Field deployment of wireless sensors is a necessary first-step towards validating their performance within the complex and challenging environments posed by civil structures. In this study, a wireless structural monitoring system, assembled from low-cost wireless sensor prototypes, is deployed upon the Geumdang Bridge, Korea. The wireless monitoring system is installed on the concrete box girde...

scouring is the removal of sediment particles resulted from variations of flow pattern. local scour is considered among the reasons of instability and ultimately failure of bridges. during the past decades, different methods were proposed against local scour at bridge piers. these methods can be broadly classified into two categories: flow-altering and bed-armoring methods. each method can be c...

This paper presents the dynamic modeling and design of micro motion compliant parallel mechanism with flexible intermediate links and rigid moving platform. Modeling of mechanism is described with closed kinematic loops and the dynamic equations are derived using Lagrange multipliers and Kane’s methods. Euler-Bernoulli beam theory is considered for modeling the intermediate flexible link. Based...

The trans-admittance-mode (TAM) might act as a transforming bridge for voltage-mode to current-mode conversion. In this study a new low voltage operated electronically tunable TAM biquad filter structure realizing all the seven standard filtering functions namely; low-pass (LP), band-pass (BP), high-pass (HP), regular-notch (RN), low-pass-notch (LPN), high-pass-notch (HPN) and all-pass (AP) fro...

To rigorously evaluate the health of a steel bridge subjected to vehicle-induced fatigue, both detailed numerical model and effective fatigue analysis methods are needed. In this paper, process for establishing structural monitoring (SHM)-oriented finite element (FE) assessing damage is presented large, specially shaped arch bridge. First, meticulously modeled using multiple FEs facilitate expl...

When a vehicle passes over bridge, it may jump on the bridge due to damaged expansion joint. The sudden induces heavy dynamic impact and therefore damages deck girder. traditional amplification factor defined by current design code shows of static effects bridge. However, only concerns stable moving load induced vehicle. joint sometimes exceeds allowable load, so is important evaluate in practi...

The dynamic characteristics of long-span suspension bridges are complex. natural vibration frequency is changed with different structural parameters, and the sensitivity to parameters different. In order solve this problem, spatial model a bridge was established by using finite element software, first 20 periods, frequencies modes were analyzed calculated. accuracy obtained data verified throug...

Wireless sensor networks have attracted attention as a possible solution for applications of periodic and continuous structural health monitoring. Ensuring synchronous data acquisition across wireless nodes in large networks of sensors spatially distributed on a structure is of critical importance for many methods of structural health monitoring, especially those based on analysis of vibration....

Even though prefabricated steel Bailey bridges have been used for more than 80 years, limited studies of their structural features conducted, most which do not consider response in operational conditions. This study aimed at determining the modal parameters a 30.48 m length Triple-Single (TS) bridge based on traffic-induced vibrations and comparing them with numerical results. Low-cost improvis...