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"Torch brazing adalah salah satu metode brazing berdasarkan sumber panas. Metode ini dalam proses penyambungan logam tergolong liquid-solid state thermochemical dan pada umumnya digunakan dalam penyambungan pipa. Proses brazing ini memanaskan logam pengisi hingga mencapai titik leleh tanpa melampaui titik leleh logam dasar yang akan disambung. Logam pengisi akan memberikan sambungan yang kuat pada logam dasar setelah mengalami pendinginan. Pemberian tekanan dan panjang lap joint pada proses brazing akan berpengaruh pada kualitas sambungan.Pada penelitian ini akan diketahui pengaruh tekanan dan panjang lap joint terhadap kekuatan sambungan pipa baja rendah karbon bundy dan tembaga C1100T. Konfigurasi yang paling optimal pada panjang lap joint akan diketahui dari hasil beban tarik. Beban tarik dan jarak antar sambungan adalah faktor yang mempengaruhi kekuatan dari sambungan brazing. Hasil penelitian menunjukkan tekanan memiliki pengaruh lebih besar daripada panjaang lap joint terhadap logam tak sejenis menggunakan torch brazing.

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Torch brazing is one method of brazing based on the heat source. This method as the process of joining metals in classified as liquid-solid state thermochemical and generally used in the joining pipe. This process heats the brazing filler metal until it reaches the melting point without exceeding the melting point of the base metals to be joined. The filler metal will give strong joining to the base metal after cooling. Giving pressure and length of lap joint in the brazing process will affect the quality of the joining.

This research will investigate the effect of pressure and length of lap joint to joint strength of low carbon steel bundy tube and C1100T copper. The most optimal configuration between length of lap joint will be known from the result of shear load, which are the factors that affect joint strength of brazing. The result shows that the pressure have effect bigger than length of lap joint for dissimilar metal using torch brazing.

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"ABSTRAKSambungan balok kolom merupakan bagian konstruksi gedung yang menerimabeban besar baik berupa momen, geser maupun aksial yang didesain berdasarkanperaturan yang berlaku pada masanya. Di Indonesia diberlakukan PBI 1971 dan SKSNI T-15-1991-03 di tahun 1971 dan 1991. Di sisi lain sambungan balok kolomberprilaku semi kaku ditandai dengan penurunan kekakuan dan terbentuknya rotasisetelah terjadinya retak pada balok. Studi dilakukan untuk melihat kecenderunganperbedaan kekuatan, kekakuan dan daktilitas serta karakteristik kesemikakuansambungan balok kolom yang didesain dengan kedua peraturan tersebut. Dalam studidilakukan eksperimental benda uji dan analisi hasil eksperimen serta dilakukanpemodelan dan analisa numerik dengan Drain-2DX. Dari hasil analisa diperoleh desaindengan SK SNI T-15-1991-03 memiliki nilai 30% lebih besar untuk aspek kekuatan dankekakuan dibandingkan desain dengan PBI 1971 dan memiliki nilai daktilitas lebih dari5 untuk keduanya. Sementara itu untuk aspek kesemikakuan sambungan, nilai rotasi,momen dan kekakuan rotasi dengan desain SK SNI T-15-1991-03 memiliki nilaicenderung lebih besar dibandingakan dengan desain PBI 1971. Dari hasil analisis baikeksperimental maupun numerik terlihat bahwa nilai kekuatan, kekakuan, daktilitas dankesemikakuan desain dengan SK SNI-T-15-1991-03 lebih besar dibandingkan dengandesain PBI 1991.

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ABSTRACTBeam-column joint is part of the building which get large load like moment,shear or axial that design based code at the time. In Indonesia, PBI 1971 and SK SNI T15-1991-03applied on 1971 and 1991. In other hand, beam-column joint behavesemirigid indicated by degradation of stiffness and formed of rotation after crack at thebeam. This study made to check trend of difference from strength, stiffnes and ductilitythan characteristics of semirigidity beam-column joint designed by both of code. In thisstudy made experiment on specimen and analysis of its results and than made amodelling and numerik analysis use Drain-2DX. Results of the analysis show thatdesign use SK SNI T-15-1991-03 more than 30% design use PBI 1971 for strength andstiffness than have ductility more than 5 for both. Morever, for semirigidity of joint,rotation, moment and stiffness of rotation designed by SK SNI T-15-1991-03 have atendency more than PBI 1971. From experimental and numerical show that strength,stiffnes, ductility and Semirigidity designed by SNI-T-15-1991-03 more than designedby PBI 1991."

"Torch brazing is one method of brazing based on using a heat source for joining metals. This method is classified as a liquid-solid state thermochemical process and is generally used in joining pipes. This process heats the brazing filler metal until it reaches the melting point without exceeding the melting point of the base metals to be joined. After cooling, the filler metal grants a strong joining capacity to the base metal. Depending on the amount of pressure and the length of lap joint in the brazing process the quality of the joint will be affected. This research will investigate the effect of pressure and the length of the lap joint on the material strength properties of BJ DD2 steel and C12000 copper. An optimal configuration between pressure and the length of lap joint will be determined from the result of shear load and joint clearance, which are the factors that affect joint strength and the process of brazing. The greater the shear load and the smaller the joint clearance, the higher the joint strength will be. The result shows that the pressure has a larger effect than the length of the lap joint for dissimilar metal joining using torch brazing."