Sumantri, Devie Arisandy
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EVALUASI NILAI SISA KAPASITAS JEMBATAN VOIDED SLAB WAY BAKO I BERDASARKAN PERATURAN PEMBEBANAN SNI 1725-2016 dan PPJJR No. 12/1970 Sumantri, Devie Arisandy; Helmi, Masdar; Isneini, Mohd
REKAYASA: Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol. 25 No. 1 (2021)
Publisher : Jurusan Teknik Sipil Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/rekrjits.v25i1.5

Abstract

Jembatan dapat mengalami kegagalan struktur karena berbagai macam faktor eksternal. Keadaan Jembatan Way Bako I yang mengalami lendutan cukup besar saat kendaraan melintas dan permukaan aspal yang selalu rusak mengindikasikan adanya potensi kegagalan struktur jembatan. Mengingat kegagalan struktur ini berbahaya bagi penggunanya, maka diperlukan langkah evaluasi sehingga  dapat diketahui nilai sisa kapasitas jembatan dan dihindari kegagalan strukturnya. Evaluasi pada Jembatan ini menggunakan metode rating factor (RF) mengacu kepada Pedoman Penentuan Nilai Sisa Kapasitas jembatan dari Dirjen Bina Marga dengan melakukan analisis terhadap kondisi harian (inventory)  dan kondisi  khusus  (operating). Berdasarkan pengamatan lapangan dan perhitungan data penelitian, Jembatan Way Bako I mengalami kerusakan non struktur maupun struktur. Berdasarkan analisis RF menurut SNI 1725-2016 dan PPJJR No. 12/1970 didapat hasil bahwa kapasitas momen pada inventory rating factor dan operating rating factor tidak aman karena memiliki nilai RF < 1. Sedangkan kapasitas geser pada inventory rating factor dan operating rating factor aman karena memiliki nilai RF > 1. Dengan demikian maka Jembatan Way Bako I memerlukan perbaikan struktur.
Evaluasi Perencanaan Jembatan Beton Bertulang Balok T dengan Variasi Mutu Antara K-200 – K-300 Sumantri, Devie Arisandy; Bayzoni, Bayzoni; Sebayang, Surya
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 5 No. 1 (2017): Edisi Maret 2017
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v5i1.610

Abstract

Design of reinforced concrete T beams bridge with variation concrete strength is conducted to determine design of a bridge which can be built in remote area with a minimum concrete quality but still in accordance with the applicable safety standards. The bridge has a span of 15 m, a width of traffic lanes 2 x 5.5 m with variations concrete strength of K-200, K-225, K-250, K-275 and K-300. The calculations that have been done show that in cross section 2-2 , cross section 3-3 and cross section 4-4, the lower concrete strength will obtains more flexural girder reinforcement needs. However at cross section 1-1 the amount of reinforcement on every concrete strength has the same amount of reinforcement because the reinforcement ratio is the ratio of minimum reinforcement. Shear reinforcement of girder using the same diameter will produce the reinforcement needs with larger spacing while concrete strength increased. Maximum girder deflection that occurs will be smaller if the concrete strength increases. However, if the amount of reinforcement in the quality of K-200 more larger then the value deflection will be smaller compared with the quality of K-300. The lower quality of flexural strength concrete slab with the D16 will get smaller reinforcement spacing.Key word : bridge, T beams, quality variation, Upper structure