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All Journal Teknika: Jurnal Sains dan Teknologi Fondasi: Jurnal Teknik Sipil APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) ABDIKARYA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Civil Engineering For Community Development Logistic and Operation Management Research
Darwis, Zulmahdi
Universitas Sultan Ageng Tirtayasa
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation Veterinary Other

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Design Of Reinforced Concrete Slender Columns In a 3-Story Residential Building Nugroho, Angga Fandam Wahyu; Baehaki, Baehaki; Soelarso, Soelarso; Darwis, Zulmahdi
Jurnal Fondasi Vol 13, No 2 (2024)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fondasi.v13i2.29067

Abstract

In some building designs that carry a high aesthetic or architectural value, the use of flat columns brings a number of significant advantages. Their slender design provides more flexibility in interior layout and adds to the aesthetic value of the building. This study was conducted to determine the reinforcement requirements and behavior of flat columns as well as checking the displacement in accordance with SNI 1726:2019. The results show that column I and column L are categorized as swaying and long columns, while column T and column Plus are included in the category of non-swaying and short columns. The required reinforcement requirements are as follows: For column I with dimension 130 x 800, 10D16 main reinforcement is required with D10-100 mm stirrups inside the plastic joint area and D10-150 mm outside the plastic joint area. Column L of dimension 130 x 500 requires 16D16 main reinforcement with D10-100 mm stirrups both inside and outside the plastic joint area. T columns of dimension 130 x 500 require 10D16 main reinforcement with D10-100 mm stirrups inside and outside the plastic joint area. Plus columns of dimension 130 x 400 require 12D16 main reinforcement with D10-100 mm stirrups inside and outside the plastic joint area. The maximum defelction that occurs is still within the permissible tolerance limits of 15.32 mm in the X direction and 11.15 mm in the Y direction so that the building structure is declared safe and stable against the loads received in accordance with SNI 1726: 2019.
Analysis of Optimization of Cross-Sections and Reinforcement of Building Structures Based on SNI 2847-2019 and SNI 1726-2019 Rizik, Ahmad Farhan; Soelarso, Soelarso; Baehaki, Baehaki; Darwis, Zulmahdi
Jurnal Fondasi Vol 13, No 2 (2024)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fondasi.v13i2.29069

Abstract

Efficiency in structural design is important to optimize the use of materials and costs, while maintaining strength and stability to ensure the safety of the building. With construction design regulations constantly updated, careful and precise planning calculations are crucial. This study identifies overdesign in columns, beams, and foundations of existing buildings, and aims to determine more optimal and efficient dimensions and repetitions, resulting in stronger, more economical, and standard-compliant buildings. The research was conducted in a 4-storey office building with dimensions of 32 x 15,725 meters will be analyzed based on SNI 2847:2019, SNI 1726:2019, and SNI 1727:2020. The analysis was carried out using Microsoft Excel and ETABS. The results of the study showed that there was overdesign in the main column, main beam, and foundation. On a beam of 400mm x 650mm it produces an efficiency of 17.46%. The bending reinforcement requirement results in an efficiency of 21.785%. Meanwhile, the shear reinforcement and middle reinforcement are the same as the initial planning. In a 450mm x 700mm column it produces an efficiency of 16%. For shear reinforcement, an efficiency of 10% is obtained. As for the bending reinforcement, it is the same as the initial planning. In the foundation design, 4 square piles with dimensions of 450mm x 450mm and pilecap dimensions of 2600mm x 2600mm x 500mm with reinforcement requirements for the x direction D22-100 and the y direction D22-125. Resulting in a pilecap volume efficiency of 28.888%.
Design Of Reinforced Concrete Slender Columns In a 3-Story Residential Building Wahyu N, Angga Fandam; Baehaki, Baehaki; Soelarso, Soelarso; Darwis, Zulmahdi
Jurnal Fondasi Vol 13, No 2 (2024)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v13i2.32719

