Interferometric radar application for dynamic testing of bridge structures

2014 ◽  
pp. 2289-2296 ◽  
Author(s):  
D Beben ◽  
W Anigacz
Keyword(s):  
Dynamic Testing ◽  
Bridge Structures

Numerical and Experimental Assessment of the Highway Arch Viaduct

2015 ◽  
Vol 769 ◽  
pp. 252-259
Author(s):  
Jan Bencat ◽  
Maria Stehlikova ◽  
Milan Skarupa
Keyword(s):  
Dynamic Testing ◽  
Highway Bridges ◽  
Structural Condition ◽  
Traffic Load ◽  
Analytical Models ◽  
Mode Shapes ◽  
Bridge Structure ◽  
Modal Damping ◽  
Bridge Structures ◽  
And Performance

Full–scale dynamic testing of bridge structures can provide valuable information on the service behavior and performance of structures. With the growing interest in the structural condition of highway bridges, dynamic testing can be used as a tool for assessing the integrity of bridges. From the measured dynamic response, induced by instructed passing trucks, modal parameters (natural frequencies, mode shapes and modal damping values) and system parameters (stiffness, mass and damping matrices) are obtained. These identified parameters can then be used to characterize and monitor the service of the bridge structure in the future. Analytical models of the structure can also be validated using these parameters [1,2]. The paper presents a procedure for estimating the traffic load bearing capacity of the steel arch highway viaduct Bridge Structure 205 (DC1–9, 755 m) constructed on Highway D1 in Nord Slovakia (Fig. 1) over the natural hollow basin via dynamic tests of the viaduct structures.

Dynamic testing of a corrugated steel arch bridge

2008 ◽  
Vol 35 (3) ◽  
pp. 246-257 ◽  
Author(s):  
Zbigniew Manko ◽  
Damian Beben
Keyword(s):  
Vibration Frequency ◽  
Dynamic Load ◽  
Critical Speed ◽  
Dynamic Testing ◽  
The Other ◽  
Steel Plates ◽  
Highway Bridge ◽  
Dynamic Coefficients ◽  
Bridge Structures ◽  
Load Tests

The paper presents the results and conclusions of dynamic load tests that were conducted on a highway bridge over the Gimån River in Sweden made of Super Cor corrugated steel plates (CSP), the first bridge of this type in Scandinavia. The critical speed magnitudes, dynamic coefficients, velocity vibration, and vibration frequency are determined in the paper. Conclusions drawn from the tests can be most helpful in the assessment of the behaviour of this type of corrugated plate – soil bridge. In consideration of the application of this type of structure in the case of small-to-medium span bridges, the conclusions from this research cannot yet be generalized to all types of such solutions. The application details with respect to all types of such bridge structures would require additional analysis (field and model tests and calculations) on the other types of soil–steel bridges.

Development of a Remotely Collaborative Testing Platform for Bridge Structures Based on NetSLab

2013 ◽  
Vol 639-640 ◽  
pp. 1137-1141
Author(s):  
Yu Rong Guo ◽  
Ming Tan
Keyword(s):  
Large Scale ◽  
Structural Model ◽  
Dynamic Testing ◽  
Research Work ◽  
Dynamic Test ◽  
Control Center ◽  
Testing Platform ◽  
Collaborative Testing ◽  
Test Platform ◽  
Bridge Structures

A remotely collaborative pseudo-dynamic testing platform for bridge structures has been developed based on NetSLab system. It can be used for seismic performance investigation of large-scale bridge structures by combining the Internet and sub-structure technology. The testing platform consists of three modules: control center, physical tester and virtual tester. Through a network communication platform, the operation of receiving and feedback of test data between various modules can be realized. Based on the previous research work, a further improvement of the dynamic structural model, the finite element numerical analysis and the rational division of sub-structure has been achieved. A series of remotely virtual collaborative pseudo-dynamic test of bridge structures has been conducted to verify the feasibility of the test platform.

Review of full-scale dynamic testing of bridge structures

1995 ◽  
Vol 17 (2) ◽  
pp. 113-121 ◽  
Author(s):  
O.S. Salawu ◽  
C. Williams
Keyword(s):  
Dynamic Testing ◽  
Full Scale ◽  
Bridge Structures

Remote Hybrid Testing of Asymmetric Structures under Earthquake Excitation

2013 ◽  
Vol 639-640 ◽  
pp. 1168-1174
Author(s):  
Yun Lei Fan ◽  
Yan Xiao ◽  
Yu Rong Guo ◽  
Tao Yuan
Keyword(s):  
Dynamic Testing ◽  
Earthquake Excitation ◽  
Hybrid Testing ◽  
Asymmetric Structures ◽  
Testing Method ◽  
Bridge Structures ◽  
Frame System ◽  
Control Principle ◽  
And Control ◽  
Representative Ground

Based on the pseudo-dynamic testing method and substructure technique, a remote hybrid dynamic testing method for asymmetric-plan buildings considering torsional effects is described. Besides, this paper presents the method and control principle for testing substructures in a single-story frame system under loading due to eccentric lateral responses of superstructure to earthquake motion. Several validated simulation tests of an asymmetric bridge system have been conducted successfully based on the remote testing platform NetSLab and the crossed-response of torsional and translational vibration of bridge structures under three representative ground motions was studied.

Dynamic testing after pituitary surgery: is follow-up re-testing useful?

2008 ◽  
Vol 116 (09) ◽  
Author(s):  
C Berg ◽  
T Meinel ◽  
A Yüce ◽  
H Lahner ◽  
K Mann ◽  
...  
Keyword(s):  
Dynamic Testing ◽  
Pituitary Surgery

Actuation and dynamic mechanical characteristics of a core free flat dielectric electro-active polymer soft actuator

2020 ◽  
Vol 14 (4) ◽  
pp. 7396-7404
Author(s):  
Abdul Malek Abdul Wahab ◽  
Emiliano Rustighi ◽  
Zainudin A.
Keyword(s):  
Theoretical Model ◽  
Resonance Frequency ◽  
Dynamic Testing ◽  
Experimental Results ◽  
Percentage Error ◽  
Initial Tension ◽  
Average Percentage ◽  
Soft Actuator ◽  
Average Percentage Error ◽  
Mechanical Dynamics

Various complex shapes of dielectric electro-active polymer (DEAP) actuator have been promoted for several types of applications. In this study, the actuation and mechanical dynamics characteristics of a new core free flat DEAP soft actuator were investigated. This actuator was developed by Danfoss PolyPower. DC voltage of up to 2000 V was supplied for identifying the actuation characteristics of the actuator and compare with the existing formula. The operational frequency of the actuator was determined by dynamic testing. Then, the soft actuator has been modelled as a uniform bar rigidly fixed at one end and attached to mass at another end. Results from the theoretical model were compared with the experimental results. It was found that the deformation of the current actuator was quadratic proportional to the voltage supplied. It was found that experimental results and theory were not in good agreement for low and high voltage with average percentage error are 104% and 20.7%, respectively. The resonance frequency of the actuator was near 14 Hz. Mass of load added, inhomogeneity and initial tension significantly affected the resonance frequency of the soft actuator. The experimental results were consistent with the theoretical model at zero load. However, due to inhomogeneity, the frequency response function’s plot underlines a poor prediction where the theoretical calculation was far from experimental results as values of load increasing with the average percentage error 15.7%. Hence, it shows the proposed analytical procedure not suitable to provide accurate natural frequency for the DEAP soft actuator.

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