An analytical algorithm for reasonable central tower stiffness in the three-tower suspension bridge with unequal-length main spans

2019 ◽  
Vol 199 ◽  
pp. 109595 ◽  
Author(s):  
Wen-ming Zhang ◽  
Chao-yu Yang ◽  
Zhi-wei Wang ◽  
Zhao Liu
Keyword(s):  
Suspension Bridge ◽  
Analytical Algorithm ◽  
Unequal Length

Suspension bridge deformation and internal forces under the concentrated live load: Analytical algorithm

2021 ◽  
Vol 248 ◽  
pp. 113271
Author(s):  
Wen-ming Zhang ◽  
Jia-qi Chang ◽  
Xiao-fan Lu ◽  
Gen-min Tian ◽  
Jin-guo Li
Keyword(s):  
Suspension Bridge ◽  
Live Load ◽  
Analytical Algorithm ◽  
Internal Forces

An analytical algorithm for the pylon saddle pushing stage and distance during the suspension bridge construction

2019 ◽  
Vol 22 (15) ◽  
pp. 3290-3305
Author(s):  
Wen-ming Zhang ◽  
Kai-rui Qian ◽  
Gen-min Tian ◽  
Zhao Liu
Keyword(s):  
Stress State ◽  
Proper Time ◽  
Bending Moment ◽  
Strength Criterion ◽  
Suspension Bridge ◽  
Suspension Bridges ◽  
Bridge Construction ◽  
Main Cable ◽  
Analytical Algorithm ◽  
Tensile Forces

During the construction of suspension bridges, the stress state of the pylon (tower) is improved by pushing the pylon saddle by an appropriate distance at the proper time. An analytical algorithm for the assessment of the required timing and displacements for the pylon saddle pushing at particular construction stages is proposed and verified in this study. The timing calculation is based on the assessment of current hanger tensile forces at each construction stage and the pylon stress state, while the pushing distance/displacement is derived from the conditions of elevation difference closure and the conservation of unstrained length of the main cable segments. This algorithm was successfully applied during the construction of a particular suspension bridge in China with a main span of 730 m. The results obtained strongly indicate that the bending moment in the pylon bottom is contributed by both horizontal and vertical forces of the main cable. The horizontal constituent is dominant and its share gradually increases in the bridge construction process. In a suspension bridge with side spans of various lengths, the stresses in the pylon bottom on the side with a larger side span is more likely to exceed the limit. Therefore, the respective strength criterion controls the pylon saddle-pushing schedule. The proposed analytical algorithm is quite straightforward and is recommended for wider application.

scholarly journals An Improved Analytical Algorithm on Main Cable System of Suspension Bridge

2018 ◽  
Vol 8 (8) ◽  
pp. 1358 ◽  
Author(s):  
Chuanxi Li ◽  
Jun He ◽  
Zhe Zhang ◽  
Yang Liu ◽  
Hongjun Ke ◽  
...  
Keyword(s):  
Search Algorithm ◽  
Suspension Bridge ◽  
Internal Force ◽  
Element Formulation ◽  
Cable System ◽  
Tangent Stiffness Matrix ◽  
Main Cable ◽  
Penalty Factor ◽  
Analytical Algorithm ◽  
Internal Force Vector

This paper develops an improved analytical algorithm on the main cable system of suspension bridge. A catenary cable element is presented for the nonlinear analysis on main cable system that is subjected to static loadings. The tangent stiffness matrix and internal force vector of the element are derived explicitly based on the exact analytical expressions of elastic catenary. Self-weight of the cables can be directly considered without any approximations. The effect of pre-tension of cable is also included in the element formulation. A search algorithm with the penalty factor is introduced to identify the initial components for convergence with high precision and fast speed. Numerical examples are presented and discussed to illustrate the accuracy and efficiency of the proposed analytical algorithm.

Control of Vibrations due to Moving Loads on Suspension Bridges

2006 ◽  
Vol 11 (3) ◽  
pp. 293-318 ◽  
Author(s):  
M. Zribi ◽  
N. B. Almutairi ◽  
M. Abdel-Rohman
Keyword(s):  
Bridge Deck ◽  
Suspension Bridge ◽  
Lyapunov Theory ◽  
Dynamic Responses ◽  
Suspension Bridges ◽  
Control Force ◽  
Moving Loads ◽  
Hydraulic Actuator ◽  
Long Span ◽  
Suspended Cables

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.

New Concept for Main Cable of Suspension Bridge

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

STRATEGI BRANDING IDENTITY @SITUGUNUNGSUSPENSIONBRIDGE DI KAB SUKABUMI UNTUK MENINGKATKAN PARIWISATA

2020 ◽  
Vol 4 (1) ◽  
pp. 36-45
Author(s):  
Hilda Sri Rahayu ◽  
Susanne Dida ◽  
Yanti Setianti
Keyword(s):  
Suspension Bridge ◽  
Brand Identity

Penelitian ini dilakukan pada objek wisata situ gunung suspension bridge. tujuan penelitian adalah bagaiamana strategi brand identity yang dilakukan oleh situ gunung melalu media sosial Instagram di akun @situgunungsuspensionbridege dalam menarik wisatawan, serta bagaimana strategi yang dilakukan oleh akun media sosial situ gunung melalui brand identity wisata ini menjadi simbol daya tarik untuk para wisatawan, penelitian ini dilakukan untuk melihat pembentukan brand idenitity yang ada di media sosial instagram terhadap kunjungan wisatawan penulis ingin mengetahui keadaan dari segi perusahaan dan juga dari stakeholder. Metode penelitian yang digunakan dalam penelitian ini adalah kualitatif deskriptif dengan metode studi kasus. Hasil penelitian menunjukan bahwa strategi brand identity di media sosial Instagram @situgunungsuspensionbridge dari yaitu Humas situ gunung yang melakukan pendekatan dengan pemangku kepentingan yaitu Kementerian Lingkungan Hidup dan Kehutanan strategi branding identity yang dilakukan untuk membuat masyarakat yang ada di sekitar Kab Sukabumi serta masyarakat yang ada di lndonesia mengunjungi objek wisata baru branding identity yang dimplementasikan dan dievaluasi dengan baik.

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

2018 ◽  
Vol 74 (4) ◽  
pp. I_803-I_817
Author(s):  
Shingo IWASHITA ◽  
Hitoshi NAKAMURA ◽  
Kuniei NOGAMI ◽  
Yusuke KISHI ◽  
Kazuya MAGOSHI ◽  
...  
Keyword(s):  
Seismic Behavior ◽  
Suspension Bridge ◽  
Span Length
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