Dynamic behaviour of long span cantilever steel-concrete composite floor

Vibration and deflection are two main parameters that always govern the constructability of long span cantilever slab. This paper present the dynamic behavior of a 12.5m long span cantilever steel-concrete composite floor of an actual new proposed construction project. STAAD PRO software was used to...

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Main Author:	Ahwang, Amisah
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/78478/1/AmisahAhwangMFKA2017.pdf
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spelling	my-utm-ep.784782018-08-26T11:56:28Z Dynamic behaviour of long span cantilever steel-concrete composite floor 2017-05 Ahwang, Amisah TA Engineering (General). Civil engineering (General) Vibration and deflection are two main parameters that always govern the constructability of long span cantilever slab. This paper present the dynamic behavior of a 12.5m long span cantilever steel-concrete composite floor of an actual new proposed construction project. STAAD PRO software was used to analyze the structure subjected to both static and the dynamic loading. From the preliminary analysis using static loading, it was found that the original proposed structural configuration does not pass the deflection limit and is not constructable due to requirement for too big steel section not readily available in market. Consequently, modification to shorten the cantilever length to 6m is introduced and finally makes the structure possible to be build using a ready size of steel beams that are available in Malaysian market. In the detail dynamic analysis, excitation of dynamic loadings similar to human activity at a few random locations is applied to produced various mode shape. Results from the dynamic analysis gives acceleration on adjacent panels. The acceleration vs time graph is then used to calculate the critical natural frequency of the adjacent panels. This value of natural frequency then used to determine the range of recommended peak acceleration using the graph introduced by AISC Design Guide No. 11. It is found that the natural frequencies of the adjacent floor are in the range of 4 – 7 Hz, which is considered a low frequency floors. With the combination of low acceleration and low natural frequencies, it makes the modified floor which the new length is 6m still not comfortable to be used. Therefore, recommendation to thicken the concrete slab is proposed to increase the natural frequency of the floor, so that a comfortable construction is obtained. 2017-05 Thesis http://eprints.utm.my/id/eprint/78478/ http://eprints.utm.my/id/eprint/78478/1/AmisahAhwangMFKA2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:108751 masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ahwang, Amisah Dynamic behaviour of long span cantilever steel-concrete composite floor
description	Vibration and deflection are two main parameters that always govern the constructability of long span cantilever slab. This paper present the dynamic behavior of a 12.5m long span cantilever steel-concrete composite floor of an actual new proposed construction project. STAAD PRO software was used to analyze the structure subjected to both static and the dynamic loading. From the preliminary analysis using static loading, it was found that the original proposed structural configuration does not pass the deflection limit and is not constructable due to requirement for too big steel section not readily available in market. Consequently, modification to shorten the cantilever length to 6m is introduced and finally makes the structure possible to be build using a ready size of steel beams that are available in Malaysian market. In the detail dynamic analysis, excitation of dynamic loadings similar to human activity at a few random locations is applied to produced various mode shape. Results from the dynamic analysis gives acceleration on adjacent panels. The acceleration vs time graph is then used to calculate the critical natural frequency of the adjacent panels. This value of natural frequency then used to determine the range of recommended peak acceleration using the graph introduced by AISC Design Guide No. 11. It is found that the natural frequencies of the adjacent floor are in the range of 4 – 7 Hz, which is considered a low frequency floors. With the combination of low acceleration and low natural frequencies, it makes the modified floor which the new length is 6m still not comfortable to be used. Therefore, recommendation to thicken the concrete slab is proposed to increase the natural frequency of the floor, so that a comfortable construction is obtained.
format	Thesis
qualification_level	Master's degree
author	Ahwang, Amisah
author_facet	Ahwang, Amisah
author_sort	Ahwang, Amisah
title	Dynamic behaviour of long span cantilever steel-concrete composite floor
title_short	Dynamic behaviour of long span cantilever steel-concrete composite floor
title_full	Dynamic behaviour of long span cantilever steel-concrete composite floor
title_fullStr	Dynamic behaviour of long span cantilever steel-concrete composite floor
title_full_unstemmed	Dynamic behaviour of long span cantilever steel-concrete composite floor
title_sort	dynamic behaviour of long span cantilever steel-concrete composite floor
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/78478/1/AmisahAhwangMFKA2017.pdf
_version_	1747817994522722304

Dynamic behaviour of long span cantilever steel-concrete composite floor

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