SEISMIC BEHAVIOR OF SUPER LONG MULTI-SPAN SUSPENSION BRIDGE WITH CENTER SPAN LENGTH OF 3000M

Author(s):  
Shingo IWASHITA ◽  
Hitoshi NAKAMURA ◽  
Kuniei NOGAMI ◽  
Yusuke KISHI ◽  
Kazuya MAGOSHI ◽  
...  
2006 ◽  
Vol 2 (1) ◽  
pp. 29
Author(s):  
Ahmed Gasim ◽  
Haitham A.A.Elboushi

In this research factors affecting the non-linearity of suspension bridges were studied. The fundamental parameters studied are the main and side span lengths, cable sag, tower height, cable x-section and the flexural rigidity of the stiffening girder .The effect of variation of each parameter on the cable tension and the girder moments is studied. A non-linear 2-dimensional mathematical model of a 3 span, continuous suspension bridge is considered . The solution is based on the second order deflection theory given in a computerized form. It has been found that the degree of effect of these parameters on the results of analysis in a descending order is: the main span length, side span length, cable sag, cable section and the stiffness of the bridge girder.


2018 ◽  
Vol 4 (4) ◽  
pp. 66
Author(s):  
Infira Kamiliana Firdausi ◽  
Bernardinus Herbudiman ◽  
Gatot Sukmara

ABSTRAKStruktur kabel pada jembatan suspension berperan sebagai pemikul utama beban pada jembatan. Perbedaan jenis kabel akan memengaruhi nilai defleksi, tegangan kabel, dan tegangan pada gelagar. Berdasarkan kondisi tersebut, maka dilakukan studi evaluasi terhadap nilai defleksi jembatan berdasarkan variasi jenis kabel dan variasi panjang bentang. Jenis kabel yang digunakan adalah IWRC 6×36, Spiral Strand Rope, dan Locked-coil Rope dengan bentang 80 meter, 160 meter, dan 200 meter. Sistem pembebanan pada model struktur mengacu pada Surat Edaran Menteri Pekerjaan Umum No.02/SE/M/2010. Analisis struktur menggunakan program aplikasi SAP2000 versi 14. Hasil analisis menunjukkan bahwa pada bentang ≤ 80 meter tidak ada perbedaan yang signifikan antara ketiga jenis kabel. Pada bentang 80 meter hingga 160 meter jenis kabel Spiral Strand dan Locked-coil mampu memberikan hasil defleksi yang lebih kecil daripada kabel IWRC 6×36. Sedangkan pada bentang 160 meter hingga lebih dari 200 meter jenis kabel yang paling efektif untuk digunakan adalah jenis kabel Locked-coil.Kata kunci: jembatan pejalan kaki, jembatan suspension, defleksi, jenis kabel ABSTRACTCable structure on suspension bridge act as the main support of the load on the bridge. The difference in the type of cable will affect the value of deflection, tension of cable, and the tension of girder. Due to that condition, then an evaluation study of bridge deflection value based on variation of cable type and span length was performed. Type of cables used are IWRC 6×36, Spiral Strand Rope, and Locked-coil Rope, while the variation of the span are 80 meters, 160 meters, and 200 meters. The load system on the bridge structure model referring to “Surat Edaran Menteri Pekerjaan Umum No.02/SE/M/2010”. The analysis using 14th version of SAP 2000 aplication. The result of analysis shows that in the span less than 80 meters there are no such a significant  differences between the three types of cable. In the span of 80 meters to 160 meters, Spiral Strand and Locked-coil profide smaller deflection. While in the span of 160 meters to more than 200 meters, the most effective cable is Locked-coil cable.Keywords: pedestrian bridge, suspension bridge, deflection, cable type


2006 ◽  
Vol 11 (3) ◽  
pp. 293-318 ◽  
Author(s):  
M. Zribi ◽  
N. B. Almutairi ◽  
M. Abdel-Rohman

The flexibility and low damping of the long span suspended cables in suspension bridges makes them prone to vibrations due to wind and moving loads which affect the dynamic responses of the suspended cables and the bridge deck. This paper investigates the control of vibrations of a suspension bridge due to a vertical load moving on the bridge deck with a constant speed. A vertical cable between the bridge deck and the suspended cables is used to install a hydraulic actuator able to generate an active control force on the bridge deck. Two control schemes are proposed to generate the control force needed to reduce the vertical vibrations in the suspended cables and in the bridge deck. The proposed controllers, whose design is based on Lyapunov theory, guarantee the asymptotic stability of the system. The MATLAB software is used to simulate the performance of the controlled system. The simulation results indicate that the proposed controllers work well. In addition, the performance of the system with the proposed controllers is compared to the performance of the system controlled with a velocity feedback controller.


2012 ◽  
Vol 18 (6) ◽  
pp. 1552-1559
Author(s):  
Shinichi Konno
Keyword(s):  

2019 ◽  
Author(s):  
Hossein Alimohammadi ◽  
Mostafa Dalvi Esfahani ◽  
Mohammadali Lotfollahi Yaghin

In this study, the seismic behavior of the concrete shear wall considering the opening with different shapes and constant cross-section has been studied, and for this purpose, several shear walls are placed under the increasingly non-linear static analysis (Pushover). These case studies modeled in 3D Abaqus Software, and the results of the ductility coefficient, hardness, energy absorption, added resistance, the final shape, and the final resistance are compared to shear walls without opening.


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