Abstract

In some building designs that carry a high aesthetic or architectural value, the use of flat columns brings a number of significant advantages. Their slender design provides more flexibility in interior layout and adds to the aesthetic value of the building. This study was conducted to determine the reinforcement requirements and behavior of flat columns as well as checking the displacement in accordance with SNI 1726:2019. The results show that column I and column L are categorized as swaying and long columns, while column T and column Plus are included in the category of non-swaying and short columns. The required reinforcement requirements are as follows: For column I with dimension 130 x 800, 10D16 main reinforcement is required with D10-100 mm stirrups inside the plastic joint area and D10-150 mm outside the plastic joint area. Column L of dimension 130 x 500 requires 16D16 main reinforcement with D10-100 mm stirrups both inside and outside the plastic joint area. T columns of dimension 130 x 500 require 10D16 main reinforcement with D10-100 mm stirrups inside and outside the plastic joint area. Plus columns of dimension 130 x 400 require 12D16 main reinforcement with D10-100 mm stirrups inside and outside the plastic joint area. The maximum defelction that occurs is still within the permissible tolerance limits of 15.32 mm in the X direction and 11.15 mm in the Y direction so that the building structure is declared safe and stable against the loads received in accordance with SNI 1726: 2019.
Analysis of Optimization of Cross-Sections and Reinforcement of Building Structures Based on SNI 2847-2019 and SNI 1726-2019 Rizik, Ahmad Farhan; Soelarso, Soelarso; Baehaki, Baehaki; Darwis, Zulmahdi
Jurnal Fondasi Vol 13, No 2 (2024)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v13i2.32521

Abstract

Efficiency in structural design is important to optimize the use of materials and costs, while maintaining strength and stability to ensure the safety of the building. With construction design regulations constantly updated, careful and precise planning calculations are crucial. This study identifies overdesign in columns, beams, and foundations of existing buildings, and aims to determine more optimal and efficient dimensions and repetitions, resulting in stronger, more economical, and standard-compliant buildings. The research was conducted in a 4-storey office building with dimensions of 32 x 15,725 meters will be analyzed based on SNI 2847:2019, SNI 1726:2019, and SNI 1727:2020. The analysis was carried out using Microsoft Excel and ETABS. The results of the study showed that there was overdesign in the main column, main beam, and foundation. On a beam of 400mm x 650mm it produces an efficiency of 17.46%. The bending reinforcement requirement results in an efficiency of 21.785%. Meanwhile, the shear reinforcement and middle reinforcement are the same as the initial planning. In a 450mm x 700mm column it produces an efficiency of 16%. For shear reinforcement, an efficiency of 10% is obtained. As for the bending reinforcement, it is the same as the initial planning. In the foundation design, 4 square piles with dimensions of 450mm x 450mm and pilecap dimensions of 2600mm x 2600mm x 500mm with reinforcement requirements for the x direction D22-100 and the y direction D22-125. Resulting in a pilecap volume efficiency of 28.888%.
Reinforcement Design of Transfer Beams in a three-Story Residential Building Usnawa, Hamid Wafiq; Soelarso, Soelarso; Baehaki, Baehaki; Darwis, Zulmahdi; Rahma, Midia
Jurnal Fondasi Vol 14, No 1 (2025)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v14i1.32287

Abstract

Residential buildings are buildings that are used as residences, for example, houses. In residential buildings that carry modern aesthetics will make the shape of the plan tend to be irregular, so it is necessary to adjust structural elements such as slender columns and transfer columns. A transfer column is a column that rests on a beam (grows across the beam), so the column is not continuous from the bottom floor to the top, while the beam is called a transfer beam. Transfer beams allow load distribution from the upper floors to the structural elements below. This study was conducted to determine the reinforcement requirements of transfer beams in a three-story residential building in accordance with SNI 2847: 2019. Structural analysis was carried out with the ETABS v9.7.1 program and manual calculations to determine the reinforcement configuration of the transfer beam. The result of the research is that the transfer beam with dimensions of 350 mm x 650 mm has a reinforcement configuration, namely 4D19 tensile and 6D19 compressive reinforcement in the support area, and 12D19 tensile and 6D19 compressive reinforcement in the field area, for stirrup reinforcement used 3D12 - 100 mm and for torsion reinforcement used 2D16. As for the deflection that occurs, which is 7,782 mm, this value is still within the permit limit according to SNI 2847: 2019. It can be concluded that the transfer beam is safe to use.
Changes in The Flexural Strength Characteristics of Concrete Due To The Effect of Coconut Fiber Addition on Normal Concrete Darwis, Zulmahdi; Baehaki, Baehaki; Soelarso, Soelarso; Fathonah, Woelandari; Rahma, Midia; Ramadhan, Malik Agung
Jurnal Fondasi Vol 14, No 1 (2025)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v14i1.32200

