Hasil Pencarian  ::  Simpan CSV :: Kembali

"In this study connection between cable and pylon in a cable stayed bridge was experimentallyinvestigated A structural model of cable stayed bridge was manufactured where connection betweencable and pylon was pulley, sliding or hinged type. Pulley connection is a connection which is able torotate without any function between cable and pylon. To obtain longitudinal stifness and dynamiccharacteristics (such as fundamental natural frequency and damping ratio), static load test and freevibration test were carried out. Dynamic responses of bridge structure were obtained Font harmonicforced vibration test. Using a shaking table, excitation in the longitudinal direction was applied to thatmodel. Then longitudinal deflection at the top of pylon was measured Results of the model test shownthat the pylon with hinged connection Ls more rigid and its deflection could be minimal but has lowdamping ratio. While sliding type connection is more flexible but has high damping ratio. Damping ratiowas strongly influence by functions occurred in the bridge."

"Dalam Tesis ini disampaikan hasil kajian uji model struktur jembatan Cable Stayed dengan berbagai bentuk ikatan antara kabel dengan pylon, terhadap pengaruh beban lateral dalam arah memanj ang jembatan dan beban gravitasi. Kajian ini dilaksanakan dalam rangka untuk mengetahui pengaruh jenis hubungan antara kabel dengan Pylon terhadap kineija jembatan Cable Stayed dalam merespon berbagai rnacam beban yang bekeija padanya.Untuk mencapai tujuan tersebut diatas telah dilakukan kajian secara aktual melalui uji model dan kajian teoritis. Kajian aktual dilakukan dengan membuat model jembatan Cable Stayed yang hubungan antara pylon dengan kabelnya berupa hubungan putar, geser dan sendi, lalu mengujinya dengan memberikan beban statis vertikal pada girder dan beban statis horizontal arah memanjang jembatan serta memberikan getaran lateral arah memanjang jembatan dengan menggunakan meja getar. Sedangkan kajian secara teoritis dilakukan dengan cara menganalisa struktur model jembatan dengan memberikan gaya-gaya yang seperti gaya yang diberikan pada seat uji model, yaitu gaya statis vertical, gaya statis horizontal dan getaran arah memanjang jembatan. Untuk analisa teoritis ini dipergunakan program SAP 2000 versi 8. Untuk mendukung kehandalan hasil uji model, maka sebelum nya telah dilakukan uji-uji pendukung seperti: uji kekuatan tarik kabel, uji Kekakuan struktur dan uji rasio redaman.Setelah dilakukan pengujian, hasilnya menunjukkan hahwa hasil uji model memberikan nilai yang mendekati dengan hasil analisa secara teoritis, sehingga dapat dinyatakan bahwa hasil uji model struktur cukup handal dan dapat dipakai sebagai dasar analisa untuk pengambilan keputusan.Dari hasil analisis uji model dapat disimpulkan bahwa: Struktur dengan ikatan sendi memiliki respon Pylon yang terbaik dibandingkan dengan yang lain dalam merespon beban gempa yang dimodelkan sebagai beban getaran dan beban statis arah memanjang jembatan. Struktur dengan ikatan putar memiliki respon Deck dan Pylon yang terbaik terhadap beban lalu lintas yang dimodelkan sebagai beban statis arah vertikal yang bekexja pada girder jembatan. lkatan yang memberikan fleksibilitas pylon paling baik terhadap beban hidup vertikal dan beban horizontal arah rnemanjang baik oleh getaran maupun oleh gaya statis adalah ikatan Geser.

---

ThisThesis presents a result of experimental model of a Cable Stayed bridge with various connections between cable and pylon, subject to lateral load and gravity load. This research is conducted in order to investigate the influence of this cable connection on the performance of that bridge.To achieve this objective, a study has been carried out using experimental model as well as theoretical analysis. The experimental research was held by constructing the cable stayed bridge model where the connection of the cable and pylon is hinge connection, roll connection and rotate connection, then that model was subjected to the vertical static load on its deck, the static horizontal load along the bridge and lateral vibration in longitudinal direction generated by Shaking table. The theoretical analysis and experimental model resulted relatively the same forces. The theocratical analysis was performed by using SAP 2000 version 8 program. To improved reliability of the experimental model, it has been carried out some tests such as; tension cable test, stiffness test, and damping test.The result, of the experimental model test showed slightly different with the theoretical analysis result, therefore they could be useful for the discussion and conclusion of the experimental work. Experimental model test resulted that the structure with hinged connection gave the best Pylon behavior under earthquake force as well as under static load in the longitudinal direction of the bridge. The structure with a rotated connection has the best Deck and Pylon response under the tab`:ic load. lt was found that the rolled connection resulted flexible responses of pylon as well as deck when the bridge under live load and horizontal static load or lateral dynamic load."

