On the Performance of a Computational Cost Reduction Technique Applied to Cooling Towers Transient Analysis

Soroushian, Aram; Mehrnoosh, Amin Jahani; Zarabimanesh, Yalda; Ghondaghsaz, Mohammad Hadi; Baiani, Ali; Zakizade, Ali

doi:10.7712/100016.1896.11470

Cited by 4 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results evidence the good performance of the technique. Three significant applications are reviewed in Table 1 (Nateghi and Yakhchalian, 2011;Sabzei, 2013;Bastami, 2014;Garakaninezhad and Moghadas, 2015;Hadad, 2015;Soroushian et al, 2016;Zarabimanesh, 2017;Baiani, 2018;Ghondaghsaz, 2018). In view of the convergence-based mathematics of the technique (Soroushian, 2008), it seems applicable to structural systems subjected to static loadings, that are continuous with respect to the spatial coordinates, while available as digitized records.…”

Section: Introductionmentioning

confidence: 99%

Efficient Static Analysis of Assemblies of Beam-Columns Subjected to Continuous Loadings Available as Digitized Records

Soroushian

Farahani

2019

Front. Built Environ.

Self Cite

View full text Add to dashboard Cite

Beams, beam-columns, columns, and frames, are of major importance in structural engineering, and especially buildings and infrastructures analysis and design. In some cases, these structural members are subjected to static loadings, that though are continuous with respect to the longitudinal axes, are available as digitized records. Finite element analysis of assemblies of these members may be computationally expensive when the loading is digitized densely. In order to reduce this computational effort, attention is paid to a technique originally proposed in 2008 for reduction of the computational effort in time integration analysis. In view of the convergence-based nature of this technique, in this paper, the technique is adapted to static analysis of assemblies of beam-columns subjected to digitized loadings. The good performance of the adapted technique is demonstrated from different points of view, and is compared with the performance of the technique in time integration analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Efficient Static Analysis of Assemblies of Beam-Columns Subjected to Continuous Loadings Available as Digitized Records

Soroushian

Farahani

2019

Front. Built Environ.

Self Cite

View full text Add to dashboard Cite

show abstract

“…convergence [17,18], a technique is proposed, for reducing the effect of t f  , in Eqs. (2), such that the analyses can be carried out with considerably less computational cost, with practically unchanged accuracy [19]; several theoretical studies and numerical investigations are carried out regarding the technique [19][20][21][22][23][24][25][26][27][28][29][30][31], successfully. In continuation, in this study, attention is paid to the social and practical importance of low to mid-rise residential buildings, and the performance of the technique in time integration analysis of thirty five-to twenty-story buildings (with different structural systems and geometries) are studied in detail.…”

Section: Introductionmentioning

confidence: 99%

On the Performance of a Structural Analysis Cost Reduction Technique When Applied to Residential Buildings

Reziakolaei¹,

Sabzei²,

Soroushian³

2014

Proceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

View full text Add to dashboard Cite

Time integration is a versatile tool in structural dynamic analysis, suffering from considerable computational cost and inexactness in responses. For the special case of analysis against digitized excitations, recently a technique is proposed for integration with steps larger than the steps of excitation, and is successfully implemented in several practical analyses. In view of the social and financial importance of residential buildings, with five to twenty floors, in this paper, the performance of the recent technique regarding the structural systems of these buildings is examined and specifically it is demonstrated that even with no a priori knowledge about the structure and response, and independent of the analysis method, we can halve the computational cost in the price of trivial loss of accuracy.

show abstract

Identification of damping ratio and its influences on wind‐ and earthquake‐induced effects for large cooling towers

et al. 2018

Structural Design Tall Build

View full text Add to dashboard Cite

Summary Standard 5% damping ratio for high‐rise concrete structures is generally used for dynamic analysis under the action of wind and earthquakes in the existing cooling tower regulations and researches. But considering the unique configuration and material attributes of large cooling towers, the actual damping ratio must be far smaller than the recommended. However, only a few field measurements of damping ratio for large cooling towers have been conducted; neither are there thorough investigation into the qualitative and quantification of wind and seismic effects under different damping ratio. To fill this gap, field measurements of a large cooling tower standing 179 m in northwestern China was performed and acceleration vibration signals at representative positions of the tower under ambient excitation were obtained. The vibration signals were preprocessed combining random decrement technique and natural excitation technique. Three pattern recognition methods (auto‐regressive and moving mean model, Ibrahim time domain, and spare time domain (STD)) were applied to analyze the frequencies, damping ratios, and modes of vibration for the first 10 order modes. Following the line of thought of modal combination, the equivalent synthetic damping ratio was derived. Under 5 damping ratios (0.5%, 1%, 2%, 3%, and 5%), a comparative analysis on the dynamic responses of the cooling tower to wind and single seismic loading by using full transient method was performed. On this basis, the patterns of influence of damping ratio on wind‐induced vibration, wind vibration coefficient, and time history and extrema of seismic responses were extracted. Finally, different combinations of dead weight, wind, temperature in winter, sunshine duration, and seismic intensity and those of accidental seismic effects (8 working conditions) were considered, using equivalent synthetic damping ratio and standard damping ratio. Thus, the most unfavorable working conditions were identified under actual and standard damping ratios for the large cooling tower. Our research findings provide reference for determining the value of damping ratio in large cooling towers and deepening the understanding on the influence mechanism of damping ratio.

show abstract

On the Performance of a Computational Cost Reduction Technique Applied to Cooling Towers Transient Analysis

Abstract: Abstract. Time integration is a versatile tool in transient analysis

Cited by 4 publications

References 9 publications

Efficient Static Analysis of Assemblies of Beam-Columns Subjected to Continuous Loadings Available as Digitized Records

Efficient Static Analysis of Assemblies of Beam-Columns Subjected to Continuous Loadings Available as Digitized Records

On the Performance of a Structural Analysis Cost Reduction Technique When Applied to Residential Buildings

Identification of damping ratio and its influences on wind‐ and earthquake‐induced effects for large cooling towers

Contact Info

Product

Resources

About