Experimental and Numerical Analyses of Single Pedestrian Walking on a Hollow Core Concrete Floor
Tóm tắt
The purpose of this paper is to study experimentally and numerically the dynamic response of a hollow core concrete slab due to a single pedestrian. To achieve this aim, a test structure consisting of six hollow core concrete elements of dimension 10 m × 1.2 m has been built. A finite element model of the structure based on orthotropic shell elements has been implemented. The accuracy of the finite element model has been assessed by reproducing numerically hammer-impact tests. For that, the experimental impact load has been imported to the finite element model. Very good agreements between experimental and numerical results have been obtained. Then, three different single pedestrian walking paths have been tested experimentally. Each of these paths has been reproduced numerically using four numerical load models taken from the literature. The results show that the four pedestrian loads give rather different numerical results regarding the amplitudes of the acceleration for each mode. In addition, a small change in the numerical parameters of the slab can give large differences in the numerical results. This shows that an accurate numerical modelling of a single pedestrian loading is not an easy task. The results show also that during transversal and diagonal walking paths, the vibrations due to the torsional mode of the slab can be higher than the ones due to the lowest bending mode.
Tài liệu tham khảo
Hegger J, Roggendorf T, Kerkeni N (2009) Shear capacity of prestressed hollow core slabs in slim floor constructions. Eng Struct 31:551–559
Girhammar UA, Pajari M (2008) Tests and analysis on shear strength of composite slabs of hollow core units and concrete topping. Constr Build Mater 22:1708–1722
Lam D, Elliott KS, Nethercot DA (2000) Parametric study on composite steel beams with precast concrete hollow core floor slabs. J Constr Steel Res 54:283–304
Faheem A, Ranzi G, Fiorito F (2016) A numerical study on the thermal performance of night ventilated hollow core slabs cast with micro-encapsulated PCM concrete. Energy Build 127:892–906
Aguado JV, Albero V, Espinos A (2016) A 3D finite element model for predicting the fire behavior of hollow-core slabs. Eng Struct 108:12–27
Venanzi I, Breccolotti M, D’Alessandro A, Materazzi AL (2014) Fire performance assessment of HPLWC hollow core slabs through full-scale furnace testing. Fire Saf J 69:12–22
Kakogiannis D, Pascualena F, Reymen B (2013) Blast performance of reinforced concrete hollow core slabs in combination with fire: Numerical and experimental assessment. Fire Saf J 57:69–82
Jendzelovsky N, Vrablova K (2015) Comparison of natural frequencies of hollow core slabs. Appl Mech Mater 769:225–228
Marcos LK, Carrazedo R (2014) Parametric study on the vibration sensitivity of hollow-core slabs floors. Proceedings of the 9th International Conference on Structural Dynamics, EURODYN
Johansson P (2009) Vibration of hollow core concrete elements induced by walking. Master thesis, Lunds Tekniska Högskola, Lunds Universitet
Liu F, Battini J, Pacoste C, Granberg A (2017) Experimental and numerical dynamic analyses of hollow core concrete floors. Structures 12:286–297
Liu F, Battini J, Pacoste C (2018) Finite shell element models for the dynamic analysis of hollow core concrete floor. Mag Concr Res
Sedlacek G, Heinemeyer C, Butz C, Völling B (2006) Generalisation of criteria for floor vibrations for industrial, office, residential and public building and gymnastic halls. European Communities, Luxembourg
Setra (2006) Footbridges-Assessment of vibrational behavior of footbridges under pedestrian loading. http://www.setra.equipement.gouv.fr. Accessed 2006
Chen J, Xu R, Zhang M (2014) Acceleration response spectrum for predicting floor vibration due to occupant walking. J Sound Vib 333:3564–3579
Pan T, ASCE M, You X, Lim CL (2008) Evaluation of floor vibration in a biotechnology laboratory caused by human walking. ASCE J Perform Constr Facil. https://doi.org/10.1061/(ASCE)0887-3828(2008)22:3(122)
ISO 2631-1, Mechanical vibration and shock-Evaluation of human exposure to whole-body vibration-Part 1: General requirements (1997), International Organization for Standardization, https://www.iso.org/standard/7612.html. Accessed 1997
ISO 10137, Bases for design of structures-Serviceability of buildings and walkways against vibrations (2007), International Organization for Standardization, https://www.iso.org/standard/37070.html. Accessed 2007