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PENGARUH LANTAI KOMPOSIT TERHADAP KINERJA RANGKA BAJA PRATEKAN
Get PDFAbstrak
Makalah ini memaparkan hasil penelitian tentang kajian rangka pratekan komposit untuk jembatan rangka baja dengan lantai jembatan diatas. Pemberian gaya pratekan pada rangka dilakukan dengan pemasangan Tendon / kabel prestress pada bagian bawah rangka, yang dihubungkan dengan angkur yang terpasang pada plat simpul bagian atas ujung rangka. Aksi komposit dari struktur ini didapatkan dengan menghubungkan lantai yang terbuat dari beton bertulang dengan bagian atas rangka menggunakan baut yang difungsikan sebagai shear connector. Untuk mengetahui daya layan struktur rangka pratekan komposit ini, dilakukan pengujian pembebanan terhadap struktur sebelum dipasang shear connector dan struktur setelah dipasang shear connector. Pengujian pembebanan dilakukan dengan alat yang disebut Mechanical digital loading test. Dari hasil penelitian menunjukkan bahwa aksi komposit pada rangka pratekan memberikan tambahan daya layan sebesar 71% lebih besar daripada struktur rangka pratekan yang lantainya tidak dipasang shear connector.
Kata Kunci: Tendon, prestress, Angkur, komposit, shear connector
STUDI KASUS KERUSAKAN JEMBATAN DAN PENGARUNYA TERHADAP SISA UMUR JEMBATAN
Get PDFABSTRACT
This paper presents the results of research case studies of bridge damage and influence on the remaining life of the bridge. This research takes the case of the highway bridge between Kebon Jeruk – Penjaringan west of Jakarta. The purpose of this activity is to get an idea of the residual life of the bridge that is related to the presence of defects in the structure of the bridge. To determine the actual condition of the bridge, performed data collection by measuring the compressive strength of concrete, crack depth, crack width, thick concrete cover, reinforcement diameter, reinforcement spacing, deflection due to load and run. From these data made feasibility and serviceability analysis to determine the value of the bridge.condition. Furthermore value condition used to predict the residual life of the bridge. The results of the residual life analysis showed that highway bridge on 1 segment , who suffered damage to the value of the condition 2.67, residual life if the damage continue only 1.07 years, and if the damage does not continue, the remaining life of 11.67 years. For segment 3 which suffered minor damage with the value of condition 2, residual life if the damage continues only 2,125 years, and if the damage does not continue the residual life of 18.89 years.
Keywords: bridge, Pile Slab, Value condition, feasibility, serviceability, remaining life.
ABSTRAK
Makalah ini memaparkan hasil penelitian studi kasus kerusakan jembatan dan pengaruhnya terhadap sisa umur jembatan. Penelitian ini mengambil kasus pada jembatan jalan tol ruas Kebon Jeruk- Penjaringan Jakarta barat. Tujuan dari kegiatan ini untuk mendapatkan gambaran sisa umur jembatan yang kaitannya dengan adanya kerusakan pada struktur jembatan. Untuk mengetahui kondisi actual jembatan di dilapangan, dilakukan pengumpulan data dengan pengukuran kuat tekan beton, kedalaman retak, lebar retak, tebal selimut beton, diameter tulangan, jarak tulangan, dan lendutan akibat beban berjalan. Dari data tersebut dibuat analisa kelayakan dan kelayanan untuk menentukan nilai kondisi jembatan. Yang selanjutnya nilai kondisi digunakan untuk memprediksi umur sisa jembatan. Hasil analisa sisa umur menujukkan bahwa jembatan jalan tol pada ruas 1, yang mengalami kerusakan dengan nilai kondisi 2,67, sisa umur jika kerusakan berlanjut hanya 1,07 tahun, dan jika kerusakan tidak berlanjut, umur sisanya 11,67 tahun. Untuk ruas 3 yang mengalami rusak ringan dengan nilai kondisi 2, umur sisa jika kerusakan berlanjut hanya 2,125 tahun, dan jika kerusakan tidak berlanjut umur sisanya 18,89 tahun.
Kata Kunci: Jembatan, Pile Slab, Nilai kondisi,Kelayakan, Kelayanan , Sisa umur
STUDI KASUS KERUSAKAN JEMBATAN DAN PENGARUNYA TERHADAP SISA UMUR JEMBATAN
Get PDFABSTRACT
This paper presents the results of research case studies of bridge damage and influence on the remaining life of the bridge. This research takes the case of the highway bridge between Kebon Jeruk – Penjaringan west of Jakarta. The purpose of this activity is to get an idea of the residual life of the bridge that is related to the presence of defects in the structure of the bridge. To determine the actual condition of the bridge, performed data collection by measuring the compressive strength of concrete, crack depth, crack width, thick concrete cover, reinforcement diameter, reinforcement spacing, deflection due to load and run. From these data made feasibility and serviceability analysis to determine the value of the bridge.condition. Furthermore value condition used to predict the residual life of the bridge. The results of the residual life analysis showed that highway bridge on 1 segment , who suffered damage to the value of the condition 2.67, residual life if the damage continue only 1.07 years, and if the damage does not continue, the remaining life of 11.67 years. For segment 3 which suffered minor damage with the value of condition 2, residual life if the damage continues only 2,125 years, and if the damage does not continue the residual life of 18.89 years.
Keywords: bridge, Pile Slab, Value condition, feasibility, serviceability, remaining life.
