دانلود مقالات لاتین گرایش سازه

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Astaneh-Asl, A. (2003) " Progressive Collapse Prevention in New and Existing Buildings", Proceedings, 9th Arab Structural Engineering Conference, November 29-December 1, Abu Dhabi, United Arab Emirates (UAE).

Astaneh-Asl, A. (2003) " World Trade Center Collapse, Field Investigation and Analysis", "Keynote Speech" ", Proceedings, 9th Arab Structural Engineering Conference, November 29-December 1, Abu Dhabi, UAE.
یک مقاله در زمینه فرآیند فروریختن برجهای دوقلو از ابوالحسن آستانه اصل

Astaneh-Asl, A., Heydari, C. and Zhao, Q. (2003) "Analysis of Car-Bomb Effects on Buildings using MSC-Dytran Software and Protective Measures" , Proceedings, Virtual product Development Conference, MSc Software, Octover 13-15, Dearborn, Michigan.

Astaneh-Asl, A., and Zhao,Q. (2002) "Cyclic Behavior of Steel Shear Wall Systems (340K PDF File)", Proceedings, 2002 Annual Stability Conference, Structural Stability Research Council, April 25-27, Seattle

مقاله ای در مورد سیستم سازه ای برج دبی

ACTIVE CONTROL OF WIND-INDUCED BUILDING VIBRATION USING A LINEAR COUPLING STRATEGY

HASHEMI S.M.*,GOLNARAGHI M.F.

* Department of Aerospace Engineering, Ryerson University, Toronto (ON), Canada M5B 2K3

The active control of building vibration is addressed. The aeroelastic lumped mass model of a building is designed to be used as the test bed for the active control system. The five stories lumped parameter model was modeled as a cantilever beam exhibiting planar vibration. A Linear Coupling Control (LCC) strategy was implemented to eliminate the vibrations. An active (moving) mass damper (AMD) was first designed and experimentally implemented to control the first mode vibration of the system. An alternative pendulum control system was then designed and implemented. The proposed pendulum, having three times smaller mass than the AMD, was found to be more effective in reducing the building vibrations.

Keyword: vibrations, active vibration control, aeroelastic model, linear compling
http://sid.ir/en/VEWSSID/J_pdf/103820030105.pdf

BAMBOO: FUNCTIONALLY GRADED COMPOSITE MATERIAL
GHAVAMI K.*,RODRIGUES C.S.,PACIORNIK S.

* Department of Civil Engineering

The bamboo structure can be generally viewed as a Functionally Graded composite material constituted by long and aligned cellulose fibres embedded in a lignin matrix. Analysing the transversal section of a bamboo culm, one can observe that the fibre distribution is variable through its thickness. The non-uniform distribution of fibres prevents the direct application of equations used to model the behaviour of composite materials, as the rule of mixtures equations for strength and modulus of elasticity. These equations assume, besides the perfect bonding between fibre and matrix, uniform distribution of the fibres in the matrix. In bamboo, the fibre distribution follows an organized pattern with a higher concentration of fibres on the outer surface of the culm. Establishing how this variation occurs, the basic equations from the composite materials approach can be modified in order to model the mechanical behaviour of bamboo.

This paper presents the meso-structure analyses of bamboo culms through Digital Image Analysis. The variation of the volume fraction of the cellulose fibres across the transversal section of the bamboo is established. The developed methodology is successfully applied to study the volume fraction variation of fibres in two different samples of bamboo species Phyllostachys heterocycla pubenscens, commonly know as "Moso".

Keyword: bambo, composite materials, MOSO, digital image analysis
ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING) January 2003; 4(1):1-10.
http://sid.ir/en/VEWSSID/J_pdf/103820030104.pdf

COST-EFFECTIVENESS OF VIBRATION CRITERIA FOR WOODEN FLOORS
AFOLAYAN J.O.*

* Civil Engineering Department, Ahmadu Bello University, Zaria, Nigeria

The vibration serviceability requirements for wooden floors in accordance with Eurocode-5 (EC-5) as illustrated by Ohlsson [1] are rated using a combination of Value Analysis (VA) and the Checking Point Method (CPM) of the First-Order Reliability Procedure (FORP). The implied safety indices for the current requirements were first estimated and consequently the associated potential losses were deduced for varying design inputs considered as random variables with practical probability distributions. The preliminary results indicate the direction for enhancing the effective use of timber in flooring systems to withstand human-induced vibrations safely and economically.

Keyword: wooden floors, vibrations, design requirements, reliability, randomness, failure cost
ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING) January 2003; 4(1):23-33.
http://sid.ir/en/VEWSSID/J_pdf/103820030101.pdf

INFLUENCE OF FIBROUS WASTE ADDITION ON THE SHRINKAGE OF MORTARS
BEDDAR M.,BELAGRAA L.

This tentative survey evaluates the influence of fibrous waste (metallic and polypropylene) used on the cracks caused by shrinkage in a mortar prepared from sand of dune (important shrinkage). The achieved tests, to evaluate the free shrinkage or restrained shrinkage, have been reported in this paper. The method described in the article to evaluate the restrained shrinkage consists of using a rigid ring made of steel that is coated by mortar. After hardening, the sample is submitted to conditions required to evaluate the effect of restrained shrinkage. In a given moment, the resistance to the cracking, the number of cracks and the total maximal widths, are measured and compared to what obtained with a plain mortar.

Keyword: free shrinkage, restrained shrinkage, cracking strength, fibrous waste, mortar
ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING) January 2003; 4(1):65-72.

http://sid.ir/en/VEWSSID/J_pdf/103820030102.pdf