Claim Missing Document
Check
Articles

Found 3 Documents
Search

Nonlinear Time-History Evaluation of Interstory Lead Rubber Bearing (LRB) Isolation in Reinforced Concrete Buildings Angela Ayu Putri; Josia Irwan Rastandi; Jessica Sjah
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.9654

Abstract

Seismic isolation is widely recognized as an effective strategy for mitigating earthquake-induced structural response. However, most studies have focused on base-isolated systems, whereas interstory isolation remains less explored. In particular, research on interstory LRB isolation for multistory reinforced concrete buildings in Indonesia remains limited. This study investigates a 13-story reinforced concrete dual-system building equipped with interstory Lead Rubber Bearing (LRB) isolators between the first and second floors. Two configurations are considered: fixed-base and interstory-isolated models. Seismic performance is evaluated through nonlinear time-history analysis using eleven ground-motion record pairs selected to represent Indonesian seismic hazard conditions, with nonlinear behavior considered for the isolators and critical ground-story elements. This study contributes to the limited research on interstory LRB isolation by clarifying how seismic demands are redistributed in a dual RC building under Indonesian hazard-consistent ground motions. Results show that interstory LRB isolation elongates the fundamental period from 0.91–1.51 s to 2.64–2.94 s, reduces base shear by 32–37%, decreases overturning moment by 71–78%, and lowers maximum interstory drift ratio from 1.87% to 0.52% in X and from 2.48% to 0.87% in Y. These results demonstrate that interstory LRB isolation is a promising alternative when conventional base isolation is impractical.
Seismic Performance Evaluation of Laboratory Building with Concrete Column Jacketing Based on ASCE 41-17 using Pushover Analysis Aditya Rihadatul Aisy; Josia Irwan Rastandi; Jessica Sjah
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.9704

Abstract

This study presents comprehensive seismic performance evaluation on the laboratory building structure designed using the old regulations (SNI 1726:2002 and SNI 2847:2002) and has been strengthened with concrete column jacketing through a pushover analysis procedure based on ASCE 41-17 guidelines. Based on the global performance of the structure, the structure drift have met the performance targets with a maximum drift of 1.92% for the X direction and 1.96% for the Y direction. Based on the analysis of the deformation-controlled action, the rotation values ​​that occur in the beam components have met the performance targets with a maximum rotation of 0.0066 for negative moments and 0.0073 for positive moments. While the strain that occurs in the column components have also met the performance targets with a maximum strain of 0.0032 for rebar compression strain, 0.0131 for rebar tensile strain, and 0.0024 for concrete compression strain. Then, based on the analysis of the force-controlled action, the DCR values ​​for shear and axial in the column components have met the performance targets with a maximum value for shear of 0.89 and for axial of 0.61. While the DCR values ​​for shear in the beam components partially exceed the performance targets with a maximum value of 1.29.
Pengaruh Perubahan Temperatur Terhadap Struktur Jembatan Baja Imam Nakhrowi; Josia Irwan Rastandi; Arvilla Delitriana
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