Junaedi Utomo
Departemen Teknik Sipil, Universitas Atma Jaya Yogyakarta

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Analisis Riwayat Waktu Nonlinier Struktur Flat Slab dengan OpenSees Navigator Samsul A Rahman Sidik Hasibuan; Yoyong Arfiadi; Junaedi Utomo
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 1, JULI 2022
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1245.304 KB) | DOI: 10.14710/mkts.v28i1.38184

Abstract

Pengembangan sistem struktur yang tidak menggunakan balok sebagai komponen utama pertama kali diajukan oleh Turner pada tahun 1906. Sistem struktur ini lebih dikenal dengan flat slab. Struktur flat slab didukung oleh kepala kolom dan drop panel, atau tanpa drop panel, atau tanpa kepala kolom. Beberapa peraturan bangunan seperti IS 456:2000, ACI 318-19, EC 2:2004, dan NZS 3101 (Part 1):2006 hanya memberikan pedoman untuk merancang sistem flat slab di bawah beban gravitasi saja. Namun demikian, bangunan flat slab juga banyak dibangun di daerah dengan gempa tinggi yang dapat menyebabkan runtuhnya bangunan akibat beban gempa. Dalam tulisan ini struktur gedung flat slab 10 tingkat hasil rancangan dianalisis menggunakan analisis riwayat waktu respons nonlinier dengan bantuan software OpenSees Navigator menggunakan beberapa rekaman gempa yaitu Kobe (Jepang, 1995), Imperial Valley (California, 1979) dan Tabas (Iran, 1978) yang telah disesuaikan dengan spektra desain kota Yogyakarta. Dari hasil analisis menggunakan OpenSees Navigator diperoleh bahwa story drift yang terjadi masih dalam batas-batas yang disyaratkan dalam peraturan, sehingga gedung yang ditinjau masih dalam batas perencanaan life safety.
EFEKTIVITAS ANGKUR EPOKSI TERHADAP KEKANGAN EKSTERNAL BALOK BETON BERTULANG DENGAN PERKUATAN CFRP Dinar Gumilang Jati; Junaedi Utomo; Felix Adi Tanudjaja; Han Ay Lie
Jurnal Teknik Sipil Vol. 17 No. 2 (2023)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v17i2.7021

Abstract

Externally Bonded Carbon Fiber Reinforced Polymer (EB-CFRP) with U-wrap is one of the alternative external strengthening of modern reinforced concrete beams, which has been proven effective in significantly increasing flexural and deformation capacities. Although quite effective in increasing the structural capacity, external reinforcement needs to be studied further about its failure behavior, the avoided failure is called debonding, an interface bond failure between the FRP composite material and the concrete material. Epoxy has a fairly high material resistance, but its use as a reinforcing composite bonding material needs further investigation. Adding epoxy anchors at the ends of CFRP can mobilize the tensile strength in CFRP, eliminating or delaying debonding failure. Epoxy anchors (epoxy-filled grooves) are expected to be effective and flexible for application to various forms of components of reinforced concrete structures that have been reinforced with EB-CFRP. Currently, there are no standards and guidelines for applying FRP anchors. However, research has been conducted on the failure pattern of FRP anchors with U-style wrapping which can avoid debonding so that failure with FRP rupture can be achieved. This study examines the effectiveness of epoxy anchorage in improving the external strengthening of reinforced concrete beams with EB-CFRP reinforcement. The behavior of epoxy anchors in reinforced concrete beams with EB-CFRP will be investigated through experimental tests.