Transmission towers are prone to collapse under strong wind load, resulting in significant economic losses. In order investigate the mechanism and failure modes of transmission tower load whether vibration factor can greatly reflect increasing effect fluctuating wind, finite element method (FEM) is utilized analyze ultimate bearing capacity a typical 220 kV tower. The results show that loads us...

This paper applies the Sobol’ decomposition of a function of many random variables to a problem in structural mechanics, namely the collapse of a two story two bay frame under gravity load. Prior to introduction of this example application, the Sobol’ decomposition itself is reviewed and extended to cover the case in which the input random variables have Gaussian distribution. Then, an illustra...

This work presents the robustness assessment of stiffened thin-walled composite structures in postbuckling, which is based on a new design strategy that satisfies weight, load-based performance and energy-based robustness requirements. In this approach, robustness is understood as collapse insensitivity due a local failure, where global buckling for instance is assumed as a local failure, once ...

pollution of water and soils by heavy metals is an emerging problem in industrialized countries.the present study was conducted to investigate the heavy metals concentration in water and sedimentsamples from ship breaking sites of sitakunda to assess the potential ecological risk posed by heavy metalusing different methods. heavy metals concentration was analyzed by atomic absorption spectrosco...

We discuss this problem through fiber bundle model (FBM) -where a bundle of fibers is subjected to external load and fibers have distributed thresholds. External load is increased quasi-statically -which produces 'bursts' (number of failing fibers) of diffrent sizes. The burst statistics shows a robust crossover behavior near the failure point which can be treated as a signature of imminent fai...

An adaptable algorithm is proposed in this study, which can predict the complete load-shortening curve of a stiffened panel subjected to uniaxial longitudinal compression. The provides an extension existing empirical formulae initially derived for predicting ultimate compressive strength panels. Based on observations from series nonlinear finite element analyses, behaviour panels idealised with...

Identification of critical or weak buses for a given operating condition is an important task in the load dispatch centre. It has become more vital in view of the threat of voltage instability leading to voltage collapse. This paper presents a Fuzzy approach for ranking critical buses in a power system under normal and network contingencies based on Line Flow index and voltage profiles at load ...