Abstract This study uses a generalized and parametrized reduced-order model in the frequency-domain to evaluate effects of asynchronous excitation on lateral response bridge structures. Bridge geometry parametric regions, corresponding conceptually valley profile shapes, are explored. Both modal bounding analyses, that dependent alone, employed highlight regions where first mode is anti-symmetr...

In many cases, a set of obstacles, such as bridge piers and abutments, are located in the river waterway. Bridge piers disrupt river’s normal flow, and the created turbulence and disturbance causes diversion of flow lines and creates rotational flow. Geometric shape and position of the piers with respect to flow direction and also number of piers and their spacing are effective on changing the ...

In this paper, a novel approach proposed for structural damage detection from limited number of sensors using extreme learning machine (ELM). As the number of sensors used to measure modal data is normally limited and usually are less than the number of DOFs in the finite element model, the model reduction approach should be used to match with incomplete measured mode shapes. The second-order a...

Abstract The masonry bridges on the Kalka Shimla Mountain Railway line, which have multiple arch galleries in form of Roman aqueducts, are spectacular. line is situated severe seismic zones (Indian Standard 1893:2016). This research assesses vulnerability Bridge No. 541 line. bridge tallest route. In particular, it using finite element (FE) analysis. For this purpose, an FE model for developed ...

The fundamental frequency of a rectangular orthotropic plate having an arbitrary thickness variation is computed by using the method of Modi ed Vibrational Mode (MVM) shapes. The change of thickness within a plate is characterized by introducing a tapering index. It is shown that the vibrational mode shapes of a tapered plate is in fact a linear combination of various mode shapes of intact plat...

Railway Bridge Health Monitoring (RHM) is of prime importance as damages in bridges can lead to huge casualties. Wireless sensor network (WSN) has come up as a promising technology for health monitoring. WSN has severe energy and hardware constraints. In this paper, we propose an event detection system for WSN deployed for RHM. Our proposed system takes different constraints of sensor networks ...

in this paper, full scale load test of a horizontally curved steel box-girder bridge is carried out in order to detect structural defects, which reportedly result in unwanted vibrations in nearby buildings. the bridge is tested under the passage of six heavy vehicles at different speeds, so as to determine its static and dynamic responses. a total number of one hundred and two (102) sensors are...