12 research outputs found
STUDI EKSPERIMENTAL SAMBUNGAN ELEMEN STRUKTUR BAJA RINGAN DENGAN ALAT SAMBUNG SEKRUP DAN BAUT
No full textABSTRAK
Perkembangan teknologi bahan konstruksi bangunan saat ini menunjukkan kecenderungan penggunaan material yang efisien sesuai dengan kebutuhan. Salah satunya adalah penggunaan material baja ringan sebagai elemen struktur dalam konstruksi bangunan. Dalam perakitan dan pemasangan profil baja ringan, sehingga terbentuknya desain struktur rangka baja ringan, perlu diperhatikan ketentuan pemilihan dan pemasangan alat sambung agar diperoleh sistem struktur yang stabil, kuat dan tidak merusak lapisan anti karat. Penelitian ini membahas hasil studi eksperimental sambungan pada elemen struktur baja ringan dengan menggunakan dua tinjauan alat sambung yaitu alat sambung sekrup dan baut.
Profil baja ringan yang digunakan dalam penelitian ini adalah profil berbentuk kanal dengan ukuran 75 x 35 mm dengan ketebalan 0,75 mm. Properties material diperoleh melalui uji tarik dengan mengacu kepada Annual Book of ASTM Standars 1991 Section 3. Kondisi sambungan diamati untuk 7-spesimen, dengan tinjauan alat sambung sekrup, 4-spesimen benda uji yang disambung pada kedua bagian sayap penampang kanal dengan konfigurasi sambungan satu baris dan 3-spesimen berikutnya disambung pada bagian badan penampang kanal dengan tinjauan pemakaian sekrup tunggal. Tinjauan yang sama pada kondisi sambungan baut dengan total spesimen sebanyak 6 benda uji, masing-masing dibagi sebanyak 3-spesimen dengan dua tinjauan penempatan konfigurasi alat sambung seperti halnya pada sambungan sekrup.
Dengan pembebanan statik monotonik menggunakan Universal Testing Machine, beban aksial tarik diberikan secara bertahap kepada spesimen sampai tercapai kondisi ultimate. Dari hasil pengujian terlihat bahwa kegagalan sambungan sekrup disebabkan oleh terjadinya kerusakan pada lubang sambungan, sehingga alat sambung sekrup berotasi pada bidang tegak lurus gaya tarik, pola kegagalan sambungan ini merujuk pada salah satu jenis kegagalan ‘tilting’. Pada sambungan baut kegagalan sambungan dari hasil pengujian, memberikan bentuk kegagalan geser pada baut (baut putus). Dua bentuk kegagalan sambungan tinjauan penggunaan alat sambung sekrup dan baut ini, merujuk seperti yang didefinisikan oleh Peraturan Baja Ringan AS/NZS 4600:2005 dan SNI Baja Canai Dingin 2013. Nilai beban ultimate kekuatan sambungan yang diperoleh dari hasil eksperimental menunjukkan kesesuaian dengan formula analitik yang ada pada peraturan baja ringan dengan rata-rata perbedaan hasil sebesar 11,62 % pada sambungan sekrup dan 7,38 % pada sambungan baut. Dari dua tinjauan alat sambung yang digunakan, kekuatan sambungan baut jauh lebih kuat dari kekuatan sambungan sekrup. Dengan diameter yang sama, kekuatan sambungan baut lebih kuat 68,63 % bila dibandingkan dengan kekuatan sambungan sekrup.