"Tesis ini membahas mengenai perhitungan pembangunan secara bertahap berdasarkan ketergantungan waktu (time dependent) jembatan cable stayed dengan studi kasus Jembatan Suramadu. Adapun hasil yang akan diperoleh pada penelitian ini yaitu mengevaluasi perilaku struktur pada saat pelaksanaan bertahap menggunakan metode kantilever seperti besarnya gaya-gaya kabel, tegangan elemen struktur, dan lendutan gelagar yang terjadi pada setiap tahapan konstruksi. Teknik analisa yang digunakan yaitu forward assemblage analysis dan backward disassemblage analysis. Dimana untuk teknik menggunakan forward assemblage analysis pelat dimodelkan sebagai non komposit dan komposit serta menggunakan standar CEB-FIP dan ACI untuk mengetahui seberapa pengaruh nilai lendutan kedua standar tersebut. Dari hasil penelitian diperoleh bahwa terjadi penurunan besaran lendutan gelagar sebesar 19 % dan gaya kabel sebesar 22 % setelah 10 hari pengecoran pelat dilakukan (sudah terjadi efek struktur komposit), dari asumsi pelat dimodelkan sebagai beban luar menjadi pemodelan struktur komposit. Dengan menggunakan standar CEB-FIP dan ACI diperoleh hasil bahwa nilai lendutan pada awal penempatan pelat (sudah terjadi struktur yang komposit) lebih kecil jika menggunakan code ACI. Hal ini disebabkan karena efek ACI pada awal terjadi struktur yang komposit memberikan nilai efek kekuatan material yang lebih besar dibandingkan dengan CEB-FIP. Sedangkan pada akhir-akhir pelaksanaan konstruksi nilai lendutan gelagar menggunakan CEB-FIP memperoleh hasil yang cenderung lebih kecil dibandingkan dengan ACI. Hasil perbandingan analisa antara forward assemblage analysis dan backward disassemblage analysis menggambarkan bahwa untuk nilai lendutan gelagar, terjadi perbedaan hasil rata-rata sebesar 3 % sedangkan untuk nilai gaya kabel terjadi variasi perbedaan antara 1 - 4 %.

---

This thesis discuss the construction calculation in stages based on the dependence of time (time dependent) cable stayed bridge, using Suramadu Bridge as a case study. Results that will be obtained in this study are to evaluate the behavior of structures during the implementation stages by using cantilever method such as the cable forces, tension structural element, and girder deflection that occurs in each stage of construction. The analysis technique that used in this thesis are the forward assemblage analysis and backward disassemblage analysis. Where the forward assemblage analysis technique modeled the plate as a non-composite and composite form by using CEB-FIP and ACI standards to determine the influence of the deflection.

The result showed that there are decreasing deflection around 19% and cable force by 22% after 10 days of casting plate done (already in composite structure), from the assumption, the plate is modeled as external loads into composite structures model. By using standard CEB-FIP and ACI showed the value of deflection in initial placement of the plate (in composite structure) is smaller when using the ACI code. This is because the effect of ACI in the early composite structure gives the material strength in a greater value than the CEB-FIP. In contrary, at the end of the construction stages, the girder deflection that using CEB-FIP gives smaller deflection compared to ACI. The comparison analysis between the forward assemblage analysis and disassemblage analysis illustrates that there was an average difference of 3 % while for the cable force variations the differences are between 1 - 4 %."

