Design for dynamic effects in long span footbridges

2009 ◽  
pp. 47-62
Keyword(s):  
Dynamic Effects ◽  
Long Span

Dynamic Parameters of Prestressed Hanging Systems

2021 ◽  
Vol 887 ◽  
pp. 698-705
Author(s):  
N.S. Razzokov ◽  
U.S. Akhmadiyorov
Keyword(s):  
Operating Conditions ◽  
Local Damage ◽  
Dynamic Parameters ◽  
Dynamic Effects ◽  
Static Loads ◽  
Long Span ◽  
Design Basis ◽  
Operational Safety ◽  
Properties Of Materials

The dynamic parameters of long-span prestressed one and two-belt hanging roofs, for which the seismic wavelengths are commensurate with the dimensions of the structure in plan, are considered. Calculated expressions have been obtained to determine the dynamic parameters for symmetric and skew-symmetric oscillations depending on the length of seismic waves.To ensure the operational safety of unique buildings and structures, we studied the change in the structural properties of materials from unfavorable operating conditions, long-term, beyond design-basis static loads, high-intensity dynamic effects, compliance of the support contours and the possibility of local damage and from the failure of cables of the structures under study.

scholarly journals Review on the Impact of Elements Used During Bridge Construction

2021 ◽  
pp. 19-22
Author(s):  
Nikhil Kumar Singh ◽  
Jyoti Yadav
Keyword(s):  
High Strength ◽  
Dynamic Effects ◽  
Earthquake Loads ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Long Span Bridge ◽  
Cable Stays ◽  
The Impact ◽  
Innovative Techniques ◽  
Cable Stayed Bridges

The requirement of long span bridge is increase with development of infrastructure facility in every nation. Long span bridge could be achieved with use of high strength materials and innovative techniques for analysis of bridge. Generally, cable-supported bridges comprise both suspension and cable-stayed bridges. Cable-supported bridges are very flexible in behavior. These flexible systems are susceptible to the dynamic effects of wind and earthquake loads. The cable-stayed bridge could provide more rigidity due to the presence of tensed cable stays as a force resistance element.

scholarly journals Experimental Study on Dynamic Effects of a Long-span Railway Continuous Beam Bridge

2018 ◽  
Vol 8 (5) ◽  
pp. 669 ◽  
Author(s):  
Hongye Gou ◽  
Wen Zhou ◽  
Yi Bao ◽  
Xiaobin Li ◽  
Qianhui Pu
Keyword(s):  
Experimental Study ◽  
Continuous Beam ◽  
Dynamic Effects ◽  
Long Span ◽  
Continuous Beam Bridge ◽  
Beam Bridge

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.

Load Testing of Long Span Prestressed Single Tee Beams

PCI Journal ◽  
1988 ◽  
Vol 33 (2) ◽  
pp. 42-51
Author(s):  
Predrag L. Popovic ◽  
Neal S. Anderson
Keyword(s):  
Load Testing ◽  
Long Span
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