Computational Technology Resources - CCP

Keywords: composite floors, structural dynamics, human comfort, human rhythmic activities, steel and composite structures, computational modelling.

Summary

The increasing incidence of building vibration problems due to human rhythmic activities led to a specific design criterion for rhythmic excitations to be addressed in structural design. This was the main motivation for the development of a design methodology centred on the structural system dynamical response submitted to dynamic loads resulting from human activities [1,2,3].

This paper investigated the dynamic behaviour of composite floors (steel-concrete) subjected to the human rhythmic activities. The dynamic loads were obtained through experimental tests conducted with individuals carrying out rhythmic and non-rhythmic activities such as stimulated and non-stimulated jumping and aerobics [2].

The proposed analysis methodology adopted the usual mesh refinement techniques present in finite element simulations implemented in the ANSYS program [4]. Based on the experimental results, human load functions due to rhythmic and non-rhythmic activities were proposed.

The investigated structural system was a typical floor used as a restaurant with an adjacent dancing area. The structural system consisted of long span joists (14m) supported by concrete block walls. The floor effective weight was estimated to be equal to 3.6kPa, including 0.6kPa for people dancing and dining. The effective composite moment of inertia of the joists was selected based on its required strength, ie: 1.1x106 mm⁴ [1,3].

The parametric study considered correlations between analytical and numerical results found in the literature. The peak acceleration values were compared to the limits proposed by design recommendations [4,5], based on human comfort criteria. The results indicated that the limits suggested by design recommendations were not satisfied. Such fact indicated that these rhythmic activities could generate peak accelerations that surpass design criteria limits developed for ensuring human comfort.

References

1: Almeida R.R. de, "Análise de Vibrações em Sistemas Estruturais para Pisos Mistos com Joists Submetidos a Atividades Humanas Rítmicas" (Vibration Analysis of Composite Joist Floors Subjected to Human Rhythmic Activities), MSc Dissertation (In Portuguese), Civil Engineering Post-Graduate Programme, PGECIV, State University of Rio de Janeiro, UERJ, Rio de Janeiro, Brazil, pp. 1-154, 2008.
2: Faísca R.G., "Caracterização de Cargas Dinâmicas Geradas por Atividades Humanas" (Characterization of Dynamic Loads due to Human Activities), PhD Thesis (In Portuguese), COPPE/UFRJ, Rio de Janeiro, RJ, Brazil, pp. 1-240, 2003.
3: Murray T.M., Allen D.E., Ungar E.E., "Floor Vibration Due to Human Activity", Steel Design Guide Series, AISC, Chicago, USA, 1997.
4: ANSYS, "Swanson Analysis Systems", Inc. P.O. Box 65, Johnson Road, Houston, PA. 15342-0065, Version 5.5. Basic analysis procedures. Second edition, 1998.
5: International Standard Organization. "Evaluation of Human Exposure to Whole-Body Vibration, Part 2: Human Exposure to Continuous and Shock-Induced Vibrations in Buildings (1 to 80Hz)", International Standard. ISO 2631-2, 1989.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £145 +P&P)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 88 PROCEEDINGS OF THE NINTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and M. Papadrakakis Paper 304 Vibration Analysis of Long Span Joist Floors Submitted to Dynamic Loads from Human Activities J.G.S. da Silva¹, P.C.G. da S. Vellasco², S.A.L. de Andrade², L.R.O. de Lima² and R.R. de Almeida³ ¹Mechanical Engineering Department, ²Structural Engineering Department, ³Civil Engineering Post-Graduate Programme - PGECIV, State University of Rio de Janeiro - UERJ, Brazil doi:10.4203/ccp.88.304 purchase the full-text of this paper Full Bibliographic Reference for this paper J.G.S. da Silva, P.C.G. da S. Vellasco, S.A.L. de Andrade, L.R.O. de Lima, R.R. de Almeida, "Vibration Analysis of Long Span Joist Floors Submitted to Dynamic Loads from Human Activities", in B.H.V. Topping, M. Papadrakakis, (Editors), "Proceedings of the Ninth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 304, 2008. doi:10.4203/ccp.88.304 Keywords: composite floors, structural dynamics, human comfort, human rhythmic activities, steel and composite structures, computational modelling. Summary The increasing incidence of building vibration problems due to human rhythmic activities led to a specific design criterion for rhythmic excitations to be addressed in structural design. This was the main motivation for the development of a design methodology centred on the structural system dynamical response submitted to dynamic loads resulting from human activities [1,2,3]. This paper investigated the dynamic behaviour of composite floors (steel-concrete) subjected to the human rhythmic activities. The dynamic loads were obtained through experimental tests conducted with individuals carrying out rhythmic and non-rhythmic activities such as stimulated and non-stimulated jumping and aerobics [2]. The proposed analysis methodology adopted the usual mesh refinement techniques present in finite element simulations implemented in the ANSYS program [4]. Based on the experimental results, human load functions due to rhythmic and non-rhythmic activities were proposed. The investigated structural system was a typical floor used as a restaurant with an adjacent dancing area. The structural system consisted of long span joists (14m) supported by concrete block walls. The floor effective weight was estimated to be equal to 3.6kPa, including 0.6kPa for people dancing and dining. The effective composite moment of inertia of the joists was selected based on its required strength, ie: 1.1x106 mm⁴ [1,3]. The parametric study considered correlations between analytical and numerical results found in the literature. The peak acceleration values were compared to the limits proposed by design recommendations [4,5], based on human comfort criteria. The results indicated that the limits suggested by design recommendations were not satisfied. Such fact indicated that these rhythmic activities could generate peak accelerations that surpass design criteria limits developed for ensuring human comfort. References 1 Almeida R.R. de, "Análise de Vibrações em Sistemas Estruturais para Pisos Mistos com Joists Submetidos a Atividades Humanas Rítmicas" (Vibration Analysis of Composite Joist Floors Subjected to Human Rhythmic Activities), MSc Dissertation (In Portuguese), Civil Engineering Post-Graduate Programme, PGECIV, State University of Rio de Janeiro, UERJ, Rio de Janeiro, Brazil, pp. 1-154, 2008. 2 Faísca R.G., "Caracterização de Cargas Dinâmicas Geradas por Atividades Humanas" (Characterization of Dynamic Loads due to Human Activities), PhD Thesis (In Portuguese), COPPE/UFRJ, Rio de Janeiro, RJ, Brazil, pp. 1-240, 2003. 3 Murray T.M., Allen D.E., Ungar E.E., "Floor Vibration Due to Human Activity", Steel Design Guide Series, AISC, Chicago, USA, 1997. 4 ANSYS, "Swanson Analysis Systems", Inc. P.O. Box 65, Johnson Road, Houston, PA. 15342-0065, Version 5.5. Basic analysis procedures. Second edition, 1998. 5 International Standard Organization. "Evaluation of Human Exposure to Whole-Body Vibration, Part 2: Human Exposure to Continuous and Shock-Induced Vibrations in Buildings (1 to 80Hz)", International Standard. ISO 2631-2, 1989. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £145 +P&P)
Back to top	©Civil-Comp Limited 2023 - terms & conditions