"ABSTRACTThe present study deals with the static and dynamic behavior of cable-systems and cable-stayed bridge systems. In the static analysis, linear. and geometry nonlinearities such as large-deflections and stress-stiffening are evaluated. In the dynamic analysis, only linear: analysis is taken into account, the nonlinearities are disregarded. In the cable system, there are two cable models evaluated, i.e., the horizontal cable-systems and inclined cable-systems. The cable systems are modeled as three-dimensional (3-D) structural system. The various prestressed forces in the cables are investigated, and the results show that the nonlinearity effects do not quite have an influence when the prestressed forces are between 21% - 45% fp. and 15% - 45% fpU for the horizontal cable and inclined cable-systems, respectively. The transverse (coupling effect) stiffnesses are nearly zero for the prestressed forces in the cable between 16% - 45% Cu. The dynamic characteristic of both cable-systems are quite similar, with the first mode is out-of-plane motion. The gravity acceleration does not take an important influence in the dynamic behavior of the cable-systems study herein. In the cable-stayed bridge systems, two common types of cable-stayed bridge are investigated, namely the fan-type and the harp-type cable-stayed bridge. The bridges are modeled as two-dimensional (2-D) structural system. The comparison results of axial forces in the cables, vertical displacement in the mid-point of middle span, horizontal displacement at top of pylon, bending moment in the deck, axial forces in the deck and also vertical reaction at foundation of pylon are all investigated. The results show that the nonlinearity effects with the prestressed forces in stay cable between 16% - 45% fp? seem do not have quite important influence. The natural frequencies and mode shapes for the first 20 modes are presented and the results are quite similar for the both bridge systems. The influence of dead load multiplier to the dynamic characteristic of such bridges are also evaluated and the results show that the structure buckle under 19 DL (Dead Load) and 15 DL for the fan and harp-type, respectively. These results show that bridge models studied herein are in the safe design consideration."

"[Tulisan ini membahas perilaku struktur jembatan cable stayed dengan studi kasus A Ruck Chucky Hanging Arc Bridge. Hasil yang diperoleh pada penelitian ini yaitu mengevaluasi dan membandingkan perilaku struktur pada saat konstruksi (analisa sequential) dengan analisa struktur jembatan utuh (analisa langsung). Adapun hasil yang diperoleh yaitu gaya dalam kabel pada saat konstruksi, gaya dalam gelagar, tegangan pada masing-masing elemen dan lendutan yang terjadi pada gelagar jembatan. Metode analisa yang digunakan pada saat konstruksi yaitu forward assemblage analysis. Pada saat konstruksi nilai gaya dalam dan lendutan pada gelagar akan berubah menurut tahapannya. Respon struktur juga akan berbeda pada saat konstruksi dengan analisa langsung sehingga masing-masing analisa perlu diperhatikan.

---

This article discusses the behavior of cable stayed bridge structures with case studies A Ruck Chucky Hanging Arc Bridges. The results will be obtained in this study is to evaluated and compare the behavior of structure during construction (sequential analysis) with intact structure analysis (direct analysis). As for the result to be obtained by force in the cable at the time of construction, the style of the girder, stresses and deflections which occur on the bridge girder. The analytical methods used at the time of construction is forward assemblage analysis. At the time of construction, value of the force and deflection in the girder will chance according stages constructions. The respon structure will also be different at the time of construction with direct analysis so that each analysis need to be considred.;This article discusses the behavior of cable stayed bridge structures with case studies A Ruck Chucky Hanging Arc Bridges. The results will be obtained in this study is to evaluated and compare the behavior of structure during construction (sequential analysis) with intact structure analysis (direct analysis). As for the result to be obtained by force in the cable at the time of construction, the style of the girder, stresses and deflections which occur on the bridge girder. The analytical methods used at the time of construction is forward assemblage analysis. At the time of construction, value of the force and deflection in the girder will chance according stages constructions. The respon structure will also be different at the time of construction with direct analysis so that each analysis need to be considred, This article discusses the behavior of cable stayed bridge structures with case studies A Ruck Chucky Hanging Arc Bridges. The results will be obtained in this study is to evaluated and compare the behavior of structure during construction (sequential analysis) with intact structure analysis (direct analysis). As for the result to be obtained by force in the cable at the time of construction, the style of the girder, stresses and deflections which occur on the bridge girder. The analytical methods used at the time of construction is forward assemblage analysis. At the time of construction, value of the force and deflection in the girder will chance according stages constructions. The respon structure will also be different at the time of construction with direct analysis so that each analysis need to be considred]"