Recent perspectives in dynamic testing and monitoring of bridges

Abstract

The paper reviews some of the most recent aspects involved in the dynamic testing and continuous monitoring of bridges. This includes a discussion of testing techniques, instrumentation, modal identification and damage detection. On the basis of their experience, the authors described several case studies in which some of the most recent developments have been used to accomplish different purposes: the

Vibration Analysis of Reinforced Concrete Simply Supported Beam versus Variation Temperature

“…Based on the temperature field analysis in Figure 2 and Euler-Bernoulli beam theory, this paper will analyze the influence of temperature on modal characteristics of simply supported beam from the following aspects: (1) the influence of temperature on the elastic modulus [6]; (2) the influence of temperature on the deflection of beam [38]; (3) the influence of self-stress caused by temperature on modal characteristics.…”

Continuous Dynamic Monitoring of Lively Footbridges

“…Vibration-based Structural Health Monitoring (SHM) techniques have been increasingly used in lively footbridges with the following main purposes: the verification of serviceability limits under pedestrian excitation; the assessment of the efficiency of implemented vibration mitigation measures; and the early assessment of damage [1][2][3]. In this context and during the last decade, the Laboratory of Vibrations and Monitoring (ViBest, www.fe.up.pt/vibest) of the Faculty of Engineering of University of Porto (FEUP) has carried out an extensive research program on this theme, which led to the implementation of continuous dynamic monitoring systems in two lively footbridges [4][5][6].…”

Application of Interferometry Method for Dynamic Continuous Testing of Bridges

“…Typical experimental tests are usually carried out using accelerometers, strain, inductive and wireless sensors [1][2][3]. Most of these sensors require direct contact to the structure for installation.…”