Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cyclic tests on high-strength prestressed concrete frames
Prestressed concrete frames are commonly used in bridge design. However, little is known about their behavior under reversed cyclic loads, particularly when the frame is made of high strength concrete (HSC), and is subjected to severe earthquakes. Most bridge codes do not provide the required design guidelines. The rigid frame bridge is one of the most widely used types of highway bridges in the world. Results from small-scale models of eight high-strength prestressed concrete frames, tested under various displacement histories simulating earthquake forces are presented. The primary curves (horizontal force-displacement relationships) and the hysteretic loops are determined experimentally. Concrete strength is approximately between 50 and 60 mPa, and effective prestress is 50 % of the ultimate strength of the prestressing steel. It is found that the effect of displacement history on the mechanical behavior is significant because the entire shape of the hysteretic loops is different and the prestressed concrete frames made of high-strength concrete with a slump of 25 cm may have at least a ductility factor of 8.0.
Cyclic tests on high-strength prestressed concrete frames
Prestressed concrete frames are commonly used in bridge design. However, little is known about their behavior under reversed cyclic loads, particularly when the frame is made of high strength concrete (HSC), and is subjected to severe earthquakes. Most bridge codes do not provide the required design guidelines. The rigid frame bridge is one of the most widely used types of highway bridges in the world. Results from small-scale models of eight high-strength prestressed concrete frames, tested under various displacement histories simulating earthquake forces are presented. The primary curves (horizontal force-displacement relationships) and the hysteretic loops are determined experimentally. Concrete strength is approximately between 50 and 60 mPa, and effective prestress is 50 % of the ultimate strength of the prestressing steel. It is found that the effect of displacement history on the mechanical behavior is significant because the entire shape of the hysteretic loops is different and the prestressed concrete frames made of high-strength concrete with a slump of 25 cm may have at least a ductility factor of 8.0.
Cyclic tests on high-strength prestressed concrete frames
Zyklische Belastungsversuche von hochfesten Spannbeton-Rahmen
Mo, Y.L. (Autor:in) / Hwang, W.L. (Autor:in)
Journal of Testing and Evaluation ; 24 ; 168-180
1996
13 Seiten, 13 Bilder, 3 Tabellen, 20 Quellen
Aufsatz (Zeitschrift)
Englisch
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