DYNAMIC EFFECTS IN A COMPOSITE TWO-COMPONENT RODS WHICH APPEAR WHEN LOCAL FRACTURE OF THE MATRIX IS OCCURRED

  • Vitaly Ivanovich Kolchunov South-West State University, Kursk, Russia,
  • Sergey Yurievich Savin South-West State University, Kursk, Russia
Keywords: Longitudinal oscillations, Progressive collapse, Stresses, Matrix, Dynamics, Dynamic Effects, Concrete, Composition,

Abstract


The article deals with the estimation of the dynamic increase of stresses in the element made of the composite two-component  material such as reinforced concrete, that appears when local destruction of the concrete matrix (crack formation) occurs. When the brittle fracture of the concrete occurs the stresses acting in the stretched concrete are transmitted to the reinforcing bars instantaneously that leads to longitudinal oscillations. In this moment stresses acting in the reinforcing bars can be higher than ultimate stresses. Hence progressive collapse of a structure is possible. It is presented general solution of the forced longitudinal oscillations problem. Displacement and stress increment equations are given. General solution is illustrated by analysis of a progressive collapse of a large-panel folded shell when local destruction of concrete matrix in the tightening element occurs.

References

Kolchunov V.I, Klyuyeva N.V., Androsova N.B., Bukhtiyarova A.S. (2014) Zhivuchest' zdaniy i sooruzheniy pri zaproyektnykh vozdeystviyakh [Survivability of buildings and structures under beyond design impacts], Publishing house ASV, Moscow

Wenga J., Tana K.H., Leeb C.K. (2017) Modeling progressive collapse of 2D reinforced concrete frames subject to column removal scenario. Engineering Structures, 141, 126–143. doi:10.1016/j.engstruct.2017.03.018

Xianzhong Zhao, Shen Yan, Yiyi Chen, Zhenyu Xu, Yong Lu (2017) Experimental study on progressive collapse-resistant behavior of planar trusses. Engineering Structures, 135, 104–116. doi:10.1016/j.engstruct.2016.12.013

Wenda Wang, Huawei Li, Jingxuan Wang (2017) Progressive collapse analysis of concrete-filled steel tubular column to steel beam connections using multi-scale model. Structures, 9, 123–133. doi:10.1016/j.istruc.2016.10.004

Feng Miao, Michel Ghosn (2016) Reliability-based progressive collapse analysis of highway bridges. Structural Safety, 63, 33–46. doi:10.1016/j.strusafe.2016.05.004

Fedorova N.V., Khalina T.A. (2017) Issledovaniye dinamicheskikh dogruzheniy v zhelezobetonnykh konstruktivnykh sistemakh pri vnezapnykh strukturnykh perestroykakh [Research of dynamic stress increasing in reinforced concrete structural systems when structural rearrangements occurs suddenly]. Promyshlennoye i grazhdanskoye stroitel'stvo, 5, 45-49

Dem'yanov A.I., Kolchunov Vl.I., Senchenko D.S., Terskikh A.B. (2017) Raschetnaya model' statiko-dinamicheskogo deformirovaniya v zhelezobetonnoy tsentral'no - rastyanutoy konstruktsii v moment razrusheniya betonnoy matritsy [A computational model of static-dynamic deformation in a reinforced concrete centrally-stretched structure at the moment of destruction of a concrete matrix]. Stroitel'stvo i rekonstruktsiya, 2, 3-9

Geniyev G. A., Kolchunov V. I., Klyuyeva N. V. and etc. (2004) Prochnost' i deformativnost' zhelezobetonnykh konstruktsiy pri zaproyektnykh vozdeystviyakh [Strength and deformability of reinforced concrete structures under beyond-design effects], Publishing house ASV, Moscow

Gordon V. A., Kravtsova E. A. (2010) Pereraspredeleniye napryazhennosti v slozhnoy sostavnoy balke pri degradatsii svyazey sdviga [Redistribution of stresses in a loaded composite beam during degradation of shear bonds]. Stroitel'naya mekhanika i raschet sooruzheniy, 4, 2-6

Gordon V.A., Kravtsova E.A. (2012) Dinamicheskiye dogruzheniya v balke s raznourovnevymi potol'nymi rassloyeniyami [Dynamic force increasing in a beam with multilevel longitudinal cracks]. Stroitel'stvo i rekonstruktsiya, 6(44), 17-27

(2010) Posobiye po proyektirovaniyu zhelezobetonnykh prostranstvennykh konstruktsiy pokrytiy i perekrytiy (k SP 52-117-2008 *) [Manual on the design of reinforced concrete spatial structures of coatings and overlappings (to SP 52-117-2008*)]. SRIRC named after A.A. Gvozdev - Institute of JSC "Science and Research Center " Construction", Moscow

Kolchunov V.I., Pyatikrestovskiy K.P., Klyuyeva N.V. (2008) Prostranstvennyye konstruktsii pokrytiy: uchebnoye posobiye [Spatial construction of coatings: a textbook], Publishing house ASV, Moscow

(2011) Svod pravil SP 63.13330.2012 “Zhelezobetonnyye konstruktsii. Osnovnyye polozheniya. Aktualizirovannaya redaktsiya SP 52-01-2003: izdaniye ofitsial'noye” [Code of Regulations SP 63.13330.2012 "Reinforced concrete structures. Basic provisions. Updated version of SP 52-01-2003: official edition"], Minregion, Moscow (in Russian).

Published
2017/09/15
Section
Original Scientific Paper