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All Journal Teras Jurnal Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Makara Journal of Technology
Rastandi, Josia Irwan
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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ALTERNATIF UJI BEBAN PADA STRUKTUR (STUDI KASUS : JEMBATAN BAJA) Soleh, Chairul; Rastandi, Josia Irwan
Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Vol 5, No 1 (2021): Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmstkik.v5i1.7215

Abstract

The most common structural load test that has been widely used is the static load test. An alternative to the structural load test is dynamic load test. Dynamic testing is a test carried out to determine level of structural stiffness or structural elements stiffness in the form of natural frequencies, while the static load test is intended to obtain responses of static loading from the structure in the form of deflection. The discussion will emphasize the correlation between static load test and dynamic load test. To correlate the static load test with the vibration test, a reference or value that comes from modeling or theoretical analysis is needed. Structural modeling is carried out to obtain the theoretical natural frequency and the theoretical deflection which will then be compared with the natural frequency of the vibration test (dynamic). If the frequency of the test results and the theoretical frequency are compared to the theoretical deflection, the prediction of the test deflection will be obtained. The correlation between the predicted deflection of the test and deflection of the static load test is quite close with a difference of less than 12%. Judging from the above correlation, periodic inspections of the tested structures can be considered for vibration testing only. The types of structures reviewed are simple span steel bridge structure, simple span + link slab steel bridge structure and continuous span steel bridge structure. Keywords: modeling; natural frequencies; vibration testing; static load test  AbstrakUji beban struktur yang umum dan sudah banyak dilakukan adalah uji beban statik. Alternatif lain dari uji beban adalah dengan melakukan pengujian vibrasi (dinamik) pada struktur. Pengujian vibrasi (dinamik) dilakukan untuk mengetahui tingkat kekakuan struktur atau elemen struktur berupa frekuensi alami, sedangkan uji beban statik dimaksudkan untuk mendapatkan respons hasil pembebanan statik dari struktur berupa lendutan. Pembahasan akan menekankan kepada korelasi antara uji beban statik dan uji beban vibrasi (dinamik). Untuk mengkorelasikan pengujian beban statik terhadap pengujian vibrasi (dinamik) diperlukan suatu acuan atau nilai yang berasal dari analisa pemodelan atau teoritis. Pemodelan struktur dilakukan untuk mendapatkan frekuensi alami secara teoritis dan lendutan teoritis yang kemudian akan dibandingkan dengan frekuensi alami hasil uji vibrasi (dinamik).  Jika frekuensi hasil uji dan frekuensi teoritis dibandingkan terhadap lendutan teoritis maka akan didapatkan prediksi lendutan uji. Hasil korelasi antara prediksi lendutan uji terhadap lendutan uji beban statik cukup mendekati dengan perbedaan kurang dari 12%. Dilihat dari korelasi diatas, maka untuk pemeriksaan berkala pada struktur yang telah diuji dapat dipertimbangkan untuk dilakukan pengujian vibrasi saja. Jenis struktur yang ditinjau adalah struktur jembatan baja simple span, simple span + link slab dan continuous span.
Experimental Study of Hollow-core Slab Containing Waste PET Bottles Orientilize, Mulia; Rastandi, Josia Irwan; Aries C., R. M. Dimas; P., Marsha Niken; S.S., Krisna Adi; Abimantrana, Abimantrana
Makara Journal of Technology Vol. 25, No. 1
Publisher : UI Scholars Hub

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Abstract

This study investigated the utilization of plastic-waste concrete as an effort to reduce urban waste problems. The waste plastic bottles were utilized to form the hollows of the hollow-core slabs (HCSs). The bottles were made of polyethylene terephthalate (PET). As a part of green research to reuse waste material, shredded PET was also added to the concrete mixture to improve the HCS strength. The cast-in-site HCS could be constructed without any difficulties. Three parameters were investigated: the effects of void content, shredded PET content, and steel-fiber (SF) content on the HCS ultimate bending capacity (Mu). Fifteen specimens were tested under static loads until failure, and the results were compared with those of the solid slab. Two different void contents 19% and 24% were studied. The other parameters were the shredded PET content (0.5% and 0.7%) and the SF content (0.19% and 0.32%). The Mu values of the HCS specimens were 12% to 16% less than that of the solid slab. However, the strengths were still within the theoretical capacity of the slab. The addition of the shredded PET could improve the HCS bending capacity by 18% to 38% compared with that of the solid slab. Similar results were also found for the specimens with SFs, whose Mu values were 11% to 46% greater than that of the solid slab.
Pengaruh Perubahan Temperatur Terhadap Struktur Jembatan Baja Nakhrowi, Imam; Rastandi, Josia Irwan; Delitriana, Arvilla
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 2 (2024): Volume 14 Nomor 2, September 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i2.1099

Abstract

Abstrak Kemajuan dalam teknologi rekayasa struktur telah membawa inovasi signifikan dalam pembangunan infrastruktur, termasuk pengembangan jembatan segmental baja. Studi ini bertujuan untuk menyelidiki dampak perubahan temperatur dan jenis perletakan terhadap perilaku struktur jembatan segmental baja, dengan fokus pada tiga kondisi perletakan yang berbeda: sendi-rol (SSC), sendi-sendi (FEC), dan penggunaan Lead Rubber Bearing (LRB). Pemodelan dilakukan menggunakan metode elemen hingga dalam perangkat lunak MidasCivil. Analisis finite element diarahkan untuk memahami deformasi dan distribusi tegangan dalam struktur jembatan di bawah beban mati dan variasi temperatur. Hasil studi menunjukkan bahwa perubahan temperatur menyebabkan deformasi yang signifikan pada struktur jembatan, dengan pola perilaku yang berbeda tergantung pada jenis perletakan. Perletakan Sendi-Rol dan penggunaan LRB cenderung menunjukkan respons deformasi yang serupa, sementara perletakan Sendi-Sendi menunjukkan perilaku yang berbeda. Selain itu, distribusi tegangan juga bervariasi tergantung pada kondisi perletakan, dengan Sendi-Sendi menghasilkan tegangan yang lebih tinggi pada beberapa titik tertentu. Kata kunci: Temperatur, Perletakan, Jembatan Segmental Baja, Finite Element,  Abstract                  Advancements in structural engineering have led to significant innovations in infrastructure development, notably segmental steel bridges. This study investigates the effects of temperature changes and different bearing conditions: simply supported condition (SSC), fixed end condition (FEC), and the implementation of Lead Rubber Bearing (LRB) on segmental steel bridge behavior. Utilizing finite element analysis use MidasCivil, the research examines deformation and stress distribution under dead loads and varying temperatures. Findings indicate temperature fluctuations induce significant deformations, with distinct responses based on bearing conditions. SSC and LRB show similar deformation patterns, while FEC behaves differently. Stress distribution varies accordingly, with FEC resulting in higher stresses at certain points. These insights enhance understanding of temperature and bearing effects on segmental steel bridges, informing maintenance strategies for durability. Validating computational models with field observations is recommended to ensure accurate simulations. Keywords: Temperature, Boundary Condition, Segmental Steel Bridge, Finite Element 
Co-Authors Abimantrana, Abimantrana Aries C., R. M. Dimas Delitriana, Arvilla Nakhrowi, Imam Orientilize, Mulia P., Marsha Niken S.S., Krisna Adi Soleh, Chairul