Experimental techniques for the determination of the dynamic responses of structures to wind

Meccanica ◽  
1990 ◽  
Vol 25 (3) ◽  
pp. 147-158 ◽  
Author(s):  
Barry J. Vickery
Keyword(s):  
Dynamic Responses ◽  
Experimental Techniques

scholarly journals Investigation of a Stochastic Inverse Method to Estimate an External Force: Applications to a Wave-Structure Interaction

2012 ◽  
Vol 2012 ◽  
pp. 1-25 ◽  
Author(s):  
S. L. Han ◽  
Takeshi Kinoshita
Keyword(s):  
External Force ◽  
Inverse Method ◽  
Inverse Function ◽  
Wave Structure ◽  
Dynamic Responses ◽  
Structure Interaction ◽  
External Forces ◽  
Interaction Problem ◽  
Wave Structure Interaction

The determination of an external force is a very important task for the purpose of control, monitoring, and analysis of damages on structural system. This paper studies a stochastic inverse method that can be used for determining external forces acting on a nonlinear vibrating system. For the purpose of estimation, a stochastic inverse function is formulated to link an unknown external force to an observable quantity. The external force is then estimated from measurements of dynamic responses through the formulated stochastic inverse model. The applicability of the proposed method was verified with numerical examples and laboratory tests concerning the wave-structure interaction problem. The results showed that the proposed method is reliable to estimate the external force acting on a nonlinear system.

scholarly journals Concrete propensity to fire spalling: testing and observations

2018 ◽  
Vol 163 ◽  
pp. 02004 ◽  
Author(s):  
Izabela Hager ◽  
Katarzyna Mróz ◽  
Tomasz Tracz
Keyword(s):  
Cement Paste ◽  
Experimental Studies ◽  
Experimental Techniques ◽  
Concrete Slabs ◽  
Cement Type ◽  
Material Parameters ◽  
Constant Content

This article presents results of fire spalling tests on small concrete slabs and studies of material parameters that may increase its occurrence. Experimental techniques enabling to study and determination of material features are presented and discussed. Experimental studies on spalling behaviour of elements were carried out on seven different concrete mixes with constant content of cement paste and mortar. Research aimed at determining influence of the following parameters: w/c ratio (0.30; 0.45; 0.60), cement type (CEM I, CEM III) and type of aggregates (riverbed gravel, granite, basalt) on fire concrete spalling. Paper discusses also the influence of cold rim that forms while testing slab-like element is subjected to one-side heating.

Application of Models to Determination of Nutrient Requirements: Experimental Techniques Employing Tracers

1992 ◽  
Vol 122 (suppl_3) ◽  
pp. 701-705
Author(s):  
C. F. Ramberg ◽  
C. R. Krishnamurti ◽  
D. Peter ◽  
J. E. Wolff ◽  
R. C. Boston
Keyword(s):  
Experimental Techniques ◽  
Nutrient Requirements

Determination of Muscle Orientations and Moment Arms

1984 ◽  
Vol 106 (3) ◽  
pp. 280-282 ◽  
Author(s):  
K. N. An ◽  
K. Takahashi ◽  
T. P. Harrigan ◽  
E. Y. Chao
Keyword(s):  
Muscle Force ◽  
Experimental Techniques ◽  
Force Analysis ◽  
Equilibrium Equations ◽  
Extensive Experience ◽  
Load Measurement ◽  
Moment Arms ◽  
Advantages And Disadvantages ◽  
Geometric Measurement

In muscle force analysis, orientations and moment arms of the muscles about a joint provide essential coefficients in the equilibrium equations. For the determination of these parameters, several experimental techniques, including geometric measurement, tendon-joint displacement measurement and direct load measurement, are available. Advantages and disadvantages associated with each of the techniques are reviewed and compared based on our extensive experience.

Determination of the structure of the atmosphere between 90 and 250 km by means of contaminant releases at Woomera, May 1968

1972 ◽  
Vol 271 (1218) ◽  
pp. 631-663 ◽  
Keyword(s):  
Wind Velocity ◽  
Turbulent Structure ◽  
Experimental Techniques ◽  
Atmospheric Structure ◽  
May 1968 ◽  
Combined Measurements

Two Skylark rockets were launched from Woomera rocket range, Australia (31° S) on the morning and evening of 31 May 1968. Coordinated series of measurements of neutral atmospheric wind velocity, turbulent structure, temperature and density were made during each launch between 90 and 250 km altitude, combining the experimental techniques of the two groups involved. This paper attempts to construct from the combined measurements made on these occasions a dynamic picture of the interactions of atmospheric structure, and to relate the observations to previous results obtained by ourselves and other workers.

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