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All Journal Jurnal Konstruksia SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Portal: Jurnal Teknik Sipil Journal La Multiapp Rengganis Jurnal Pengabdian Masyarakat Jurnal Talenta Sipil
Ahmad Zarkasi
Program Studi Teknik Sipil, Fakultas Teknik, Universitas Muhammadiyah Mataram
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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Journal : Journal La Multiapp

 1 
Experimental Study on the Utilisation of Independent Wire Fibre Core Steel Wire Rope Braces to Enhance the Stability of a 2d Concrete Portal against Lateral Forces Zarkasi, Ahmad; Fitrayudha, Adryan; Hidayati, Nurul; Santika, Yuliana; Marsa D.P, Khendy
Journal La Multiapp Vol. 6 No. 3 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i3.2170

Abstract

Structural stability in construction, especially in buildings exposed to lateral forces due to earthquakes, is very important to consider. This research aims to explore the effectiveness of using Independent Wire Fibre Core (IWFC) steel wire rope braces in strengthening two-dimensional (2D) concrete portals. The method used is a series of laboratory tests to measure the performance of concrete portals equipped with IWFC braces. Concrete portals with dimensions of 1.00 m in the width direction and 1.50 m in the height direction were tested with lateral loading to simulate the effects of earthquakes. The test results showed that the use of IWFC braces increased the load resistance capacity of the portal by 16.13%, from 14.00 kN to 26.13 kN, and reduced the deviation by 30.43%, from 2.30 mm to 1.68 mm. In addition, the analysis showed an increase in the response modification factor (R) from 4.69 to 5.03, while the Cd value of the non-braced portal was 3.29 using braces was 3.02 and the Ω0 value of the non-braced portal was 3.50 and after using braces was 2.84. These findings open up opportunities for the application of better structural strengthening techniques in order to improve the safety and stability of buildings in earthquake-prone areas.
Sustainable Utilisation of Beach Sand as Fine Aggregate Replacement and Its Effect on Concrete Strength with Admixtures Reinforcement Hamdani, Hafiz; Zarkasi, Ahmad; Fitrayudha, Adriyan; Akhsae, I Gede Anaga; Pratama, Khendy Marsha Duta
Journal La Multiapp Vol. 6 No. 3 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i3.2171

Abstract

This research was conducted to review the feasibility of beach sand from the Batu Bolong village of West Lombok Region as an alternative fine aggregate in concrete manufacturing. The background of this research is based on the decreasing supply of sand from rivers and mountains. The main objective of this research was to evaluate the compressive strength of concrete using beach sand, both with and without a washing process, and assess whether this material could be applied in structural construction. In addition to technical aspects, the local community's habit of utilizing beach sand is also part of the consideration in this study. The result oh the tests showed that the compressive strength of normal concrete without admixtures at 3, 7, and 28 days of age were 16.42 MPa, 19.21 MPa, and 23.39 MPa, respectively. The addition of the "BETON MIX" admixture increased the strength to 20.78 MPa, 23.38 MPa, and 26.44 MPa. Meanwhile, concrete using washed beach sand showed compressive strengths of 22.67 MPa, 23.61 MPa, and 25.16 MPa. The concrete with unwashed beach sand produced strengths of 21.72 MPa, 22.40 MPa, and 23.08 MPa. The results of this study indicate that sand from Batu Bolong beach has the potential to be a substitute for fine aggregate in concrete. However, its use must still consider ecological impacts so as not to disturb the balance of the coastal environment.
Analysis of Spun Pile Bearing Capacity Based on SPT Data Using the Luciano Decourt and Tomlinson Methods Setyawan, Rizwan Aziez; Hamdani, Hafiz; Pujiastuti, Heni; Zarkasi, Ahmad
Journal La Multiapp Vol. 7 No. 2 (2026): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v7i2.2939

Abstract

Spun pile foundations were used in the construction of the Mayor's Office Building in Jempong Village, Mataram City, West Nusa Tenggara Province, as elements that transfer structural loads to more stable soil. This study aims to analyze the bearing capacity of spun pile foundations manually to obtain the ultimate bearing capacity and allowable bearing capacity values by comparing the Luciano Decourt and Tomlinson methods based on SPT data. Through this analysis, it is hoped that the most efficient and appropriate method for application in the soil conditions in the area can be determined. Based on the calculation results, the Luciano Decourt method produced a bearing capacity and allowable bearing capacity of 137,344 tons and 54,938 tons, respectively, while the Tomlinson method produced a bearing capacity and allowable bearing capacity of 89,489 tons and 35,795 tons, respectively. It can be concluded that the most efficient and appropriate method to use in pile foundation planning for the soil conditions in the area is the Tomlinson method because it produces a more conservative bearing capacity. The use of this conservative bearing capacity can help avoid the risk of foundation failure.
Co-Authors Adryan Fitrayudha Akhsae, I Gede Anaga Amaelisa, Viara Anwar Efendy Aulia Muttaqin Cahya, Serdian Eska Chairil Anhar Dodik Kusumawanto Ekasapta, Febrian Erni Yustissiani Fariyadin, M. Ruslin Anwar, Indradi Wijatmiko, Adiman Feri Irawan Hadi Rasikhun Hady Rasikhun Hafiz Hamdani Haidir Azim Hamdani, Hafis Hamdani, Hafiz Hariyadi Hariyadi Heni Pujiastuti Heni Pujiastuti Intan Novianti Isfanari Isfanari Khalis Ilmi, Muhammad Marsa D.P, Khendy Maya Saridewi Pascanawati Mega Fatimah Rosana Muhammad Basir Muhammad Deni Kurniawan Muhammad Khalis Ilmi Nurul Hidayati Nurul Hidayati Prakoso, Andika Pratama, Khendy Marsha Duta Puteri Samengasbumi, Ringgi Rajabi Mubarak Ramadhan Hidayat, Ari RR. Ella Evrita Hestiandari Safitri, Nura Sahlinda, Ranni Samengasbumi, Ringgi Puteri Santika, Yuliana Setyawan, Rizwan Aziez Sukuryadi, Sukuryadi Swahip, Swahip Syarifunnaji Ridho Titik Wahyuningsih Toyyib, Mukhtar Ubaidillah, Aji Syailendra