional contact devices. working are based on computational filters which controlled by software a 3D stratified colour map (chromatic fragmentation white light). However, these substantially differ from usual profilometers that 2D profiles (cut-off, evaluation length, stylus radii). This pursues find optical...

The nonlinear modeling and identification of a four-storey steel frame is presented in this paper. bending modes the were experimentally isolated by single-point mono-harmonic excitation used for purposes. A novel expeditious procedure was developed to infer kind nonlinearities present structure. This turned out be most critical task process. proposed model calibrated time domain fitting model-predicted responses experiments. posed as minimization an error function means new adaptive...

A design spectrum of characteristic acceleration response to pedestrian-induced dynamic loading has been developed for footbridge structures. The novelty the proposed over existing spectra is that: (1) it underpinned by a recently comprehensive statistical model pedestrian loading; (2) applicable broader natural frequency range structures up 10 Hz; and (3) accounts uncertainties in both structure dynamics that are typically encountered structural design. In addition, importance correct...