Electronic Theses and Dissertation

Batang tekan telah digunakan secara luas pada berbagai tipe konstruksi. Salah satu
penampang batang tekan pada konstruksi bangunan adalah profil siku. Penggunaan
profil siku sebagai batang tekan banyak diterapkan pada kolom, struktur tower
transmisi dan truss yang umumnya menggunakan sambungan baut sebagai tumpuan
dikedua ujung. Seiring dengan penambahan beban pada bangunan, seperti
peninggian bangunan dibutuhkan perkuatan salah satunya dengan penambahan
penampang. Sejauh ini, belum ada kajian yang komperensif untuk melihat pengaruh
penghubung terhadap kekuatan tekan dari komponen berpenampang ganda.
Penelitian ini akan mengkaji perilaku penampang profil baja siku ganda terhadap
beban aksial tekan. Pada penelitian digunakan sambungan baut pada kedua ujung
tumpuan. Benda uji siku ganda dengan panjang 1500 mm, divariasikan terhadap
konfigurasi penghubung (lacing tunggal dan ganda) dan jarak konektor (140, 170,
210 mm). Di laboratorium, pembebanan tekan diberikan secara bertahap hingga
benda uji gagal, serta dilakukan perekaman data beban dan perpindahan. Dari
pengujian, di dapatkan hasil beban tekan dan nilai deformasi (perpindahan)
terhadap batang tekan. Hasil penelitian menunjukkan bahwa adanya pengaruh jarak
konektor terhadap penambahan kekangan dan variasi konfigurasi penghubung
terhadap nilai beban tekan dan deformasi yang terjadi. Dari hasil penelitian
didapatkan, nilai kuat tekan pada lacing ganda lebih besar dibandingkan lacing
tunggal. Pada penelitian ini dilakukan kajian teoritis terhadap kekuatan nominal
batang tekan. Dari hasil perhitungan teoritis, didapatkan pada lacing tunggal
kekuatan nominal lebih besar dibandingkan kekuatan di laboratorium sebesar 5%
pada ketiga benda uji, sehingga desain tersebut tidak aman digunakan karena nilai
yang dihasilkan overestimate dan perlu dilakukan koreksi parameter pada
perhitungan teoritis kekuatan nominal. Sedangkan untuk nilai deformasi,
didapatkan hasil pada lacing tunggal lebih besar dibandingkan lacing ganda. Pada
penelitian ini, jenis tekuk yang di dapatkan secara umum adalah tekuk lentur.

Compression members have been used extensively in various types of construction. One of the cross-sections of compression members in building construction is the steel angle. The use of steel angle as compression members is widely applied to columns, transmission tower structures and trusses which generally use bolted connection as a support at both ends. Along with the additional load on the building, such as increasing building height, reinforcement is needed, one of which is by adding a cross section. So far, there has been no comprehensive study to see the effect of connectors on the compressive strength of double-section components. This study will examine the behavior of double steel angle profiles against compressive axial loads. In the study, bolted connections are used at both ends of the support. Double steel angles specimen with a length of 1500 mm, were varied with respect to connector configuration (single and double lacing) and connector spacing (140, 170, 210 mm). In the laboratory, compressive loading is applied gradually until the specimen fails, and load and displacement data are recorded. From the test, the results of the compressive load and deformation (displacement) values of the compression members were obtained. The results show that there is an effect of connector distance on the addition of confinement and variations in connector configuration on the value of compressive load and deformation that occurs. From the results obtained, the compressive strength value of double lacing is greater than single lacing. In this research, an theoretical study was conducted on the nominal strength of compression members. From the results of theoritical calculation, it was found that the nominal strength of a single lacing is greater than the strength in the laboratory of 5% on the three test objects, so the design is not safe to use because the obtained value is overestimated and parameter corrections need to be made to the nominal strength theoretical calculation. As for the deformation value, the results obtained for single lacing are greater than double lacing. In this study, the type of buckling obtained in general is flexural buckling.