Results 221 to 230 of about 848,441 (265)

Validation of Dynamic Increase Factors in Structural Design Codes

IABSE Reports, 2016
<p>In the design of structural concrete for impact loading, design or model codes often employ a dynamic increase factor (DIF) to impose dynamic effect on static response. DIF that are obtained from material test results and that are currently adopted design codes like ACI 349M-06, fib Model Code 2010 and ACI 370R-14.
Yong Jae Yu, Jae-Yeol Cho
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Determining the Dynamic Increase Factor for Glued-Laminated Timber Beams

Journal of Structural Engineering, 2018
AbstractThis paper presents the results from an experimental program that investigated the flexural behavior of glulam beams subjected to dynamic loading.
Daniel N. Lacroix, Ghasan Doudak
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Effects of damping ratio on dynamic increase factor in progressive collapse

Steel and Composite Structures, 2016
In this paper, the effect of damping ratio on nonlinear dynamic analysis response and dynamic increase factor (DIF) in nonlinear static analysis of structures against column removal are investigated and a modified empirical DIF is presented. To this end, series of low and mid-rise moment frame structures with different span lengths and number of ...
Javad Mashhadi, Hamed Saffari
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Assessment of dynamic increase factor for progressive collapse analysis of RC structures

Engineering Failure Analysis, 2018
Abstract Assessment of a building vulnerability against progressive collapse using Nonlinear Dynamic (NLD) analysis has greater accuracy compared to other methods. Yet, the relevant standards and design guidelines allows the use of Linear Static (LS) analysis and Nonlinear Static (NLS) analysis to assess the progressive collapse risks of buildings ...
Setareh Amiri, Hamed Saffari, Javad Mashhadi   +2 more
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Evaluation of dynamic increase factor models for steel fibre reinforced concrete

Construction and Building Materials, 2018
The use of steel fibre reinforced concrete (SFRC) in protective structures against extreme loading conditions (e.g. high-velocity impact and blast) has gained worldwide interest in recent years, which is attributed to its advantages of higher tensile strength and better energy absorption capability compared to normal concrete.
Yang, Lei, Lin, Xiaoshan, Gravina, Rebecca J.   +2 more
openaire   +3 more sources

Effects of Postelastic Stiffness Ratio on Dynamic Increase Factor in Progressive Collapse

Journal of Performance of Constructed Facilities, 2017
AbstractPrediction of structural response at the sudden removal of gravity load-bearing element in structures is an important issue in assessing progressive collapse potential of structures.
Javad Mashhadi, Hamed Saffari
openaire   +1 more source

Climate Factors Increasing Importance for Internal P Dynamics in a Large Eutrophic Lake

Science of The Total Environment
Legacy phosphorus (P) from lake sediment impedes catchment based measures aimed at improving water quality. While evidence based water quality recovery targets are essential for sustainable lake management there is little information on the long-term behaviour of internal reservoirs of P.
James, Thompson, Yvonne, McElarney, Brian, Rippey, Richard, Douglas, Brenda, Walker, Stephen, Prentice   +5 more
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Experimental and numerical investigation on the dynamic increase factor of tensile strength in concrete

International Journal of Impact Engineering, 2018
Abstract A unique design for a vertical tension split Hopkinson bar (TSHB) with steel bars 100 mm in diameter and an aluminum hammer is presented. This facility was used to investigate the behavior of concrete under dynamic tension. Experiments conducted with specially shaped concrete samples demonstrate that the testing system is capable of ...
David Levi-Hevroni, Eytan Kochavi, Boaz Kofman, Shimon Gruntman, Oren Sadot   +4 more
openaire   +1 more source

Modification of dynamic increase factor to assess progressive collapse potential of structures

Journal of Constructional Steel Research, 2017
Abstract Progressive collapse assessment of buildings against column removal requires a time consuming nonlinear dynamic analysis therefore nonlinear static analysis considering a proper dynamic increase factor (DIF) can be utilized as an alternate analysis to predict maximum dynamic response of structures.
Javad Mashhadi, Hamed Saffari
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A proper estimation of inelastic dynamic increase factor in support-loss experiments

Journal of the Chinese Institute of Engineers, 2014
Dynamic increase factor (DIF) is usually approximated as the ratio of maximum to neutral response in dynamic support-loss experiments. However, this neutral-based calculation may underestimate the real DIF for elasto-plastic response. In this study, an analytical formulation is thus proposed to correct the neutral-based DIF based on measured dynamic ...
Meng-Hao Tsai, Wen-Shinn Shyu
openaire   +1 more source