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Kusumastuti, Dyah
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EFFECT OF USING LEAD RUBBER BEARING ON A STEEL ARCH BRIDGE Kusumastuti, Dyah; Lim, E -; Asneindra, M; Mulyadi, Sandy
Jurnal Teknik Sipil Vol 22, No 1 (2022): JURNAL TEKNIK SIPIL EDISI JUNI 2022
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v22i1.54494

Abstract

A study was conducted to evaluate the application of Lead Rubber Bearing (LRB) on bridge structures. The length of steel arch bridge is 80 m, width of 10 m, and height of 19.6 m. The bridge is simply supported with two bearings on each support. Structural analysis reveals that the lateral force on the bearing is more than 400 tons (835 tons in longitudinal direction). The original designer"™s intention is to use pot bearings. However, the pot bearing was required to undergo some mechanical test to verify its properties prior to installation. Due to its size, this scheme is not applicable due to the limitations of the testing facility. Therefore, an alternative design was evaluated using LRB to reduce the reaction force, hence downsize the bearing size. The LRB used is of LRB 7500 characteristics, and the calculation refers to AASHTO Guide Specifications for Seismic Isolation Design (GSID), 4th edition 2014.The analysis shows that applying LRB on the bridge lengthened the structural period from 0.76 seconds to 1.67 seconds. It also increased the damping ratio from 5% to 43 %. With these significant changes in structural parameters, lateral forces due to earthquake loads on the bearing and foundation can be greatly reduced. The study found that replacing pot bearings with LRBs can reduce the lateral force to 80 tons, approximately one fifth from the previous design. Correspondingly, the internal forces of some major structural components of the bridge can be reduced due to the application of LRB.
Kajian Kelayakan Seismik dan Penyusunan Sambungan Tipikal Bolted Flange Plate Pada Sistem SRPMK Menggunakan Profil Baja Indonesia Kusumastuti, Dyah; Tenderan, Randy; Mahib, Naufal Yusviansyah; Jayusman, Andi Alfian
Jurnal Teknik Sipil Vol 32 No 3 (2025): Jurnal Teknik Sipil - Edisi Desember
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2025.32.3.6

Abstract

Abstrak Indonesia merupakan negara dengan tingkat aktivitas seismik tinggi, sehingga perancangan struktur baja tahan gempa menjadi sangat penting. SNI 7860:2020 dan SNI 7972:2020 menetapkan bahwa sambungan balok-kolom dalam Sistem Rangka Pemikul Momen Khusus (SRPMK) harus menggunakan sambungan terprakualifikasi atau diuji untuk memastikan kekakuan dan kapasitas rotasinya. Penelitian ini bertujuan untuk mengkaji kesesuaian profil baja berdasarkan SNI 9150 terhadap perencanaan sambungan Bolted Flange Plate (BFP), salah satu tipe sambungan terprakualifikasi. Studi dilakukan dengan menganalisis berbagai kombinasi profil balok dan kolom berdasarkan persyaratan seismik berupa ketentuan geometri, kapasitas momen plastis, dan rasio strong column-weak beam (SCWB). Hasil evaluasi menunjukkan bahwa profil yang memenuhi seluruh persyaratan terbatas, dengan kendala utama teridentifikasi pada kelangsingan kolom yang mengurangi kapasitas momen plastis. Temuan ini menegaskan perlunya strategi pemilihan profil baja yang lebih selektif serta potensi pengembangan kebijakan produksi baja untuk mendukung penerapan sambungan terprakualifikasi di Indonesia. Kata-kata Kunci : Struktur baja, Sistem Rangka Pemikul Momen Khusus (SRPMK), sambungan momen balok-kolom, Bolted Flange Plate (BFP), persyaratan seismik
Kajian Eksperimental Perilaku Dinding Bata Terkekang Berplester akibat Beban Siklik Kusumastuti, Dyah; Apriani, Indriana; Suarjana, Made
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 2, DESEMBER 2025 (IN PROGRESS)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i2.74887

