scholarly journals DESIGN OF PONDOK NONGKO BRIDGE BANYUWANGI USING BOX GIRDER

2019 ◽  
Vol 3 (1) ◽  
pp. 38
Author(s):  
Arifa An Nuur ◽  
Dewi Junita Koesoemawati ◽  
Winda Tri Wahyuningtyas
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Precast Concrete ◽  
Tidal Flow ◽  
Box Girder ◽  
Main Structure ◽  
Concrete Box Girder ◽  
Post Tension ◽  
Main Girder ◽  
O 10

Pondok Nongko bridge is a bridge that connects between Sukojati and Pondok Nongko villages in Kabat district Banyuwangi regency. This research aims to design the Pondok Nongko bridge by using a box girder as the main structure. This bridge is designed 50 m long, which consists of tidal flow in which each wide is 3,5 meters. The main structure of the Pondok Nongko bridge is redesign using precast prestressed concrete box girder, while the selected prestress method is the post-tension method. The basic planning refers to the SNI T-12-2004 and the calculation of load based on SNI 1725-2016. According to the calculation result, it is known the main girder is using precast concrete box girder as high as 2,5 m with 2,5 m span using four cable type 5-4 super wire strands of ASTM-A-416-06 grade 270. The pedestrian barrier consists of two pipes using circular hollow sections profile Ø 139,8 mm BJ-37, WF 200.200.8.12 steel column with 500 height, and reinforced concrete parapet with 25 cm thickness and 50 cm height. The landing plate uses steel with a size of 10x10x1 cm using bolt 8 Ø 10 mm. Protostar slab uses reinforced concrete with 25 cm thickness. The total loss of prestressing is 15,439 %. Therefore, this bridge has 53,585 mm ↓ deflection. Jembatan Pondok Nongko adalah jembatan penghubung Desa Sukojati dan Desa Pondok Nongko yang berada di Kecamatan Kabat, Kabupaten Banyuwangi. Jembatan Pondok Nongko ini akan direncanakan dengan bentang 50 meter yang terdiri dari 2 lajur 2 arah dengan lebar lajur per arahnya 3,5 meter. Struktur atas Jembatan Pondok Nongko akan direncanakan menggunakan box girder pracetak beton pratekan sementara metode prategang menggunakan metode pascatarik (post-tension method). Dasar-dasar perencanaan yang digunakan mengacu pada peraturan perencanaan struktur beton untuk jembatan SNI T-12- 2004 dan pembebanan jembatan SNI 1725-2016. Berdasarkan perencanaan yang telah dilakukan, diperoleh gelagar utama yang digunakan adalah precast concrete box girder setinggi 2,5 m dengan panjang span 2,5 m dan menggunakan 4 tendon jenis 5-43 wire super strands ASTM-A-416-06 grade 270. Sandaran terdri dari dua buah pipa sandaran menggunakan profil circular hollow sections Ø 139,8 mm BJ 37, tiang sandaran mengunakan profil baja WF 200.200.8.12 setinggi 50 cm dan dinding sandaran menggunakan beton bertulang dengan tebal 25 cm setinggi 50 cm. Plat landas direncanakan menggunakan plat baja dengan ukuran 10x10x1 cm dengan menggunakan 8 baut Ø 10 mm. Trotoar menggunakan beton bertulang dengan tebal 25cm. Kehilangan prategang yang terjadi adalah 15,239 %. Sementara, lendutan total yang terjadi 53,535 mm ↓.

scholarly journals Load Distribution In Adjacent Precast "Deck Free" Concrete Box-Girder Bridges

2021 ◽  
Author(s):  
Waqar Khan
Keyword(s):  
Prestressed Concrete ◽  
Precast Concrete ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge ◽  
The Moment

Bridges built with adjacent precast, prestressed concrete box-girders are a popular and economical solution for short-span bridges because they can be constructed rapidly. The top flanges of the precast box girders form the bridge deck surface. A shear key is introduced between the adjacent boxes over the depth of the top flange (i.e. 225 mm thick as the thickness of the box's top flange). Canadian Highway Bridge Design Code, CHBDC specifies empirical equations for the moment and shear distribution factors for selected bridge configurations but not for adjacent precast concrete box-girder bridge type. In this study, a parametric study was conducted, using the 3D finite-element modeling, and a set of simplified equations for the moment, shear and deflection distribution factors for the studied bridge configuration was developed.

