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Experimental study on effect of end plate thickness on moment capacity and failure mode of rc square pile joints

Experimental study on effect of end plate thickness on moment capacity and failure mode of rc square pile joints / Chan Han Pin
Secara amnya, panjang cerucuk segiempat pratuang bertetulang adalah dihadkan dalam 12 meter disebabkan oleh kekangan penghantaran dan pengurusan. Sambungan cerucuk diperlukan untuk penyambungan cerucuk pada keadaan di mana panjang ceruruk melebihi 12 meter diperlukan. Kekuatan sambungan cerucuk tidak harus kurang daripada seksyen cerucuk yang disambungkan dalam semua konteks. Komponen cerucuk segiempat pratuang bertetulang adalah terdiri daripada plat hujung cerucuk, bar pertengahan, ‘anchor bar’, dan kambi keluli lembut. Objektif untuk projek tahun akhir ini ialah untuk menjalankan penyiasatan lanjutan melalui eksperimen tentang kesan ketebalan plat hujung cerucuk pada kapasiti sambungan cerucuk pada kedua-dua tahap had perkhidmatan dan tahap had muktamad serta ragam kegagalan sambungan cerucuk segiempat pratuang bertetulang pada tahap had muktamad. Keputusan yang diperolehi telah menunjukkan bahawa pertambahan ketebalan plat hujung cerucuk akan menjadikan sambungan cerucuk mempunyai keupayaan momen yang lebih tinggi seperti yang berikut: 4.624 kN m (4 mm plat hujung), 7.208 kN m (6 mm plat hujung) dan 10.374 kN m (8 mm plat hujung). Ragam kegagalan adalah berbeza untuk spesimen yang berlainan ketebalan plat hujung cerucuk. Ragam kegagalan untuk ketebalan plat hujung cerucuk 4 mm adalah disebabkan oleh lenturan tempatan yang keterlaluan pada sambungan kimpalan antara ‘anchor bar’ dengan plat hujung. Untuk ketebalan plat hujung cerucuk 6 mm pula, ragam kagagalannya adalah secara amnya disebabkan oleh kegagalan tertarik keluar dari plat hujung. Sementara itu, ragam kegagalan untuk ketebalan plat hujung cerucuk 8 mm boleh dikelaskan sebagai kegagalan keratan pada konkrit bertulang. _______________________________________________________________________________________________________ Precast reinforced concrete pile length is generally limited to 12 meters due to transportation and handling constraints. Pile joints are needed to lengthen the pile for certain circumstances where pile length exceeding 12 meters is needed. The joints strength should not be less than in all respects to that of the pile section joined. The components of RC square pile joint consist of pile end plate, centering bar, anchor bar and mild steel skirting. The objective of this final year project is to further investigate by means of experiment on the effect of end plate thickness on capacity at both serviceability and ultimate limit states and failure mode of RC pile joints at ultimate limit state. The result obtained shows that increasing of end plate thickness will lead to the higher moment capacity of the pile joints as follows: 4.624 kN m (4 mm end plate), 7.208 kN m (6 mm end plate) and 10.374 kN m (8 mm end plate). The failure modes of specimens differ for different end plate thickness. For the case of 4 mm end plate thickness, specimen failure mode is caused by the local excessive bending at welded connection between anchor bar and the end plate. For 6 mm end plate thickness specimen, the failure mode is mainly due to pull-out failure. Meanwhile, the failure mode for the 8 mm case is classified as failure of RC section.
Contributor(s):
Chan Han Pin - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875001968
Language:
English
Subject Keywords:
concrete; pile; joints
First presented to the public:
4/1/2005
Original Publication Date:
9/17/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 108
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-09-17 17:09:40.896
Submitter:
Mohd Jasnizam Mohd Salleh

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