Abstract

Confined masonry walls are commonly found in non-engineered housings in Indonesia. To better understand their behavior and to find improvement to the current practice, experimental studies have been conducted using full-scale (3m × 3m) wall specimens, which represent simple housing wall panels. In this research, the performance of plastered confined masonry walls in resisting lateral loads was studied experimentally. Three wall specimens were constructed following general construction practice in Indonesia. All specimens were plastered on both sides. Model 1 was constructed without continuous anchorage, Model 2 with two continuous anchorages with 1m spacing, and Model 3 with two continuous anchorages with 0.5m spacing. The specimens were subjected to cyclic in-plane lateral loads. The parameters evaluated were damage pattern and failure mechanism, load capacity, stiffness, ductility, and energy dissipation. The study revealed that adding plaster improved the wall’s lateral capacity. The continuous anchorage shows less significant improvement on plastered walls compared to non-plastered walls, but still increased stiffness, ductility, and energy dissipation. The study verifies that having plaster and continuous anchorage improve structural performance while delaying damage. Analytical study reveals that all models have adequate capacity to resist the design seismic load based on the current code.
Pengaruh Detailing Tulangan Portal Pengekang pada Pemodelan Numerik Dinding Bata Terkekang Akibat Pembebanan Monotonik Aryadenata, Dimas; Suarjana, Made; Kusumastuti, Dyah; Lim, Erwin
Jurnal Teknik Sipil Vol 22 No 1 (2026): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v22i1.11155

Abstract

Confined masonry walls are commonly found in low-rise buildings in Indonesia, which are typically constructed without structural analysis. Even in structural analysis, the contribution of masonry walls to the strength and stiffness of the structure is often disregarded. This study focuses on the numerical modelling development of confined masonry walls due to the influence of the absence of frame reinforcement detailing under monotonic loading using an equivalent diagonal strut model. The modeling was carried out by comparing specimens with and without reinforcement detailing of the confining frame, which is commonly found in Indonesia. The results show that the numerical model can effectively simulate the response of confined masonry walls. However, a significant error difference between the two tested specimens indicates the limitations of the model in capturing the beam-column joint failure phenomenon before the masonry wall failure in specimens without confining frame detailing.
Co-Authors Ade Geovania Azwar Ahmad Munandar Ahmad Zakaria Anisa, Siti Nur Apriani, Indriana Argoanto, Yoesoep Aryadenata, Dimas Asnar, Etty Sofia Mariati Asneindra, M Chevie Wirawan Dematria Pringgabayu Djoko Pitoyo Dwi Jokowinarno Fauzi Akbar, Fauzi Firdarini, Khoirunnisa Cahya Friday Fitricia Nur Hartantio, Fajar Hartono Bagio, Toni Herlien D. Setio, Herlien D. Inayati Nasrudin Indra Saputra Indra Saputra Irgi Biantara Jayusman, Andi Alfian Lim, E - Lim, Erwin Lina Nurhayati Lutfi Istikharoh Made Suarjana Made Suarjana Mahib, Naufal Yusviansyah Masruroh, Yulfah Muhammad Sayuti Mulyadi, Sandy mulyani, sri rochani Munthe, Dinda Murni Astuti Muslinang Moestopo Muslinang Moestopo Novi Mardiana Novi Mardiana Nurbani, Sofiani Nalwin Nurwathi, Nurwathi Prima Sukma Yuana riswanto riswanto Sarno Sarno Sartika, Nova Setia Sayuti, Muhammad setiowati setiowati Setyorini, Budi Sofiani Nalwin Nurbani Subkhan, Muhammad Sukma Yuana , Prima Teknik Sipil, Jurnal Tenderan, Randy Wicaksana, Joan Kurniawan Wisnu Wijaya Yuana, Prima Sukma Zirads, Bob