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A study on structural behaviour of plastic chair/wheel concrete spacer/Tan Wei Shung

A study on structural behaviour of plastic chairwheel concrete spacer_Tan Wei Shung _A9_2011_NI
Tujuan kajian ini adalah untuk menentukan kapasiti mampatan peruang yang digunakan dalam industri pembinaan secara eksperimen, dan mempelajari pengedaran beban dalam struktur peruang melalui analisis pengkomputeran. Sampel kerusi plastik dan roda peruang diperolehi dari kilang pembuatan tempatan peruang plastik. Sampel diuji untuk mendapatkan lengkungan graf beban perpindahan dengan menggunakan Universal Testing Machine (UTM). Perbandingan antara peruang roda dan kerusi telah dijalankan. Beban mampat maksima untuk peruang dengan kedalaman pelbagai penutup diuji untuk peruang kerusi. Bahan dari plastik peruang yang diperolehi dari kilang pembuatan mempunyai perkadaran campuran polypropylene (PP) dan bahan kitar semula. Pengkomputeran analisis dilakukan dengan menggunakan perisian analisis unsur terhingga iaitu LUSAS. Sebuah analisis elemen terhingga dengan elemen 3D dilakukan untuk mengkaji agihan beban peruang. Keputusan ujian makmal menunjukkan bahawa kapasiti maksima dan pengahihan peruang kerusi plastik lebih tinggi daripada peruang roda plastik. Peruang plastik roda penutup 35 mm boleh menyokong jumlah maksima 0.4537 kN. Bahagian yang paling lemah dalam peruang plastik merupakan kaki roda luarnya. Peruang plastik kerusi penutup 50 mm, 40 mm dan 30 mm, dapat menyokong jumlah maksima tekanan 1.185 kN, 1.148 kN, kN 1.850. Peruang kerusi plastik juga boleh menyokong sehingga empat kali kapasiti beban tekan maksima berbanding dengan kerusi roda peruang plastik untuk ketebalan yang sama. Keputusan analisis pengkomputeran pada kerusi peruang menunjukkan bahawa perilaku bisa yang disimulasikan amat memuaskan. Namun, kapasiti mampatan menunjukkan perbezaan yang ketara kerana tidak tersedianya data mampatan-tegasan bahan asli yang digunakan untuk peruang. Kedua-dua pemerhatian uji makmal dan analisis pengkomputeran menunjukkan bahawa bahagian kaki tengah peruang kerusi memainkan peranan penting dalam pengagihan beban yang menyebabkan kegagalan di penutup akibat dari perpindahan mampatan. ___________________________________________________________________________________ The purpose for this study was to determine the compression capacity of spacers used in the construction industry by means of experimental work, and to study load distribution within the structural of spacer by means of computational analysis. Plastic chair and wheel spacer samples were obtained from a local manufacturer of plastic spacers. Samples were tested to obtain a load displacement curve using the Universal Testing Machine (UTM). Comparison between wheel spacer and chair spacer was made. The maximum compressive load for spacers with various cover depths were tested for chair spacer. The material of the plastic spacers obtained from the manufacture had mix proportions of polypropylene (PP) and recyclable material. Computational analysis was carried out using finite element analysis software LUSAS. A finite element analysis using 3D elements was carried out to study the load distribution. Experimental results show that the maximum capacity and displacement of plastic chair spacer is higher than that of plastic wheel spacer. Current most used and available plastic wheel spacer of cover 35 mm can support an average maximum loading of 0.4537 kN. The weakest link in a plastic wheel spacer is its outer legs. Current most used and available plastic chair spacer of cover 50 mm, 40 mm and 30 mm, can support an average maximum loading of 1.185 kN, 1.148 kN, 1.850 kN respectively. Plastic chair spacers could take up to four times the maximum compressive load capacity compared to plastic wheel chair spacer for the same cover. Results of computational analysis on a chair spacer show that the trend of behaviour could be simulated satisfactorily. However, the compression capacity showed significant difference in magnitude due to unavailability of stressstrain data of the actual material used for the spacer. Both laboratory test observations and computational analysis shows that the center column of the chair spacer plays a significant role in the load distribution which leads to its loss in cover as a result of compression displacement.
Contributor(s):
Tan Wei Shung - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
spacer ; plastic chair ; wheel spacer
First presented to the public:
5/1/2011
Original Publication Date:
3/13/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 75
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-03-13 10:59:35.223
Date Last Updated
2020-11-19 21:59:05.854
Submitter:
Nor Hayati Ismail

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A study on structural behaviour of plastic chair/wheel concrete spacer/Tan Wei Shung1 2020-03-13 10:59:35.223