Flexural properties of a lightweight hybrid FRP-aluminum modular space truss bridge system

2014 ◽  
Vol 108 ◽  
pp. 600-615 ◽  
Author(s):  
Dongdong Zhang ◽  
Qilin Zhao ◽  
Yaxin Huang ◽  
Fei Li ◽  
Haosen Chen ◽  
...  
Keyword(s):  
Modular Space ◽  
Flexural Properties ◽  
Space Truss ◽  
Truss Bridge ◽  
Bridge System

A simple analytical solution for predicting deflection of a hybrid FRP-aluminum modular space truss bridge

2015 ◽  
Vol 22 (11) ◽  
pp. 4414-4425 ◽  
Author(s):  
Fei Li ◽  
Dong-dong Zhang ◽  
Qi-lin Zhao ◽  
An-zhong Deng
Keyword(s):  
Analytical Solution ◽  
Modular Space ◽  
Space Truss ◽  
Truss Bridge

Damage Detection of Space Truss Using Second Order Polynomial Method With BFGS Quasi-Newton Optimization

2010 ◽  
Author(s):  
Chun Nam Wong ◽  
Jingqi Xiong ◽  
Hong-Zhong Huang ◽  
Tianyou Hu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Damage Detection ◽  
Element Model ◽  
Second Order ◽  
Modular Space ◽  
Polynomial Method ◽  
Structural Variants ◽  
Space Truss ◽  
System Equations

A second order damage detection method is developed by expanding the original eigenparameters using their sensitivity terms with the variations in the structural variants. This vibration-based polynomial method is generated from eigenvalue re-analysis in conjunction with the polynomial algorithm. By incorporating basic forms of the Lagrange factor functions, numerical eigenparameter functions are generalized to multi-variate polynomial interpolated forms. Second order sensitivity terms are computed by differentiating these multi-variate eigenparameter functions with respect to the structural variants. Convergence of different order algorithms are compared using finite element model of a four element cantilever beam structure under various damaged percentage cases. Moreover, finite element model of a four bay modular space truss is established. Damage detections from small to large percentages are carried out through numerical simulations on the space truss. Most of these cases converge efficiently toward the ultimate solutions within 1% termination level. Therefore the BFGS algorithm works well with the nonlinear multi-variate system equations. The algorithm operates robustly with limited number of d.o.f.s in the reduced order model and limited number of vibration modes in the full model.

Vehicle Parameters Influence on Vertical Load-Carrying Natural Frequency of Railway Double-Track Steel Truss Continuous Bridge

2012 ◽  
Vol 446-449 ◽  
pp. 2613-2616
Author(s):  
Jian Ying Ren ◽  
Mu Biao Su ◽  
Wen Ping Li
Keyword(s):  
Natural Frequency ◽  
High Speed ◽  
Vertical Load ◽  
Suspension Spring ◽  
Steel Truss Bridge ◽  
Load Carrying ◽  
Steel Truss ◽  
Truss Bridge ◽  
Double Track ◽  
Bridge System

The railway double-track continuous bridge vertical load-carrying frequency is calculated with the vehicle-bridge system mode1. When two lines with 20 same high-speed passenger vehicles are traveling on the 3×64 m through stud welding railway steel truss bridge from both ends, it is analyzed that the vehicle parameters how to influence the bridge vertical load-carrying frequency. The bridge vertical load-carrying frequency is influenced by the unsprung mass of each wheel-set of the vehicle, the suspension spring stiffness, the vehicle length and the mass of the vehicle. But it is independent of the speed of the train．It is shown that the bridge vertical load-carrying frequency is the vehicle-bridge system natural frequency, it is only depend on its natural parameters.