ABSTRAK
Makalah ini memaparkan hasil penelitian studi kasus kerusakan jembatan dan pengaruhnya terhadap sisa umur jembatan. Penelitian ini mengambil kasus pada jembatan jalan tol ruas Kebon Jeruk- Penjaringan Jakarta barat. Tujuan dari kegiatan ini untuk mendapatkan gambaran sisa umur jembatan yang kaitannya dengan adanya kerusakan pada struktur jembatan. Untuk mengetahui kondisi actual jembatan di dilapangan, dilakukan pengumpulan data dengan pengukuran kuat tekan beton, kedalaman retak, lebar retak, tebal selimut beton, diameter tulangan, jarak tulangan, dan lendutan akibat beban berjalan. Dari data tersebut dibuat analisa kelayakan dan kelayanan untuk menentukan nilai kondisi jembatan. Yang selanjutnya nilai kondisi digunakan untuk memprediksi umur sisa jembatan. Hasil analisa sisa umur menujukkan bahwa jembatan jalan tol pada ruas 1, yang mengalami kerusakan dengan nilai kondisi 2,67, sisa umur jika kerusakan berlanjut hanya 1,07 tahun, dan jika kerusakan tidak berlanjut, umur sisanya 11,67 tahun. Untuk ruas 3 yang mengalami rusak ringan dengan nilai kondisi 2, umur sisa jika kerusakan berlanjut hanya 2,125 tahun, dan jika kerusakan tidak berlanjut umur sisanya 18,89 tahun.
Kata Kunci: Jembatan, Pile Slab, Nilai kondisi,Kelayakan, Kelayanan , Sisa umur
PENGARUH LANTAI KOMPOSIT TERHADAP KINERJA RANGKA BAJA PRATEKAN
Get PDFAbstrak
Makalah ini memaparkan hasil penelitian tentang kajian rangka pratekan komposit untuk jembatan rangka baja dengan lantai jembatan diatas. Pemberian gaya pratekan pada rangka dilakukan dengan pemasangan Tendon / kabel prestress pada bagian bawah rangka, yang dihubungkan dengan angkur yang terpasang pada plat simpul bagian atas ujung rangka. Aksi komposit dari struktur ini didapatkan dengan menghubungkan lantai yang terbuat dari beton bertulang dengan bagian atas rangka menggunakan baut yang difungsikan sebagai shear connector. Untuk mengetahui daya layan struktur rangka pratekan komposit ini, dilakukan pengujian pembebanan terhadap struktur sebelum dipasang shear connector dan struktur setelah dipasang shear connector. Pengujian pembebanan dilakukan dengan alat yang disebut Mechanical digital loading test. Dari hasil penelitian menunjukkan bahwa aksi komposit pada rangka pratekan memberikan tambahan daya layan sebesar 71% lebih besar daripada struktur rangka pratekan yang lantainya tidak dipasang shear connector.
Kata Kunci: Tendon, prestress, Angkur, komposit, shear connector
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
EVALUASI KINERJA STRUKTUR JEMBATAN INTEGRAL DARI PERUBAHAN STRUKTUR JEMBATAN PARSIAL
Get PDFThe Serpong-Balaraja Section 1A toll road construction project's Foresta bridge structure had a modification in span length from 40 meters to 41,386 meters without changing the girder's specifications. The structural system switches from partial bridges to integrated beams to reduce the number of field moments caused by span changes. With the change in the structural system, it is necessary to evaluate the performance of the bridge structure with an integral system by checking the cross-sectional capacity, comparing the negative moment resisting reinforcement from the analysis with the existing conditions, and determining the reinforcement that can be used if the integral bridge is inadequate. With the help of software, evaluation is carried out by checking the ability of the cross section to withstand moments and checking its deflection and shear forces. Based on the results of the analysis, the moment capacity of the middle section is 18198.38 kN.m., and the moment of the load capacity is 7829.824 kN.m. This indicates that the middle capacity has been in service. With a load moment capacity of 11335.04 kNm and an end cross-sectional capacity of 9401.26 kN.m, the performance of the cross section is not serviceable. In addition, the bridge deflection meets the allowable deflection limit of 51.73 mm after the bridge is integrated because previously the partial bridge deflection was 79.83 mm, and after being integrated, it became 23.28 m. Furthermore, the shear forces of the partial bridge (1599,162 kN) and the integral bridge (1585,009 kN) are less than the maximum shear force that can be carried, which is 6934,12 kN. Based on the analysis results, D32-100 negative moment resisting reinforcement is needed, while the existing condition reinforcement uses D32-150. This indicates that the structure requires reinforcement. Fiber-reinforced polymer (FRP) was chosen as reinforcement in reference to 022/BM/2011 because it is superior in several ways
STUDI KASUS KERUSAKAN JEMBATAN DAN PENGARUHNYA TERHADAP SISA UMUR JEMBATAN
Get PDFThis paper presents the results of research case studies of bridge damage and influence on the remaining life of the bridge. This research takes the case of the highway bridge between kebon jeruk – penjaringan west of jakarta. The purpose of this activity is to get an idea of the residual life of the bridge that is related to the presence of defects in the structure of the bridge. To determine the actual condition of the bridge, performed data collection by measuring the compressive strength of concrete, crack depth, crack width, thick concrete cover, reinforcement diameter, reinforcement spacing, deflection due to load and run. From these data made feasibility and serviceability analysis to determine the value of the bridge.condition. Furthermore value condition used to predict the residual life of the bridge. The results of the residual life analysis showed that highway bridge on 1 segment , who suffered damage to the value of the condition 2.67, residual life if the damage continue only 1.07 years, and if the damage does not continue, the remaining life of 11.67 years. For segment 3 which suffered minor damage with the value of condition 2, residual life if the damage continues only 2,125 years, and if the damage does not continue the residual life of 18.89 years.
Keywords: bridge, pile slab, value condition, feasibility, serviceability, remaining life
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