A5010937912- Structural Engineering and Vibration Analysis
- Railway Engineering and Dynamics
- Structural Load-Bearing Analysis
- Structural Health Monitoring Techniques
- Mechanical stress and fatigue analysis
- Concrete Corrosion and Durability
- Vibration and Dynamic Analysis
- Evaluation Methods in Various Fields
- Metallurgy and Material Forming
- Structural Behavior of Reinforced Concrete
- Concrete Properties and Behavior
- Civil and Structural Engineering Research
- Composite Structure Analysis and Optimization
- Geotechnical Engineering and Underground Structures
Changsha University of Science and Technology
2007-2024
This paper proposes a forward iterative algorithm designed for determining the fabrication geometry of steel girder in cable-stayed bridges during segment installation process. The expression control parameters and geometric dimensions is deduced based on geometry. Based equivalent plane spatial stay cables, this establishes to simulate construction process bridges, employing unstressed cable length as calculation parameter. programmed into finite element method software, enabling precise...
Abstract Steel‐concrete composite box girders offer notable advantages such as high stiffness, excellent torsional performance, and light self‐weight, making them prevalent in large‐span bridges, particularly cable‐stayed configurations. However, a persistent challenge arises from the shear lag effect concrete slab within flanges induced by shearing interactions between webs flanges. Limited attention has been devoted to investigating experimental theoretical aspects of long‐span bridges...
This paper proposes a new cable element and novel formation procedure of unbalanced loads for cable-stayed bridges. The proposed method couples the effects geometric nonlinearity concrete creep/shrinkage. An improved catenary with arbitrary rigid arms is introduced to reduce degree freedoms in simulations. explicit expression tangent stiffness derived. Then, an incremental equation under co-rotational coordinate system established by introducing recurrence creep loads. Following this,...
This paper proposes an equivalent plane algorithm of spatial stay cables using rigid arms and the cable corotational coordinate system. The equations for displacements force elements are established, plane-element stiffness matrix spatial-cable element its transfer derived. is automatically transformed into plane-cable model with arm when cable-stayed bridge parallel. characteristic parameters proposed, effect on internal deformation also analyzed. programmed design construction monitoring...
Based on the shear flow theory for thin‐walled sections, a method calculating stress nonuniformity coefficient ( µ ) of section is proposed according to energy principle, and formulas values several common sections are derived. The obtained value box increases as aspect ratio increases. Compared with commonly used calculation methods, gives more reasonable results shows that effect in flange flat should not be ignored. effects web thicknesses analyzed discussed. these effects, simplified...
To reach the optimum mechanics state of long span prestressed concrete cable-stayed bridge after it erected by construct control, a method is proposed to identify, predict and adjust parameter in control bridge, which integrates minimum square method, grey prediction theory model influence matrix adjustment compositively. The also verified longest prestress Asia, effect very successful. This work con-struct can absolutely demonstrate validity practicability method.
To investigate the influence of temperature on longitudinal displacement an asymmetric cable-stayed bridge with a hybrid girder, finite-element system (FES) and simplified girder bearings in pylon area were established. The systems based during period after closure midspan before opening to traffic. bearing reaction piers unbalanced force horizontal direction calculated according data collected case drastic changes for 24 h. results entire substituted into calculation. compared h onsite...
Conduct bridge type adaptability research in national scope, based on this, construct the highway database system [1], and put forward evaluation method, index its value typical comprehensive performance. On foundation of index, establish selection analysis model analytic hierarchy process fuzzy mathematics theory, then depend conduct comparison new sample form key technology [2].
The construction process of composite cable-stayed bridges varies, and it closely affects the finished bridge. This study takes Chibi Yangtze River Highway Bridge, which is world's largest-span bridge, as an example in determining optimal scheme girder erection during Six schemes were proposed for comparison analysis. On basis satisfying objective principles stress safety principle, economic qualitative quantitative methods used to analyze schemes. refined model segment was established by...
This paper presents a new closure method for closing the deck in middle span of cable-stayed bridge. It discusses mechanism single joint and develops regression approach fabrication dimensions segment incorporating with temperature correction based on field measurement. Following this, authors propose key erection procedures pulling system Jingyue Bridge China. The application this completed bridge demonstrates proposed method, simple operation high accuracy.