Abstract

Concrete has high compressive strength, long durability, and easy maintenance. Innovation in using waste such as coconut fibers can improve the mechanical quality of concrete, reduce pollution, and provide added economic value. Fiber concrete is commonly used on broad structural elements to overcome expansion shrinkage due to oxidation, temperature, and evaporation. This study aims to determine the effect of the addition of coconut fiber waste and the optimum percentage on the bending strength characteristics of concrete. This research method is an experiment that compares the results of the bending strength test with the consideration of deflection that occurs on the force received from the variation of coconut fibers as much as 0%, 1.75%, 2.25%, and 2.75% of the weight of cement with a coconut fiber length of 65 mm, a planned quality of f'c 20 MPa, and using test specimens measuring 15 cm x 30 cm for cylinders and 15 cm x 15 cm x 60 cm for beams. Based on analysis and discussion, the addition of coconut fibers influences increasing flexural strength for a certain percentage with the addition of coconut fibers as much as 2.25% of the weight of cement showing the best flexural strength value with less deflection produced than other variations of fiber concrete at the same amount of force when charged.
PCI Girder Analysis on Bridge Structure (Case Study: Main Bridge Simpang Susun Cikulur STA 37+425.65 Serang-Panimbang Toll Road Project) Rizka Apriliani; Soelarso Soelarso; Baehaki Baehaki; Zulmahdi Darwis; Midia Rahma; M. Hasbi Zuher
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.41086

Abstract

This study discusses the analysis of PCI Girder on bridge structures. The purpose of this study is to determine the pretension force, loss of prestress, and deflection that occur in the PCI Girder in the case study of the Main Bridge Sumpang Susun Cikulur STA 37+452,650 Serang-Panimbang Toll Road Project. The bridge that was used as a review in this study was a bridge with a span of 20.6 m. The structural element analyzed is the PCI Girder with 2 tendons. The loading regulations used in the analysis refer to SNI 1725:2016, and the analysis of the bridge structure is based on SNI 2847:2019. The results of the analysis showed that the PCI Girder on the Main Bridge Simpang Susun Cikulur STA 37+452.65, Serang-Panimbang Toll Road Project, received an initial prestressed force of 5833.14 kN and decreased to 4901.50 kN in the final condition. The loss of prestressed force that occurred consisted of 8% for immediate loss and 11.72% for time-dependent loss. In addition, the deflection experienced by the girder was 29.91 mm upward under the transfer condition, 13.48 mm upward due to short-term loading, and 60.45 mm downward due to long-term loading.
Field Testing and Concrete Quality Analysis for Column, Beam and Floor Slab Structures at Siloam Silampari Hospital, Lubuk Linggau City using the Ultrasonic Pulse Velocity (UPV) Method M. Hasbi Zuher; Zulmahdi Darwis; Soelarso Soelarso; Baehaki Baehaki; Midia Rahma; Abdurohim Abdurohim; Arief Budiman; Ina Asha Nurjanah
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.41195

Abstract

The construction of tall buildings is inextricably linked to various quality standards, which are used to create safe and comfortable buildings for occupants, users, and surrounding buildings. Concrete quality testing is one of the necessary tests performed on construction projects to ensure that towers or tall buildings comply with existing standards and regulations. Testing concrete structures after casting is crucial to ensure they conform to the intended design. Various types of testing can be performed, including non-destructive testing (NDT), semi-destructive testing (SDT), and destructive testing (DT). In this study, we used the Ultrasonic Pulse Velocity (UPV) testing method. Concrete testing using UPV is one of the tests that is more widely used because of the satisfactory results using ultrasonic waves and requires relatively low costs compared to other testing methods. The results obtained were in the Good Concrete Quality Category from the total sample of test points. The minimum concrete compressive strength requirement is 21 MPa for special structural concrete quality based on SNI-2847-2019.
PENDAMPINGAN REHABILITASI RUANG KELAS DAN PEMBANGUNAN TOILET PADA PROGRAM REVITALISASI SLB DI SKH AL KHAIRIYAH CILEGON Woelandari Fathonah; Rama Indera Kusuma; Enden Mina; Ina Asha Nurjanah; Prastika Wahid Santoso; Restu Wigati; Muhammad Fakhruriza Pradana; Zulmahdi Darwis; Syahdan Raihan; Mekro Permana Pinem
Civil Engineering for Community Development (CECD) Vol 5, No 1 (2026): Edisi April 2026
Publisher : Department of Civil Engineering Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/cecd.v5i1.40345

