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Liu, Fangzhou
Publications (3 of 3) Show all publications
Liu, F., Battini, J.-M. & Pacoste, C. (2019). Experimental and numerical analyses of single pedestrian walking on a hollow core concrete floor. International Journal of Civil Engineering, 17(7A), 1201-1209
Open this publication in new window or tab >>Experimental and numerical analyses of single pedestrian walking on a hollow core concrete floor
2019 (English)In: International Journal of Civil Engineering, ISSN 1735-0522, Vol. 17, no 7A, p. 1201-1209Article in journal (Refereed) Published
Abstract [en]

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 10mx1.2m 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.

Place, publisher, year, edition, pages
Springer, 2019
Keywords
Hollow core concrete slab, Experimental tests, Finite element model, Hammer-impact load, Single pedestrian walking
National Category
Building Technologies
Identifiers
urn:nbn:se:kth:diva-250255 (URN)10.1007/s40999-018-0355-3 (DOI)000470334300018 ()2-s2.0-85066794272 (Scopus ID)
Note

QC 20190522

Available from: 2019-04-26 Created: 2019-04-26 Last updated: 2019-06-26Bibliographically approved
Liu, F., Battini, J.-M. & Pacoste, C. (2018). Vibrations of a hollow core concrete floor induced by hammer-impact load and single pedestrian walking. In: 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. Paper presented at 25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018, 8 July 2018 through 12 July 2018 (pp. 4632-4639). International Institute of Acoustics and Vibration, IIAV
Open this publication in new window or tab >>Vibrations of a hollow core concrete floor induced by hammer-impact load and single pedestrian walking
2018 (English)In: 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling, International Institute of Acoustics and Vibration, IIAV , 2018, p. 4632-4639Conference paper, Published paper (Refereed)
Abstract [en]

Precast and prestressed hollow core concrete slabs, that combine low self-weight and high strength, are often used for long span floors. However, this implies that the slabs are also confronted with the issue of human induced floor vibration serviceability. In this paper, experimental results from both hammer-impact and walking tests of a slab consisting of 6 hollow core concrete elements and of dimension 10 m × 1.2 m are presented. Comparisons with results Finite element results are performed. Three different walking paths and four numerical models taken from the literature for the single pedestrian load are considered. The results show that with 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. They show also that the four pedestrian loads give rather different numerical results.

Place, publisher, year, edition, pages
International Institute of Acoustics and Vibration, IIAV, 2018
Keywords
Experiments, FE models, Simulation, Vibration
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-241885 (URN)2-s2.0-85058807610 (Scopus ID)9781510868458 (ISBN)
Conference
25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018, 8 July 2018 through 12 July 2018
Note

QC 20190125

Available from: 2019-01-25 Created: 2019-01-25 Last updated: 2019-01-25Bibliographically approved
Liu, F., Battini, J.-M., Pacoste, C. & Granberg, A. (2017). Experimental and Numerical Dynamic Analyses of Hollow Core Concrete Floors. Structures, 12, 286-297
Open this publication in new window or tab >>Experimental and Numerical Dynamic Analyses of Hollow Core Concrete Floors
2017 (English)In: Structures, ISSN 2352-0124, Vol. 12, p. 286-297Article in journal (Refereed) Published
Abstract [en]

Due to their low self-weight and high strength, precast and prestressed hollow core concrete slabs are widely used in construction. However, the combination of low self-weight and long span implies that the slabs are sensitive to vibrations induced by human activities. In this work, experimental tests and numerical analyses are performed in order to understand the dynamic behaviour of hollow core concrete floors. For the experiments, a test floor of dimension 10 m × 7.2 m and consisting of 6 hollow core elements was built. Very good agreements between experimental and numerical results have been obtained. Comprehensive numerical parametric analyses have been performed in order to determine the optimal value of the material parameters.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Dynamic analyses, Experimental tests, Finite element model, Hollow core concrete slabs, Model calibration
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-218309 (URN)10.1016/j.istruc.2017.10.001 (DOI)000418536400023 ()2-s2.0-85033669374 (Scopus ID)
Note

QC 20171127

Available from: 2017-11-27 Created: 2017-11-27 Last updated: 2018-03-23Bibliographically approved
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