Effect of Pier Vertical Deformations on Deflections of Main Girders for High Pier and Long-Span Continuous Rigid-Frame Bridges

2010 ◽  
Vol 163-167 ◽  
pp. 1436-1439
Author(s):  
Jin Sheng Du ◽  
Hai Bin Liu
Keyword(s):  
Prestressed Concrete ◽  
Short Term ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Long Span ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Main Girder

In some long-span prestressed concrete box girder bridges, excessive deflections of main girders are often observed. These unacceptable deflections have detrimental influence on the serviceability and safety of the structures. To better understand and estimate short term and long term deflections for prestressed concrete box girder bridges, pier vertical deformation and its effect on deflections of main girders of Jinghe Bridg is investigated in this paper. Piers in Jinghe Bridge are tall and the difference in height between piers up to 22 m. Analysis indicates that although the short term deformations of piers are small, the long term deformations of piers can be 3 times as large as that of short-term ones. The maximum short-term downward deflection of Jinghe Bridge caused by pier deformation for main girders is 7.7 mm and the maximum long-term downward deflection is 33.3 mm. These values are relatively small compared with the span length of the bridge. But when the deflection of the main girder itself is also included, the final total deflection of the main girder may exceed the design code limit.

scholarly journals ANALISA STRUKTUR BOX GIRDER JALAN LAYANG KERETA API KUALANAMU

2018 ◽  
Vol 9 (2) ◽  
Author(s):  
Kamaluddin Lubis ◽  
Muhammad Ridwan
Keyword(s):  
Prestressed Concrete ◽  
Precast Concrete ◽  
Construction Technology ◽  
Infrastructure Development ◽  
Box Girder ◽  
Prestressing Force ◽  
Concrete Box Girder ◽  
Steel Cables ◽  
The City

The development of prestressed concrete is growing rapidly as the widespread construction technology. The use of prestressed concrete supports infrastructure development in Indonesia , especially Kualanamu Railway overpass in the city of Medan that use Box Girder with sectional height 2400 mm as a structural component . The case study of prestressed concrete box girder Railway flyover with spans of 40 meters Kualanamu explain sectional effectiveness girders whereare internaltendons filled in strand steel cables. 12.7 mm totaling 60 pieces. Further analyzing the percentage loss of prestressing force that occurs in the tendon due to the shortening of the elastic, friction on the tendon , creep , shrinkage of the concrete and so on. Additionally introduced step by step production process prestressed concrete box girder ranging from reinforcement to casting in the precast concrete plant.Keywords: Prestressed concrete , box girder, loss of prestressed

scholarly journals Load Distribution In Adjacent Precast "Deck Free" Concrete Box-Girder Bridges

2021 ◽  
Author(s):  
Waqar Khan
Keyword(s):  
Prestressed Concrete ◽  
Precast Concrete ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge ◽  
The Moment

Bridges built with adjacent precast, prestressed concrete box-girders are a popular and economical solution for short-span bridges because they can be constructed rapidly. The top flanges of the precast box girders form the bridge deck surface. A shear key is introduced between the adjacent boxes over the depth of the top flange (i.e. 225 mm thick as the thickness of the box's top flange). Canadian Highway Bridge Design Code, CHBDC specifies empirical equations for the moment and shear distribution factors for selected bridge configurations but not for adjacent precast concrete box-girder bridge type. In this study, a parametric study was conducted, using the 3D finite-element modeling, and a set of simplified equations for the moment, shear and deflection distribution factors for the studied bridge configuration was developed.

Optimization on Closure Scheme of Multi-Span Prestressed Concrete Box-Girder Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 2369-2375 ◽  
Author(s):  
Ming Yuan ◽  
Dong Huang Yan
Keyword(s):  
Stress State ◽  
Prestressed Concrete ◽  
Box Girder ◽  
Rigid Frame ◽  
Closure Scheme ◽  
Concrete Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Cantilever Construction ◽  
Rigid Frame Bridge

The stress state of finished bridge and service stage is influenced by various closure schemes in cantilever construction of multi-span prestressed concrete box-girder bridge. Two typical bridges—multi-span prestressed concrete continuous rigid frame bridge and girder bridge are investigated, The stress state in different closure schemes are analyzed using finite element(FE) analysis. Meanwhile, compared the healthy monitoring data, it has been found that taking the closure sequence from side span to middle span in cantilever construction of multi-span prestressed concrete box-girder bridge can lower stress of girder and pier in finished bridge stage, as well as reducing deformation of girder in service stage. Hence, the closure sequence from side span to middle span is more suitable for cantilever construction of multi-span prestressed concrete box-girder bridge.

A materially nonlinear finite element model for the analysis of curved reinforced concrete box-girder bridges

1993 ◽  
Vol 20 (5) ◽  
pp. 754-759 ◽  
Author(s):  
S. F. Ng ◽  
M. S. Cheung ◽  
J. Q. Zhao
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Element Model ◽  
Nonlinear Material ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges

A layered finite element model with material nonlinearity is developed to trace the nonlinear response of horizontally curved reinforced concrete box-girder bridges. Concrete is treated as an orthotropic nonlinear material and reinforcement is modeled as an elastoplastic strain-hardening material. Due to the fact that the flanges and webs of the structure are much different both in configuration and in the state of stresses, two types of facet shell elements, namely, the triangular generalized conforming element and the rectangular nonconforming element, are adopted to model them separately. A numerical example of a multi-cell box-girder bridge is given and the results are compared favourably with the experimental results previously obtained. Key words: finite element method, curved box-girder bridges, reinforced concrete, nonlinear analysis.

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