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An experimental study of natural frequency of damaged cable net supported facade panel

An experimental study of natural frequency of damaged cable net supported facade panel / Nurul Syazwani Mohamad Ehsan
Jejaring kabel yang disokong oleh sistem fasad adalah struktur moden yang telah digunakan secara meluas dan mempunyai banyak kelebihan seperti nilai estetika yang menarik, mudah dibina, penggunaan cahaya yang efisien dan boleh menjimatkan tenaga. Ia biasanya digunakan di terminal lapangan terbang, lobi hotel, dan pusat perdagangan. Kajian ini telah dijalankan secara eksperimen. Fokus utama kajian ini adalah untuk melihat frekuensi semulajadi struktur jejaring kabel yang rosak. Tiga model telah dipertimbangkan dalam kajian ini. Ketiga-tiga model tersebut adalah jejaring kabel, jejaring kabel dengan panel perspek dan jejaring kabel dengan panel perspek dan sealant silikon. Selain itu, kajian ini juga dijalankan untuk melihat sumbangan dan kesan panel perspek dan sealant silikon untuk struktur jejaring kabel. Dalam kajian ini, frekuensi semulajadi jejaring kabel disokong oleh panel fasad dikaji melalui eksperimen dan telah dianalisis dengan menggunakan perisian MATLAB 2015a. Kabel yang rosak di dalam sistem jejaring kabel telah menyebabkan frekuensi semulajadi struktur jejaring kabel berkurang dalam julat 1.40% kepada 2.06% tetapi dengan kehadiran panel perspek dan sealant silikon, frekuensi telah dapat dikekalkan sekitar 70Hz. Walaupun terdapat kerosakan pada kabel, panel perspek menunjukkan kesan yang besar kepada frekuensi semulajadi struktur jejaring kabel. Frekuensi semulajadi keseluruhan struktur telah meningkat dalam linkungan 3.77% kepada 4.96%. Kabel dengan 100% nilai pengurangan dalam daya pra tekanan mewakili kabel yang rosak dalam kajian ini. Sementara itu, bagi kes pengurangan daya pra tekanan, 30% pengurangan nilai daya pra tekanan daripada nilai daya pra tekanan sebenar menunjukkan penurunan frekuensi dalam linkungan 2.73% kepada 4.07% dan 60% pengurangan nilai daya pra tekanan daripada daya pra tekanan sebenar menunjukkan penurunan frekuensi dalam lingkungan 1.06% kepada 1.77%. Frekuensi semulajadi tertinggi dicatatkan telah dihasilkan oleh struktur jejaring kabel dengan panel perspek dan sealant silikon dengan 77.25hz. _______________________________________________________________________________________________________ Cable net supported facade system that has been widely used is a modern structure and has many advantages, such as pleasing aesthetics, easy constructability, efficient use of natural lighting and energy savings. It is commonly used in airport terminals, hotel lobbies, and trade centre. This research was conduct experimentally. The main focus for this research is to observe the natural frequency of damaged cable net structure. Three models were considered in this research. There were cable net only, cable net with perspex panels and cable net with perspex panel and silicone sealant. Besides that, this research was also carried out to observe the contribution and effect of perspex panel and silicone sealant to the cable net structure. In this research, the natural frequency of cable net supported facade panel was investigated via experiments and has been analyzed by using MATLAB 2015a software. The damaged cable in cable net system had caused the decreased in frequency of the cable net structure in the range of 1.40% to 2.06% but with the present of perspex panel and silicone sealant, the frequency was maintained around 70Hz. Although there was damaged in the cable, the perspex panels showed a significant effect to the natural frequency of the cable net structure. The frequency of the whole structure had increased in the range of 3.77% to 4.96%. The cable with 100% losses value in pre stress force represents the damaged cable in this study. Meanwhile, for the case of pre stress loss, the 30% losses value of the actual pre stress force showed a decrement of frequency in the range of 2.73 % to 4.07% and 60% losses value of actual pre stress showed a decrement of frequency in the range of 1.06% to 1.77%. The highest natural frequency recorded is produced by the cable net structure with perspex panel and silicone sealant with 77.25Hz.
Contributor(s):
Nurul Syazwani Mohamad Ehsan - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003106748
Accession Number : 875006872
Language:
English
Subject Keywords:
Cable net; airport terminals; perspex panel
First presented to the public:
6/1/2017
Original Publication Date:
3/21/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 73
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-21 12:40:57.502
Date Last Updated
2020-05-27 09:39:25.527
Submitter:
Mohd Jasnizam Mohd Salleh

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