Performance Of Cruciform Column Using Universal Beam Sections Under Axial Compression Load

Abstract

Tujuan utama penggunaan tiang adalah untuk mengagihkan beban dengan cara tindakan mampatan. Daya mampatan tiang bergantung kepada beberapa faktor. Antara yang paling penting ialah panjang efektif, luas keratan, kekuatan bahan, sambungan pada kedua-dua hujungnya dan juga rembatan pada paksi lenturannya. Kertas kerja ini membincangkan keupayaan mampatan tiang cruciform. Tiang cruciform juga dikenali sebagai tiang gabungan, terdiri daripada dua keratan rasuk semesta di mana satu keratan rasuk semesta dikerat di tengah keratan dan dikimpal pada satu keratan rasuk semesta lain. Jadual keupayaan mampatan telah dihasilkan untuk pelbagai jenis saiz tiang dengan panjang efektif yang berbeza. Semua pengiraan untuk jadual keupayaan mampatan adalah merujuk kepada BS 5950–1:2000. Daripada kajian ini, didapati bahawa kekuatan mampatan tiang bertambah dengan pertambahan jejari legaran. Kajian ini dapat menyimpulkan bahawa penggunaan tiang cruciform mengurangkan jumlah berat tiang sebanyak 35% apabila dibandingkan dengan tiang universal dan 60% apabila dibandingkan dengan rasuk universal. Kata kunci: Tiang cruciform, tiang gabungan, kekuatan mampatan, panjang efektif, rasuk universal The main function of a column is to transfer loads by means of compressive action. The response of the column to a nominally applied load depends upon a number of factors. The most important are its length and cross–sectional shape, the strength of material, the conditions of support provided at its ends and the method of restrained to its axis. This paper presents the performance of cruciform column under axial compression load. Cruciform column, which is also known as compound members, consists of two universal beams section where one universal beam section is cut into two at the mid section of the beam and welded to the other beam section. The compression capacity tables based on the code BS5950–1:200 are developed for columns with different sections and different effective lengths. The study shows that the compression resistance of the column increases as the radius of gyration of the section increases due to the formation of cruciform column. The study also concludes that the use of cruciform column contributes to the saving of the column steel weights up to 35% compared to UC sections and up to 60% as compared to UB sections. Key words: Cruciform column, compound member, compression resistance, effective length, universal beam