Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultimate strength behavior of prestressed concrete beams at cryogenic temperatures
Abstract This paper investigates the ultimate strength behaviours of the unbonded prestressed concrete (PC) beams at cryogenic temperatures that aims to promote the applications of PC structures in cryogenic environments. Nineteen unbonded PC beams with different tension control stresses (0.4, 0.6, 0.75f ptk) were tested at 20, −40, −70 and −100 °C. The structural performances of the unbonded prestressed reinforced concrete (RC) beams under cryogenic temperature were reported that included general load–deflection behaviours, ultimate resistances, and failure modes. The test results indicated that at cryogenic temperatures, the plane section assumption for the prestressed RC beams under bending still worked, and the appearance of cracks can still be delayed by prestressing. The resistances corresponding to crack initiation, the yield of the non-prestressed tensile reinforcements and the ultimate failure of the beams all increased linearly with the decrease of the temperature. The stiffness of specimens also increased as the temperature dropped. Analytical methods for predicting the resistance corresponding to the crack initiation and the ultimate resistance at low temperatures were developed and compared with the test results.
Ultimate strength behavior of prestressed concrete beams at cryogenic temperatures
Abstract This paper investigates the ultimate strength behaviours of the unbonded prestressed concrete (PC) beams at cryogenic temperatures that aims to promote the applications of PC structures in cryogenic environments. Nineteen unbonded PC beams with different tension control stresses (0.4, 0.6, 0.75f ptk) were tested at 20, −40, −70 and −100 °C. The structural performances of the unbonded prestressed reinforced concrete (RC) beams under cryogenic temperature were reported that included general load–deflection behaviours, ultimate resistances, and failure modes. The test results indicated that at cryogenic temperatures, the plane section assumption for the prestressed RC beams under bending still worked, and the appearance of cracks can still be delayed by prestressing. The resistances corresponding to crack initiation, the yield of the non-prestressed tensile reinforcements and the ultimate failure of the beams all increased linearly with the decrease of the temperature. The stiffness of specimens also increased as the temperature dropped. Analytical methods for predicting the resistance corresponding to the crack initiation and the ultimate resistance at low temperatures were developed and compared with the test results.
Ultimate strength behavior of prestressed concrete beams at cryogenic temperatures
Xie, Jian (Autor:in) / Chen, Xi (Autor:in) / Yan, Jia-Bao (Autor:in) / Lei, Guangcheng (Autor:in) / Zhu, Limin (Autor:in)
Materials and Structures ; 50 ; 1-13
04.10.2016
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Ultimate strength behavior of prestressed concrete beams at cryogenic temperatures
| Online Contents | 2016
Ultimate strength behavior of prestressed concrete beams at cryogenic temperatures
| Online Contents | 2017
Ultimate strength of prestressed concrete beams
| Engineering Index Backfile | 1955
Ultimate bending strength of prestressed concrete continuous beams
| Engineering Index Backfile | 1957
Design of prestressed concrete beams for ultimate strength
| Engineering Index Backfile | 1956