Kata kunci: baja ringan, sambungan, sekrup, baut, beban ultimat
Desain Ulang Struktur Bangunan Gedung Hotel Ibis Padang Dengan Tinjauan Fixed Base
No full textReinforced concrete structure is a structural forming material that is still widely used. Concrete structure has advantages in the ease of materials and also the workmanship. Reinforced concrete is also more effectively used for structures that have a less long span. Ibis Padang Hotel building planning uses reinforced concrete structures with reference to SNI 2847:2013 on Structural Concrete Requirements for Buildings and SNI 1726:2012 on Earthquake Resilience Planning Procedures for Building And Non-Building Structures. The burdens that occurred were reviewed in SNI 1727:2013 on The Indonesian Demolition Regulation for Buildings and Other Buildings. This planning uses a dual system of SRPMK and sliding walls in terms of earthquake anchoring. The concept of this plan is based on the ultimate design that occurs, where the ultimate value must be smaller than the cross-sectional strength of the structural components. Style calculation – style in using the ETABS 2013 program. In addition, there is also a calculation of the Cost Budget Plan. This writing aims to find out the comparison of the structural components of the Ibis Padang Hotel building using Base Isolator with the results of planning using Fixed Base. The beam component comparison obtained a smaller yield of 15.17% for casting volume and 23.64% for repeat weight. The comparison of column components obtained smaller results of 29.17% for casting volume and 24.32% for repeat weight. Comparison of plate components obtained a smaller result of 16.58% for the repeating weight. The comparison of pile cap components obtained a smaller result of 45.98% for casting volume and 2.54% of repeating weight
Bolt connection behaviour of the cold-formed steel joint
No full textThis paper presents an experimental study of bolt connection behaviour of the cold-formed steel joint. A 5-mm bolt was used to combine two channel sections. The size of channel section was 75 mm height, 35 mm width and 0.75 mm thickness. Tension test was conducted to obtain material characteristics of the channel section. Two type of connections were observed: Connection Type-1 that back-to-back channel sections were joined on their web directly, and Connection Type-2 that two channel sections were joined on their flanges through a same-size channel connector. The specimen was pulled by an increasing monotonically load. It was found that ultimate condition of the joint occurred when the bolt was split due to shear failure and the bolt was rotated because the hole size increased; these two failure modes are covered in the Indonesian and Australian/New Zealand cold-formed steel codes. The ultimate loads from the test were compared to analytical calculations using the formulae provided in the codes. The analytical calculation predicted the resistances conservatively within the range of 4 – 22 %
STUDI OPTIMALISASI KONFIGURASI STRUKTUR KUDA-KUDA ATAP BAJA RINGAN
No full textRoof truss of lightweight steel has been used for any types of construction. Functioned as the truss, this could makes variations of roof truss configuration which depended on construction necessity and performance on certain span. Then, this research analyzed the configurations for short span and intermediate span. The result will recommend roof truss configuration which used light weight steel. The analysis used software SAP 2000 v.19. The lightweight steel section is channel section of C 75.35.0,75 which is found on any store building. In general, the result of this analysis were tensile and compressive ratio which is obtained by comparison of internal force and section capacity. This calculation also referred to SNI 7971:2013 code. Then, tensile and compression ratio are obtained less than 0,9 for each configurations and spans. So, the structure are stable. However, Fink and Cremona configuration have considerable results which give the smallest tensile and compression ratio compared to another configurations for short span and intermediate span respectively. It can be concluded that Fink and Cremona were recommended for lightweight steel truss for short spans and intermediate spans. Lightweight steel section C 75.35.0,75 also can be used in this configuration
