Behaviours of reinforced concrete beams under low temperatures

Abstract Reinforced concrete (RC) structure applied in the Arctic engineering and low temperature environment keeps increasing. This paper, experimentally, analytically, and numerically investigated the ultimate strength behaviour of the RC beams under different low temperatures. This paper firstly reported the experimental studies on mechanical properties of the steel reinforcements and normal weight concrete under different low temperatures. Empirical formulae were developed to incorporate the influences of the low temperature on the mechanical properties of the steel reinforcements and concretes. The ultimate strength behaviour of the RC beams under low temperature were studied through twelve quasi-static tests. The influences of the low temperatures and flexural reinforcing ratio on the ultimate strength behaviours of RC beams have been analysed and discussed. Analytical models were developed to predict the resistances corresponding to first crack, steel yielding, and ultimate resistances of the RC beams under low temperatures. Finite element model (FEM) was also developed to simulate the ultimate strength behaviour of the RC beams under low temperature. The accuracies of the analytical models and FEM simulations were checked through validations of the predictions by different models against the test results.

[1]  A W Beeby,et al.  CONCISE EUROCODE FOR THE DESIGN OF CONCRETE BUILDINGS. BASED ON BSI PUBLICATION DD ENV 1992-1-1: 1992. EUROCODE 2: DESIGN OF CONCRETE STRUCTURES. PART 1: GENERAL RULES AND RULES FOR BUILDINGS , 1993 .

[2]  Shi Yong-jiu.  Experimental Study on the Mechanical Properties of Rail Steel at low Temperature , 2006 .

[3]  Janet K. Pitman,et al.  Assessment of Undiscovered Oil and Gas in the Arctic , 2009, Science.

[4]  Xudong Qian,et al.  Numerical and parametric study of curved steel-concrete-steel sandwich composite beams under concentrated loading , 2016 .

[5]  F. S. Rostásy,et al.  Stress-strain-behaviour of concrete at extremely low temperature , 1980 .

[6]  V. Almazov,et al.  Bearing capacity of a reinforced concrete shell in an Arctic environment , 1982 .

[7]  Hui-jie Li.  EXPERIMENTAL RESEARCH ON THE PROPERTIES OF CONCRETE UNDER LOW-TEMPERATURE , 2011 .

[8]  Xudong Qian,et al.  Damage plasticity based numerical analysis on steel–concrete–steel sandwich shells used in the Arctic offshore structure , 2016 .

[9]  J. Xie,et al.  Experimental study on the axial-compression performance of concrete at cryogenic temperatures , 2014 .

[10]  Salah Kaci,et al.  Behavior of the reinforced concrete at cryogenic temperatures , 2007 .

[11]  Zhang Yuling.  Research on the Fatigue and Fracture Performance of Railway Steel Bridge under Low Temperature , 2008 .

[12]  J. Xie,et al.  Experimental studies on mechanical properties of steel reinforcements under cryogenic temperatures , 2017 .

[13]  Mark F. Green,et al.  Effects of low temperature on the static behaviour of reinforced concrete beams with temperature differentials , 2016 .

[14]  Z. Weiping.  Study on bending bearing capacity of reinforced concrete beams at super-low temperature , 2009 .

[15]  Neil A. Hoult,et al.  Effects of varying temperature on the performance of reinforced concrete , 2015 .

[16]  George C. Lee,et al.  MECHANICAL PROPERTIES OF CONCRETE AT LOW TEMPERATURE , 1988 .

[17]  Andrew Palmer,et al.  Arctic Offshore Engineering , 2012 .

[18]  Jeeho Lee,et al.  Plastic-Damage Model for Cyclic Loading of Concrete Structures , 1998 .