skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Strength of concrete structures under dynamic loading

Abstract

The use of elastic supports is one the efficient methods of decreasing the dynamic loading. The paper describes the influence of elastic supports on the stress-strain state of steel concrete structures exposed to one-time dynamic loading resulting in failure. Oblique bending beams on elastic supports and their elastic, elastoplastic, and elastoplastic consolidation behavior are considered in this paper. For numerical calculations the developed computer program is used based on the finite element method. Research findings prove high efficiency of elastic supports under dynamic loading conditions. The most effective behavior of elastic supports is demonstrated at the elastoplastic stage. A good agreement is observed between the theoretical and experimental results.

Authors:
; ;  [1]
  1. Tomsk State University of Architecture and Building, 2, Solyanaya Sq., 634003, Tomsk (Russian Federation)
Publication Date:
OSTI Identifier:
22494450
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1698; Journal Issue: 1; Conference: AMTC-2015: 2. all-Russian scientific conference of young scientists on advanced materials in technology and construction, Tomsk (Russian Federation), 6-9 Oct 2015; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAMS; BENDING; COMPUTER CODES; CONCRETES; DYNAMIC LOADS; EFFICIENCY; ELASTICITY; FAILURES; FINITE ELEMENT METHOD; STEELS; STRAINS; STRESSES

Citation Formats

Kumpyak, O. G., E-mail: ogkumpyak@yandex.ru, Galyautdinov, Z. R., E-mail: gazr@yandex.ru, and Kokorin, D. N., E-mail: kokorindenn@yandex.ru. Strength of concrete structures under dynamic loading. United States: N. p., 2016. Web. doi:10.1063/1.4937876.
Kumpyak, O. G., E-mail: ogkumpyak@yandex.ru, Galyautdinov, Z. R., E-mail: gazr@yandex.ru, & Kokorin, D. N., E-mail: kokorindenn@yandex.ru. Strength of concrete structures under dynamic loading. United States. doi:10.1063/1.4937876.
Kumpyak, O. G., E-mail: ogkumpyak@yandex.ru, Galyautdinov, Z. R., E-mail: gazr@yandex.ru, and Kokorin, D. N., E-mail: kokorindenn@yandex.ru. 2016. "Strength of concrete structures under dynamic loading". United States. doi:10.1063/1.4937876.
@article{osti_22494450,
title = {Strength of concrete structures under dynamic loading},
author = {Kumpyak, O. G., E-mail: ogkumpyak@yandex.ru and Galyautdinov, Z. R., E-mail: gazr@yandex.ru and Kokorin, D. N., E-mail: kokorindenn@yandex.ru},
abstractNote = {The use of elastic supports is one the efficient methods of decreasing the dynamic loading. The paper describes the influence of elastic supports on the stress-strain state of steel concrete structures exposed to one-time dynamic loading resulting in failure. Oblique bending beams on elastic supports and their elastic, elastoplastic, and elastoplastic consolidation behavior are considered in this paper. For numerical calculations the developed computer program is used based on the finite element method. Research findings prove high efficiency of elastic supports under dynamic loading conditions. The most effective behavior of elastic supports is demonstrated at the elastoplastic stage. A good agreement is observed between the theoretical and experimental results.},
doi = {10.1063/1.4937876},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1698,
place = {United States},
year = 2016,
month = 1
}
  • Three IN905XL aluminum alloys with fine grain (1 {micro}m), intermediate grain (3 {micro}m), and coarse grain (5 {micro}m) have been developed by a combination of mechanical alloying (MA) and conventional extrusion in order to investigate their mechanical properties at dynamic strain rates of 1 {times} 10{sup 3} and 2 {times} 10{sup 3} w{sup {minus}1} and a quasi-static strain rate of 10{sup {minus}3} s{sup {minus}1}. Flow stresses are found to increase with decreasing grain size for all the strain rates tested. Negative strain-rate sensitivity of flow stress is observed up to 1 {times} 10{sup 3} s{sup {minus}1} in both intermediate- andmore » coarse-grained IN905XL. At the highest strain rate of 2 {times} 10{sup 3} s{sup {minus}1}, however, all samples showed a positive strain-rate sensitivity of strength. Total elongation at high strain rates is generally larger than that at low strain rates. Total elongation also decreases with grain size for all the strain rates. This decrease in elongation results from an initiation of microcracks at interfaces between the matrix and particles finely dispersed near grain boundary regions, introduced during MA processing; then, this initiation leads elongation of alloys to small limited values.« less
  • To gain insight into material strength and inelastic deformation of ceramics under plane shock wave loading, an in-depth study was carried out on polycrystalline silicon carbide (SiC). Two independent methods were used to determine experimentally the material strength in the shocked state: 1) lateral piezoresistance gauge measurements, and 2) compression and shear wave experiments. The two sets of data were in good agreement. The results show that the Poisson's ratio of the SiC increases from 0.162 to 0.194 at the HEL (11.5 GPa). The elastic-inelastic transition is not distinctive. In the shocked state, the material supports a maximum shear stressmore » increasing from 4.5 GPa at the HEL to 7.0 GPa at twice the HEL. This post-HEL strength evolution resembles neither catastrophic failure due to massive cracking nor classical plasticity response. Confining stress, inherent in plane shock wave compression, plays a dominant role in such a behavior. The observed inelastic deformation is interpreted qualitatively using an inhomogeneous mechanism involving both in-grain micro-plasticity and highly confined micro-fissures. Quantitatively, the data are summarized into an empirical pressure-dependent strength model.« less
  • This paper describes the results of an industry survey of concrete anchorage test data and subsequent exploratory testing in an area where additional data were desired. The survey findings indicated that the majority of testing has been in static tension on wedge, sleeve, and shell expansion anchor configurations. Accordingly, additional testing specifically addressing the effects of anchor preload and dynamic loading was desirable. A series of tests were then accomplished which evaluated the effects of preload upon the strength of concrete anchorages under low cycle dynamic loading. Typical concrete installations of wedge and shell expansion anchors were tested, with loadingmore » of the anchors in direct tension, direct shear, and combined tension and shear. The dynamic loads were applied at a frequency of five hertz, in increasing load steps, until failure occurred. A minimum load level was chosen such that some load reversal occurred, thus causing impacting such as might occur under seismsic loading conditions. It was concluded that, providing the installation torque is properly applied, an expansion anchor will carry low cycle dynamic loads and provide adequate stiffness even though up to one half of the anchor preload is lost.« less
  • The purpose of this study is to evaluate the environment performance of high-strength concrete used in super tall buildings as material of environmental load reduction. To this end, this study proposed a plan for the evaluation of energy consumption and CO{sub 2} emission throughout the life cycle of the building, and calculated the energy consumption and CO{sub 2} emission throughout the life cycle of tall apartment building that was actually constructed using this plan. Then, we evaluated the energy consumption and CO{sub 2} emission reduction performance for the life cycle of the building by the decrease of concrete and reinforcedmore » rebar quantities and the increase of building lifespan obtained through conversion of existing building's concrete compressive strength to 40 MPa high-strength concrete. As a result, the life cycle energy consumption in case 3, a high-strength concrete building, decreased 15.53% and 2.95% respectively compared with cases 1 and 2. The evaluation of the general strength concrete buildings and the life cycle CO{sub 2} emission also decreased 16.70% and 3.37% respectively, compared with cases 1 and 2.« less