Studi Komparatif Pelaksanaan Tugas Besar Perencanaan Geometrik Jalan Secara Daring Dan Luring
No full textPerubahan metode pembelajaran selama masa Pandemi Covid 19 menuntut banyak penyesuaian yang berpengaruh pada hasil pembelajaran. Salah satunya yaitu pelaksanaan Tugas besar Perencanaan Gometrik Jalan yang dahulunya dilaksanakan secara luring, sekarang dilaksanakan secara daring. Dalam pengerjaan tugas besar secara daring diperoleh rerata pemahaman mahasiswa terhadap materi pembelajaran dan tugas besar Perencanaan Geometrik jalan yaitu 68,78%. Sedangkan persentase tingkat pemahaman mahasiswa dalam pengerjaan tugas besar secara luring yaitu 69,46%. Terdapat perbedaan tingkat pemahaman mahasiswa sebesar 0,68%. Perbedaan ini menunjukkan bahwa pembelajaran dan pengerjaan tugas besar Perencanaan Geometrik Jalan secara luring lebih mudah difahami dibandingkan pengerjaan secara daring
Perbandingan Konstruksi Perkerasan Lentur Dan Perkerasan Kaku Pada Jalan Gulang-Gulang Dusun Koto Kota Sawah Lunto Sta 0+000 – 0+500 Km
No full textThe results of the flexible pavement analysis on Jalan Gulang-Gulang Dusun Koto, Sawahlunto City are based on Component Analysis Method SKBI-2.3.26.1987 are Surface Course (Laston MS 744) 6 cm thick, Base Course (Batu Broken class A) 20 cm thick, Sub base Course (Sirtu Class A) 25 cm thick, while the rigid pavement "AASHTO 1993 method" is a concrete pavement with a thickness of 30 cm and a thin concrete foundation layer (LC) with a thickness of 10 cm. The analysis uses continuous concrete pavement with reinforcement with a plate thickness of 30 cm using shoulders and using D10-20 cm reinforcement for longitudinal and transverse directions. The dowel is installed with D-36 reinforcement with a length of 45 cm, a distance of 30 cm, while the tie bar is installed with D-16 BJTU-24 threaded steel reinforcement with a length of 30 cm. while the tie bar is installed with D-16 BJTU-24 threaded steel reinforcement with a length of 700 mm and a distance of 75 cm. The cost of rigid pavement construction is Rp. 3,039,054,000, - with skinny concrete (LC) specifications of K-175 kg/cm2 and cement concrete layer of K-250 kg/cm2, flexible pavement is Rp.2,910,136,000. shows that flexible pavement can save costs of Rp.128,918,000. With a percentage of 4.24% of the cost of rigid pavement construction. From the results of the comparison of the cost of flexible pavement construction which is cheaper and saves cost
Perencanaan Ulang Pelebaran Jalan Ruas Tapan- Batas Bengkulu Sta 224+400 – 225+300
No full textRoad infrastructure has a very important role in human life. Roads are the most important infrastructure of land transportation, with access roads from one area to another becoming easier. The development of roads from time to time is also increasing rapidly. The development of land transportation and the development of human activities was also followed by the repair, widening, and opening of new roads as happened in Nagari Tapan, where this nagari is one of the connecting accesses for the Province of West Sumatra and Bengkulu Province. This re-planning uses the 2013 Bina Marga regulation and the 1997 Intercity Road Geometric Planning Procedure (TPGJAK). The redesign process starts with data collection, data analysis, road geometric calculations, pavement thickness and budget plan (RAB). From the results of the calculation of the Geometric Planning of the Bengkulu-Boundary Tapan Road, it can be concluded that the Bengkulu-Boundary Tapan Road is local, with a 2-lane 2-way road type, 2×3.5 meters wide, flat terrain class and a design speed of 40 km/hour. Planning Horizontal alignment is planned for one type of bend in the form of 2 (two) Spiral Circle Spiral bends and vertical alignment is planned for 14 PV Points of Vertical. Based on the results of Flexible Pavement with the 2013 Highways Analysis, the overall pavement thickness is 42 cm, consisting of 4 cm AC-WC thickness, 6 cm AC-BC thickness, 14.5 cm AC-Base thickness, and 17.5 cm sub-base thickness. Flexible Pavement Construction Cost Rp. 5,104,375,000,- (five billion one hundred four million three hundred and seventy five thousand rupiah)
