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Sukamdo, Pariatmono
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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Journal : Jurnal Rekayasa Sipil

 1 
Static and Dynamic Response of Curved Concrete Frame Structures (Case Study: Jakarta International Stadium) Sanjaya, Arif; Sukamdo, Pariatmono
Rekayasa Sipil Vol 13, No 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jrs.2024.v13.i1.03

Abstract

An ideally designed building should be symmetrical to mitigate eccentricities between the center of mass and the center of stiffness during seismic events. However, suppose a special design is intended to enhance the aesthetics and visual appeal of a building. In that case, it should still be engineered to perform well in static and dynamic behaviours. Jakarta International Stadium is an example of a building with a circular shape, irregular vertical geometry, and lacks expansion joints. This research investigated the static and dynamic behaviours of four structural models: the entire building without expansion joints (model ND) andthe building with expansion joints (models D1, D2, and D3). The analysis included internal forces, mode shape analysis, structural displacements, inter-story drifts, and base shear forces. The analysis is conducted using the SAP2000 v22 software. The analysis results indicated that the models with expansion joints in Jakarta International Stadium generally exhibit several positive effects. These included reducing structural displacements, inter-story drifts, internal forces, and base shear forces. Furthermore, all modalities remain within the standard limits SNI 1726-2019 set.
Analisis Tekuk Probabilistik Pada Batang Tekan dari Baja Ringan Oktavia, Tuti; Sukamdo, Pariatmono
Rekayasa Sipil Vol 13, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jrs.2024.v13.i2.06

Abstract

Lightweight steel profiles have relatively thin thickness dimensions with the ratio of the dimensions of the width of each profile element to the thickness is very large, making it prone to bending. In SNI 8399:2017, mentions tolerances for geometric imperfections Bow (bw) (in the perpendicular direction Z-Z),  Twist (h) (X-X direction), Camber, profiles C, Z, U. SNI 8399: 2017 has not been explained what kind of decrease in column strength against  these geometric imperfections. In this study, an analogy was made to the measurement of imperfections in the geometry of the decapitated cone plate  conducted by Pariatmono, 1994. In Pariatmono's research, data  from the circular axis was changed into a horizontal axis by taking several angles in a circle, in this study it was taken every 6º (60 data in one row) and used as data with probablistic behavior. Then from the 60 rods obtained, Fourier analysis was carried out to obtain geometric imperfection equations. From these 60 bars obtained each Fourier coefficient. Then the average is taken, averaging +10%, +20%, +30%, +40%, +50% and -10%, -20%, -30%, -40% and -50% of the standard deviation values. Of the 11 rods, a non-linear buckling analysis was carried out using ANSYS Workbench 2022 R1. The probabilistic compressive analysis of geometric imperfections conducted in this study has not been able to definitively provide a general idea of the limits of geometric imperfections.
PENGEMBANGAN SPEKTRA RESPONS DARI GEMPA RIWAYAT WAKTU PALU 2018 Rifaldy, Indra; Sukamdo, Pariatmono
Rekayasa Sipil Vol 14, No 1 (2025)
Publisher : Universitas Mercu Buana

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Abstract

Indonesia is at the summit of three world plates – the Indonesian plate – Australia, the Eurasian plate, and the Pacific plate, so the earthquake activity that occurs in Indonesia is quite high. On Friday, September 28, 2018, at 18:02 WITA there was an earthquake that shook Palu M 7.4 and a depth of 10 km. This study aims to build a response spectrum from the 2018 Timeline Earthquake. The maximum spectral values of the vibration are obtained at each vibration period value of the T structure and then imploted into such a vibration spectrum, indicating that the beginning of the production of the response spectrum begins with the calculation of the angular velocities and periods of vibration of wi and Ti on the information of the behavior of ki and mi masses. The numerical method of the Central Difference uses an approach to the derivative value of a time function or a derivative of the time movement, both for velocity parameters and acceleration parameters. The SDOF response consists of a two-dimensional structure analysis by inserting the parameters of the Palu Response Spectrum 2018 with the help of a program to determine how the SDOF Response is. Development of the displacement response spectrum HNE 160,60 cm T2,98 sec, HNN 230,09 cm T4,69 sec, and HNZ 94.43 cm T4,97 sec. Velocity HNE maximum 335,79 cm/d T2,98 seconds, HNN 307.30 cm/de T4,69 sec, and HNZ 143,98 cm/sec T2,11 sec. Acceleration HNE 1480 cm/det2 T0,23 seconds; 1850 cm/det2 T 0,38 sec and HNZ 3773 cm/sec2 0,12 sec.
Co-Authors Arif Sanjaya Dzikri Fauzan, Ahmad Mohammad Ihsan Octaviani, Rien Oktavia, Tuti Ontowirjo, Budianto Resmi Bestari Muin Resmi Bestari, Resmi Rifaldy, Indra Setiyadi, Syukur Sitompul, Sang Toga