Abstract

Program revitalisasi Sekolah Luar Biasa merupakan upaya pemerintah dalam meningkatkan kualitas sarana dan prasarana pendidikan inklusif. Dalam pelaksanaannya, satuan pendidikan sering menghadapi keterbatasan dalam melakukan pengendalian mutu dan monitoring pekerjaan konstruksi. Kegiatan pengabdian ini bertujuan untuk melakukan pendampingan terhadap pelaksanaan rehabilitasi ruang kelas dan pembangunan toilet di SKh Al Khairiyah Cilegon dalam program revitalisasi SLB. Metode yang digunakan adalah observasi lapangan secara berkala, verifikasi kesesuaian pekerjaan terhadap dokumen perencanaan, serta penyusunan rekomendasi teknis. Hasil kegiatan menunjukkan bahwa pelaksanaan pekerjaan berjalan dengan baik dan cenderung lebih cepat dibandingkan rencana. Meskipun demikian, masih ditemukan beberapa ketidaksesuaian teknis seperti pemasangan elemen aksesibilitas yang belum sesuai standar serta kualitas finishing yang belum optimal. Pendampingan yang dilakukan mampu membantu pihak sekolah dalam mengidentifikasi permasalahan serta melakukan perbaikan secara langsung.
The Effect of Epoxy Resin on the Compressive Strength of Short Laminated Bamboo Columns Zulmahdi Darwis; Achmad Basuki; Muhammad Yani Bhayusukma; S A Kristiawan; Javil Egi Pratama Abdurahman; Muhammad Adha Ilhami
Logistic and Operation Management Research (LOMR) Vol. 4 No. 1 (2025): Logistic and Operation Management Research (LOMR)
Publisher : Research Synergy Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31098/lomr.v4i1.3179

Abstract

The ongoing depletion of global timber resources has increasingly directed attention toward bamboo as a viable and sustainable structural alternative. This study investigated the influence of epoxy resin coatings on the compressive performance of short laminated bamboo columns. Three treatment conditions were evaluated: untreated (control), epoxy resin-coated, and externally reinforced with steel plates. The test specimens, manufactured using Dendrocalamus asper, were subjected to axial compression by SNI 03-3959:1995. Before testing, the physical and mechanical properties of both bamboo and steel reinforcement materials were characterized. Experimental results indicated that epoxy coating enhanced the average compressive strength by 2.54%, whereas steel plate reinforcement yielded a more substantial increase of 9.94% relative to the control group. One-way ANOVA analysis confirmed that only the steel-reinforced group demonstrated a statistically significant improvement in compressive capacity (p < 0.05). The observed failure modes revealed that the untreated and epoxy-coated specimens were prone to surface cracking and adhesive delamination, whereas the steel-reinforced columns exhibited a more localized damage with reduced deformation. It was concluded that although epoxy resin provided a modest enhancement, applying steel reinforcement significantly improved the axial load-bearing capacity of laminated bamboo columns. These findings underscore the structural potential of hybrid bamboo composites for sustainable construction applications.
Co-Authors Abdul Azis Rahmat Abdurohim Abdurohim Achmad Basuki Aditya Pratama Amelia Rizqiyanti Arief Budiman Axel Xavier Delpiero Baehaki, Baehaki Bambang Adhi Priyambodo Enden Mina, Enden Fathonah, Woelandari Fathonah, Woelandari Fathonah, Woelandari Haryadi Haryadi Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Hendrian Budi Bagus Kuncoro Heri Kusharyanto Hery Supriyadi Ina Asha Nurjanah Javil Egi Pratama Abdurahman Jenfatika Chandra Jonathan Sitorus Kusuma, Rama Indera M. Hasbi Zuher M. Hasbi Zuher Mekro Permana Pinem Midia Rahma Midia Rahma Mina, Enden Muhammad Adha Ilhami Muhammad Afiff Isnaini Muhammad Fakhruriza Pradana, Muhammad Fakhruriza Muhammad Gilang Prabowo Muhammad Isa Ismail Muhammad Yani Bhayusukma Nugroho, Angga Fandam Wahyu Nurjanah, Ina Asha Nurrochmat, Cahyadi Prastika Wahid Santoso Prastyani Prastyani Priyambodho, Bambang Adhi Qurrotul Milania Radityagifari, Muhamad Rahma, Midia Rahma, Midia Rahma, Midia Rama Indera Kusuma Ramadhan, Malik Agung Restu Wigati, Restu Rezka Mugri N.R Rifky Ujianto Riyadi, Andry Afrizal Rizik, Ahmad Farhan Rizka Apriliani Rully Nurul Ashar Soelarso . Soelarso Soelarso Soelarso Soelarso, Soelarso Soelarso, Soelarso Soelarso, Soelarso Soelarso, Soelarso Stefanus Adi Kristiawan Subekti, Subekti Syahdan Raihan Syahid, Mushab Abdu Asy Tb Ahmad Faisal Ujianto, Rifky Usnawa, Hamid Wafiq Wahyu N, Angga Fandam Wili Bakhtiar Wiraningrum, Widya Zeldi Zainaldi Zulfathir, Reza