Analytical solutions of the torsional mechanism for a new hybrid fiber-reinforced polymer–aluminum twin-trackway space truss bridge

2016 ◽  
Vol 19 (12) ◽  
pp. 1832-1840 ◽  
Author(s):  
Dongdong Zhang ◽  
Feng Li ◽  
Qilin Zhao ◽  
Yingchang Duan
Keyword(s):  
Analytical Solutions ◽  
Fiber Reinforced Polymer ◽  
Torsional Stiffness ◽  
Torsional Angle ◽  
Fiber Reinforced ◽  
Pure Torsion ◽  
Space Truss ◽  
Reinforced Polymer ◽  
Torsional Mechanism ◽  
Truss Bridge

For emergency purposes, a lightweight space truss bridge was designed. The bridge is composed of twin triangular deck-truss beams incorporating new structural forms and advanced fiber-reinforced polymer profiles. As a new structure, the structural properties of its triangular deck-truss beam have been studied in detail; however, a design-oriented study facilitating the application of the entire twin-trackway bridge under pure torsion remains to be undertaken. The objective of this article is to analytically explore the torsional mechanism of the twin-trackway bridge, which is characterized by torsional angle and torsional stiffness. To verify the derivation procedures and formulae, the pure torsion test and numerical analysis are conducted on a full-scale specimen. The results indicate that the analytical solutions compare well with the experimental and numerical results. The torsional moment is primarily resisted by the vertical bending of twin triangular deck-truss beams. The simplified analytical model can be used with sufficient accuracy for the design of the bridge.

Torsional behavior of a hybrid FRP-aluminum space truss bridge: Experimental and numerical study

2018 ◽  
Vol 157 ◽  
pp. 132-143 ◽  
Author(s):  
Dongdong Zhang ◽  
Qilin Zhao ◽  
Feng Li ◽  
Jie Tao ◽  
Yifeng Gao
Keyword(s):  
Numerical Study ◽  
Space Truss ◽  
Torsional Behavior ◽  
Truss Bridge

Structural Evaluation of Torsional Rigidity of New FRP–Aluminum Space Truss Bridge with Rigid Transverse Braces

2019 ◽  
Vol 23 (7) ◽  
pp. 3021-3029 ◽  
Author(s):  
Le Zhu ◽  
Dongdong Zhang ◽  
Fei Shao ◽  
Qian Xu ◽  
Qilin Zhao
Keyword(s):  
Torsional Rigidity ◽  
Space Truss ◽  
Structural Evaluation ◽  
Truss Bridge

Innovative Prestressed Steel Composite Short-to Medium-Span Bridges

1997 ◽  
Vol 1594 (1) ◽  
pp. 21-33
Author(s):  
Dan Burroughs ◽  
James Lockwood ◽  
Kenneth Price
Keyword(s):  
High Performance ◽  
Precast Concrete ◽  
Modular Space ◽  
Iron And Steel ◽  
Construction Methods ◽  
Space Truss ◽  
Integral Abutments ◽  
Jointless Bridges ◽  
Steel Composite ◽  
Bridge Performance

Methods for combining both prestressing, high-performance steel and composite concrete decks to improve bridge performance, construe-tibility, aesthetics, and economy are reviewed. The designs are part of a study sponsored by the American Iron and Steel Institute. Five bridge concepts have been developed to the preliminary design phase, including plan details and cost comparisons. Single- and two-span bridges with span lengths of between 24.4 and 54.9 m (80 and 180 ft) have been studied. The alternates developed use prestressing both longitudinally in the main structural components and transversely in the deck. Alternates include a modular space truss, a twin warren truss, a composite steel box, and steel girders. All alternates have either a cast-in-place or a precast concrete deck. Advantages include improved durability and reduced maintenance with the use of prestressing in the deck, which eliminates deck cracking. The use of corrosion-resistant steel eliminates painting requirements. Elimination of deck joints and use of integral piers and abutments also improve durability. Economy can be improved with the combined efficient use of steel, prestressing, and concrete; with the use of jointless bridges and integral abutments and piers; and by increasing shipping lengths, reducing the number of splices, and optimizing construction methods, which are integrated into the design. Construction issues are reviewed to reduce fabrication costs and to simplify bridge erection.

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