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I Gede Adi Susila
Program Studi Teknik Sipil Fakultas Teknik Universitas Udayana
Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media

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Journal : Journal of International Conference Proceedings

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Strengthening Using Type-V Bracing for Structural Integrity of Reinforced Concrete Frame Resists Earthquake Loads Made Sukrawa; I Gede Adi Susila; Aditya Permana Putra
Journal of International Conference Proceedings (JICP) Vol 2, No 1 (2019): Proceedings of the 3rd International Conference of Project Management (ICPM) Bal
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/jicp.v2i1.434

Abstract

Relatively new seismic code has been introduced in Indonesia (SNI 1726-2012) which affects old structures. Mostly, the existing structures does not meet the requirement of new regulation: overstressed. Therefore, it is important to strengthen reinforced concrete (RC) structure in order to meet the performance level and structural behaviour satisfied. In this study, the retrofitting method was performed by using a type V steel braces both external and internal settlement. Clearly, the advantage of braces is significantly increases lateral capacity where small amount of mass also invoked into the structures. Computer simulation using SAP2000 found that most of the structures have been overstress on its components, indeed reinforcement is necessary with braces. Nonlinear pushover analysis was performed on type-V braces with and without perimeter frames which reviewed structural performances. Evaluation of 3, 5, 8 and 10 storey structures designed under previous code and failures of structural components found after the most recent code to be implemented. Lateral load capacity and structural performance were observed to determine the capability dissipate earthquake energy that occurred in structural components with plastic joints distribution. Results of study provides comparison of behaviour and performance of each model. It found that the ultimate capacity of each model produced can increase base shear up to ± 150% larger compared to the existing structures. From pushover analysis, the curve of each model measured for performance level and it found to be set of the Operational (O), Immediate Occupancy (IO) and it has not been exceeded the Live Safety level (LS) as the result of structural strengthening using bracing. The bracing applied will provide a higher lateral capacity and minimum level of damage.
STRENGTHENING STRATEGY APPLIED FOR REINFORCED CONCRETE (RC) FRAME STRUCTURE USING STEEL BRACES AFTER LOMBOK EARTHQUAKE (CASE STUDY: PARKING-LOT OF MALL BALI GALERIA-MBG) Sutarja I.N; I Gede Adi Susila
Journal of International Conference Proceedings (JICP) Vol 2, No 1 (2019): Proceedings of the 3rd International Conference of Project Management (ICPM) Bal
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/jicp.v2i1.435

Abstract

Lombok Earthquake 2018 was very rare and interesting phenomenon to be taken into consideration due to its behavior. The pattern of seismicity was up and down which gives panic and confusion, especially to the public who live in Lombok, Bali and Sumbawa. There were at least six earthquakes with magnitudes of 5.5 to 6.9 ML in a short interval between 29th July to August 25, 2018. The earthquake caused structural damages in Lombok as well as in Bali region. The case study has been taken to cover 4-storey RC frame of MBG building which located in Kuta, Bali. Damage occurs on columns, beams. Beams and pre-printed reinforced concrete plates and reinforced concrete columns in place. Analysis has been applied into existing structure and stress ratio analysis check has also been taken in order to find failures. Overstresses has been found at the columns and beams, therefore, the strengthening is needs. Strengthening strategy using braces of Wide Flange-IWF, typically a cross bracing (X) method has been taken into account in order to find out the structural behavior as well as the performance level of building. Braces has been invoked for both: transverse and longitudinal directions of buildings and most of the beams and columns were reinforced by using Fiber. This strengthening has been done very nicely and the parking-lot building has been tested and it can be used regularly as it is.
Co-Authors Aditya Permana Putra Firman Hadi Suprapto I Gede Gegiranang Wiryadi I Gusti Agung Ananda Putra I Ketut Diartama Kubon Tubuh I Ketut Sudarsana I Ketut Sudarsana I Nyoman Sutarja I Wayan Prima Widiantara Ida Bagus Dharma Giri Luh Putu Eka Anggreni Made Sukrawa Naghi Sanjaya, I Made Dwira Sastraningsih, Ni Wayan Widiarsa, Ida Bagus Rai Yana, Anak Agung Gde Agung Yundari, Yundari