Bolt connection behaviour of the cold-formed steel joint
No full textThis paper presents an experimental study of bolt connection behaviour of the cold-formed steel joint. A 5-mm bolt was used to combine two channel sections. The size of channel section was 75 mm height, 35 mm width and 0.75 mm thickness. Tension test was conducted to obtain material characteristics of the channel section. Two type of connections were observed: Connection Type-1 that back-to-back channel sections were joined on their web directly, and Connection Type-2 that two channel sections were joined on their flanges through a same-size channel connector. The specimen was pulled by an increasing monotonically load. It was found that ultimate condition of the joint occurred when the bolt was split due to shear failure and the bolt was rotated because the hole size increased; these two failure modes are covered in the Indonesian and Australian/New Zealand cold-formed steel codes. The ultimate loads from the test were compared to analytical calculations using the formulae provided in the codes. The analytical calculation predicted the resistances conservatively within the range of 4 – 22 %.</jats:p
Emergency stop lane design on national road in West Sumatra (case study: Panorama 1 Sitinjau Lauik)
No full textWest Sumatra Province has geographical conditions consisting of lowlands and highlands. These geographical conditions certainly affect the geometric conditions of the road, especially on the Panorama 1 Sitinjau Lauik National Road Section. One of the factors that cause accidents is a vehicle that has failed brakes. This study aims to calculate the length of the emergency stop lane; plan the structure of the building; and plan a modeling design. The results of the Emergency Stop Route Design research showed that the overall dimensions were 240 m. Preliminary design results are as follows: Beam (600 mm width and 1100 mm height), Amount of flexural reinforcement: Compression reinforcement 8 D – 25 mm; Tensile reinforcement 4 D – 25 mm; Amount of shear reinforcement: Area of support 2Ø13-100 mm, Area of field 2Ø13-150 mm. Cross beam width 300 mm and height 600 mm. Amount of flexural reinforcement: compression reinforcement 3 D 16 mm; Tensile reinforcement 3 D 16 mm. Number of shear reinforcement: Support area 2Ø13-100 mm and field area 2Ø13-150 mm. For longitudinal reinforcement, the diameter is ø10 – 200 mm, the tie reinforcement has a diameter of ø10 – 200 mm and the vertical reinforcement has a diameter of ø16 – 150 mm
Perencanaan Trotoar Di Depan Kampus Universitas Dharma Andalas Kota Padang
No full textTrotoar merupakan tempat untuk pejalan kaki yang berada pada kawasan milik jalan diberi lapisan permukaan lebih tinggi dibandingkan dengan permukaan jalan yang bersebelahan dengan jalan, pejalan kaki sangat membutuhkan tempat untuk berjalan yang dapat memberikan keselamatan dan keamanan bagi pejalan kaki. Perencanaan Trotoar didepan Kampus Universitas Dharma Andalas bertujuan untuk mengetahui tingkat pelayanan pejalan kaki yang mengacu pada HCM 2000, dan perencanaan trotoar berdasarkan arus jam puncak pejalan kaki mengacu pada Pedoman perencanaan jalur pejalan kaki pada jalan umum 1999 Bina Marga. Hasil tingkat pelayanan segmen 1 berdasarkan lebar diperoleh arus puncak pejalan kaki terjadi pada jam 13.05-13.10 jumlah arus pejalan kaki sebanyak 28 orang dengan nilai tingkat pelayanan B, evaluasi berdasarkan Volume nilai tingkat pelayanan A, evaluasi berdasarkan kecepatan nilai tingkat pelayanan E. Hasil tingkat pelayanan segmen 2 berdasarkan lebar diperoleh arus puncak pejalan kaki terjadi pada jam 07.05-07.10 jumlah arus pejalan kaki sebanyak 29 orang dengan nilai tingkat pelayanan D, evaluasi berdasarkan Volume nilai tingkat pelayanan A, evaluasi berdasarkan kecepatan nilai tingkat pelayanan E. Hasil perencanaan trotoar segmen 1 berdasarkan arus jam pejalan kaki sebanyak 28 orang diperoleh lebar trotoar 2,35 hasil perencanaan trotoar segmen 2 sebanyak 29 orang diperoleh lebar trotoar 2,35 m. Harga keseluruhan pembangunan trotoar di depan kampus Universitas Dharma Andalas sebesar Rp 255,338,000,-
