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Bartholomeus
Universitas HKBP Nommensen
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Social Sciences Transportation Other

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Pengaruh Model Perletakan Struktur Rangka Baja Sistem Bresing akibat Beban Gempa Bartholomeus, Bartholomeus; Pasaribu, Humisar
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 8 No. 2 (2024)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v8i2.15724

Abstract

Sistem struktur rangka baja bresing konsentris dan eksentris merupakan sistem struktur konstruksi yang termasuk dalam struktur yang tahan terhadap beban gempa. Pada penelitian ini, masing-masing sistem struktur rangka baja bresing konsentris dan eksentris tersebut dianalisis dengan model perletakan yang berbeda-beda mulai dari struktur dengan perletakan sendi, jepit, dan struktur yang menggunakan base isolator. Model struktur juga divariasikan dengan jumlah tingkat yang berbeda yaitu tingkat 3, 4, dan 5, namun dimensi lebar dan panjangnya dibuat sama. Tahap awal yang dilakukan pada penelitian adalah melakukan preliminary design dan pemodelan struktur. Kemudian dilanjutkan dengan penentuan data gempa riwayat waktu di permukaan. Setelah itu, dilanjutkan dengan penentuan parameter base isolator struktur, dan kemudian melakukan analisis struktur. Hasil analisis struktur menunjukkan kenaikan rata-rata periode struktur rangka bresing konsentris (SRBK) dari perletakan sendi dan jepit masing-masing adalah sebesar 2,20 dan 2,32 kali jika menggunakan perletakan base isolator. Sedangkan kenaikan rata-rata periode struktur rangka bresing eksentris (SRBE) dengan perletakan sendi dan jepit masing-masing adalah sebesar 2,07 dan 2,20 kali jika menggunakan perletakan base isolator. Selain itu, penggunaan base isolator pada struktur SRBK dan SRBE dengan jumlah tingkat dan periode struktur yang lebih tinggi akan membuat struktur akan lebih fleksibel dan belum tentu membuat struktur SRBK dan SRBE tahan gempa, namun dapat mengontrol struktur tersebut sehingga terhindar dari periode struktur dalam kondisi resonansi yang berbahaya.
IDENTIFIKASI MASALAH DAN USULAN SOLUSI UNTUK PENINGKATAN KESEJAHTERAAN DESA TOGU DOMU NAULI Pasaribu, Humisar; Bartholomeus; Silalahi, Rohani; Manalu, Indah Sari; Tambunan, Anggie
PROFICIO Vol. 5 No. 2 (2024): PROFICIO : Jurnal Abdimas FKIP UTP
Publisher : FKIP UNIVERSITAS TUNAS PEMBANGUNAN SURAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jpf.v5i2.3568

Abstract

Kuliah Praktek dan Pengabdian Masyarakat di Universitas HKBP Nommensen melibatkan mahasiswa dosen, masyarakat, pemerintah daerah, dan universitas itu sendiri, dengan berbagai manfaat bagi setiap komponen. Bagi mahasiswa melatih daya nalar dan pola pikir, meningkatkan pemahaman tentang masalah masyarakat, menambah wawasan dan pengalaman, serta membangun kreativitas, inovasi, dan kepercayaan diri. Masyarakat mendapatkan pengetahuan baru serta bantuan dalam merencanakan dan melaksanakan program pembangunan. Pemerintah daerah diuntungkan dengan percepatan pelaksanaan program pembangunan melalui bantuan tenaga dan pikiran mahasiswa, khususnya dalam bidang ekonomi, pertanian, dan pendidikan. Bagi Universitas HKBP Nommensen memperkuat kerja sama dengan masyarakat dan berbagai instansi, serta meningkatkan visibilitas dan reputasi universitas di mata masyarakat.
PREDIKSI PENURUNAN TIMBUNAN JALAN : STUDI KASUS: PENANGANAN DENGAN PRE-LOADING DI TEBING TINGGI, SUMATERA UTARA Bartholomeus; Humisar Pasaribu
Jurnal Teknik Sipil Vol 18 No 1 (2022): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v18i1.4592

Abstract

One method of handling soil that can be done to speed up the consolidation process is to add a Pre-Loading embankment on top of the plan embankment. In addition, this handling is also carried out to achieve a reduction by the design load, so that the settlement of embankment after the construction period still meets the required criteria and standards. This study was conducted to obtain a comparison of the prediction of embankment settlement with the empirical method using CPT data and the prediction of settlement using the Asaoka Method. In addition, the results of the consolidation coefficient will also be compared which can be used to determine the right time for Pre-Loading excavation during the construction period. The data used are CPT test data in the field as well as laboratory test data and measurement data for the settlement plate settlement closest to the position of the CPT test. From the analysis carried out, it is obtained that the prediction of decline using the Asaoka method is smaller than the prediction of decline using the empirical method using CPT data. In addition, from the analysis, it was found that at locations HB-04 and SP 70, as well as HB-07 and SP 91, showed laboratory consolidation coefficient values (cv-Lab.) which were close to the consolidation coefficients of the Asaoka Method (cv-Asa.), while in HB -05 and SP 79 and HB-06 and SP 85 show a large difference in values. The average comparison of the cv-Lab. consolidation coefficients and CV-Asa. is 58.5%.
Banana Stem Fiber Potential as an Alternative Natural Geosynthetic Material for Soil Reinforcement and Protection Bartholomeus, Bartholomeus; Purba, Luki Hariando; S P Manurung, Charles; Sihombing, Wanto Poller
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.5

Abstract

Geosynthetics for soil reinforcement and protection require tensile strength and the ability to absorb water. Based on previous studies, it was found that banana stem fibers have both of these mechanical properties of geosynthetics. However, these two strong mechanical properties are not enough for geosynthetic applications. Several other mechanical properties are needed. Therefore, geosynthetic samples were made using spun and woven banana stem fiber materials in this study. The spun was made with different diameters, namely 5 mm, 7.5 mm, and 10 mm, and woven like a mat for one direction of tensile force. Then, additional tests were carried out in addition to tensile strength and water absorption, such as tear strength, puncture strength, and permeability based on permittivity. From the test results, only the woven fabric with a 5 mm spun diameter meets all requirements except for its permittivity value, where the average tensile strength, average tear strength, and average puncture strength obtained for elongation <50% are 32.0 kN/m, 628.7 N, and 1915.8 N, respectively. At the same time, the average water absorption for all diameter variations is 408.07% to 441.86%. So banana stem fibers, especially those with a 5 mm spun diameter, have the potential as an alternative natural geosynthetic material for soil reinforcement and protection by considering the spun fiber woven pattern to improve the permittivity.
Co-Authors Humisar Pasaribu Manalu, Indah Sari Pasaribu, Humisar Purba, Luki Hariando S P Manurung, Charles Sihombing, Wanto Poller Silalahi, Rohani Tambunan, Anggie