PERFORMANCE COMPARISON OF QUALIFY AND UNQUALIFY HORIZONTAL IRREGULAR STRUCTURES OF SNI 1726:2019 ON EARTHQUAKE RESISTANT STEEL STRUCTURE

• Main Author: Yonanda, Gita
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/67008
• Institution: Institut Teknologi Bandung

Indonesia has a high potential for earthquake incident. The earthquake can destroy building and endanger population's safety. Therefore, earthquake is one of the important aspects considered in design process of building structures. Variations of building plans effect structures category into horizontal irregular structures based on seismic provisions such as SNI 1726-2019. Variations in the L plan can cause an eccentricity of the mass center to the rigidity center of the structure, so it can cause a torsional effect. Therefore, SNI 1726:2019 regulates several consequences that must be fulfilled if a building is designed to have horizontal irregularities including torsion. Fulfillment of these requirements indicates a conservative design and requires considerable costs. Often it is found that there are violations of these regulations in order to seek the most cost-effective design. In this final project, a study is conducted on performance comparison ofqualify and unquality horizontal irregular structures to the consequences of SNI 1726:2019 using pushover analysis. The structure is modeled as a special moment resisting steel frame structure. The building functions as a six-story office building located in Jakarta with soft soil category, SE. The evaluation will be reviewed in terms of the capacity curve, ductility, strength factor, performance point, plastic hinge formation, and energy dissipation. Based on the analysis results, the structure that meets the requirements shows greater stiffness, strength (overstrength), and ductility parameters. The formation of plastic hinges in beams occurs more in structures that meet the requirements so that energy absorption is also greater. Unqualified structures fail early in the column before the other elements reach further yielding levels. Dimensional enlargement in the critical region due to torsion is able to overcome failures that are concentrated in that area.