PERENCANAAN ULANG GEDUNG RUMAH SAKIT NASIONAL INSTITUT TEKNOLOGI MALANG MENGGUNAKAN STRUKTUR BAJA DENGAN METODE LRFD

The rapid development of scientific fields in the masses is now very influential in the application of the type of construction material of a building. At this time there are several new applications in determining the selection of types of construction materials, one of which is the use of steel materials. The use of composite steel material is rarely applied to high-rise buildings, while composite steel has advantages in strength and relatively faster processing time. The advantages gained from using composite steel structures are that the structure becomes more rigid, the service span becomes larger and the stability becomes better.
The LRFD method is one of the methods of structural planning with the principle of reducing the capacity possessed by a cross-section. In this final project, the 7-storey National Hospital Building of the National Institute of Technology Malang was replanned using a composite steel structure with the Load and Resistance Factor Design (LRFD) method. As supporters, several references are used such as planning standards SNI 1727:2020 concerning Minimum Loads for Building Planning and other Structures, SNI 1729:2020 concerning Building Specifications for Structural Steel Buildings, SNI 1726:2019 concerning Procedures for Planning Earthquake Resistance for Building and Non-Building Structures, SNI 7972:2020 concerning Prequalified Connections for Special and Medium Moment Steel Frames in Seismic Applications, SNI 7860:2020 concerning Seismic Provisions for Structural Steel Buildings, and ANSI/AISC 360-2016: Specification for Structural Steel Buildings.
From the planning results, the size for composite steel produces composite plate thickness t = 120 mm, floor deck type W-1000 base metal thickness 0.70 mm, with wire mesh reinforcement M7.5-100 production from PT. Union Metal WF steel profile on longitudinal beam 250x125x6x9 and transverse ie WF 350x175x7x11, longitudinal and transverse master beam ie WF 450x200x9x14. For columns, WF profiles are used 400x400x13x21 and Inverted-V bracing uses WF 200x200x8x12. The connection uses BSEP (Bolt Stiffened End Plate) and for the base plate uses dimensions of 700x700 mm with a number of arranges of 4 – ø32 mm and a length of 1200 mm.