Ghazali, Norhaiza (2010) Development Of Terrain Height Multipliers And Roughness Lengths For Seberang Perai Region. Masters thesis, Universiti Sains Malaysia.
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Abstract
Malaysia telah membangunkan satu kod piawaian beban angin terhadap bangunan yg dikenali sebagai Kod Piawai Beban Angin MS 1553:2002. Kod ini telah di adaptasi dari kod piawaian angin Australia 1170.2 kerana Malaysia dan Australia mempunyai keadaan iklim yang hampir serupa. Dalam masa yang sama, kajian giat dijalankan bagi mengemaskini semua pekali dan pembolehubah berdasarkan keadaan iklim sebenar di Malaysia. Menara Telekomunikasi Seberang Jaya telah di pilih sebagai lokasi kajian yang mewakil kawasan Kategori 3 bagi daerah Seberang Perai. Lapan tahun data pada tiga aras ketinggian yang berbeza telah dikumpul bagi menjalankan kajian ini. Data di rekod menggunakan “Ultrasonic Wind Sensor” (UWS). Persamaan “Power Law” merupakan persamaan yang paling sesuai dengan profil angin di kawasan kajian dan ianya telah dibuktikan oleh Ramli (2005). Di dalam kajian ini, kaedah statistik dan metematik digunakan bagi mencari Pekali Dedahan dan Ketinggian, Mz,cat dan Jarak Kekasaran Permukaan, zo. Keputusan kajian mendapati bahawa nilai Mz,cat yang diperolehi adalah lebih kecil nilainya berbanding nilai yang sediada yang digunakan di dalam MS 1553:2002. Perbezaan sehingga 19% di perolehi dan ianya berlaku disebabkan Australia dan Malaysia mempunyai iklim yang agak berbeza. Perbezaan yang sama juga dapat dilihat secara konsisten pada hasil perbandingan diantara kod dan piawaian antarabangsa yang lain. Nilai zo yang diperolehi untuk semua kategori kawasan adalah di antara 0.03 m hingga 1.13 m dan nilai tersebut berada di dalam lingkungan nilai bg keseluruhan kod dan piawaian antarabangsa yang diguna pakai. ________________________________________________________________________________________________________________________ Malaysia has developed its own standard of practice in wind loading known as MS 1553:2002 Code of Practice on Wind Loading for Building Structure. During the development of this Malaysian Standard, reference was made to Australian Standard due to the similarity of wind climate between Malaysia and Australia. In the same time, researches have been carried out in order to update all parameters in MS 1553:2002 based on Malaysia wind climate. Seberang Jaya Telecommunication Tower was selected as the study area representing terrain Category 3: Suburban area for Seberang Perai region. An eight years period of data are recorded at three different levels by using the Ultrasonic Wind Sensor (UWS). Power Law profile is the best equation fit with the vertical wind speed profile at the study area as proven by Ramli (2005). In this study, Terrain Height Multiplier, Mz,cat, and Roughness Length, zo for all terrain categories in Seberang Perai region are defined by using statistical and mathematical method. From the results obtained, the proposed Mz,cat for all terrain categories are much lower than the current values in MS 1553:2002. The difference up to 19% obtained due to the fact that Australia and Malaysia have different wind climate. A reasonable good agreement and a consistent result for Mz,cat can be noted from the comparison of the proposed value to the other international codes and standards. The proposed zo for all terrain categories are in range from 0.03 m to 1.13 m which is still in the overall range for all codes and standards.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | full text available at http://irplus.eng.usm.my:8080/ir_plus/institutionalPublicationPublicView.action?institutionalItemId=1957 |
| Subjects: | T Technology T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Awam (School of Civil Engineering) > Thesis |
| Depositing User: | Mr Mohd Jasnizam Mohd Salleh |
| Date Deposited: | 06 Jun 2018 04:52 |
| Last Modified: | 06 Jun 2018 04:52 |
| URI: | http://eprints.usm.my/id/eprint/40700 |
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