Irwinna, Julieta Chrisni (2022) Pengaruh Penempatan dan Luasan Void Pada Bangunan Dengan First Soft Story Terhadap Periode Getaran, Rasio Partisipasi Massa, Gaya Geser Dasar dan Simpangan Antar Lantai Dengan Analisis Gempa Respon Sprektrum Berdasarkan SNI 1726-2019. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

Many tall buildings are architecturally asymmetrical in shape and high aesthetic value. Multi-store buildings that were originally simple in shape now have irregularities with many holes / voids on the floor and columns that are higher than the columns above them resulting in a first soft story mechanism. The placement and area of voids can make the structure asymmetrical and affect the performance of the structure so that an analysis of the placement and extent of voids is carried out on earthquake-resistant building structures.
The structure under review is a 10-story building with a first soft story and is given a varied area and void position. There are 4 variations of structure modeling. The structures modeled are Control Plan Model (MDK), Void Plan Model H (MDVH), Void Plan Model L (MDVL), Void Plan Model U (MDVU). Structural modeling is carried out in 3D with the help of the SAP2000 program. Earthquake force analysis using dynamic analysis of spectrum response based on SNI 1726-2019. The problem under review was how the placement and area of voids would affect the behavior of building structures if they were subjected to earthquake loads and gravity loads based on SNI 1726-2019, 1727-2013 and 1727-1989F. Evaluation of the analysis will be carried out on each structural model against the values of the Vibration Period, Basic Shear Force, Mass Participation Ratio and Inter-Floor Deviation with Spectrum Response Earthquake Analysis.
Based on the theory of structural performance, structures are said to be safe if they meet the requirements where they have the largest structural vibration period, the smallest base earthquake force, and the smallest inter-floor deviation. In the x-directional structure model, the greatest period of vibration in MDVH, the smallest base earthquake force at MDVU, the smallest inter-floor deviation value at MDVU. The selected x-directional building structure model is MDVU because it more predominantly meets the requirements of the theory hypothesis. Meanwhile, the avoided building structure model is MDVL because it is inversely proportional to the theoretical hypothesis. Whereas in the y-directional structure model the largest period of vibration in MDVH, the smallest base earthquake force at MDVU
is equal, the value of the deviation between the floors is smallest in MDVU. The y-directional building structure model that can be chosen is MDVU because it meets the requirements of the theory hypothesis. The avoided model of building structures is MDVL because it is inversely proportional to the hypothesis of the theory.

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