Shake table tests on prestressed concrete frames (original) (raw)
1998, Materials and Structures
Results from small scale models of prestressed concrete frames, tested by a shake table simulating earthquake forces are presented. The primary curves (horizontal force-displacement relationships) and the hysteretic loops are determined experimentally. Concrete strength is approximately between 32 and 84 MPa, and two types of effective prestresses are used, namely, 40 and 80 percent of the yielding stress of the prestressing bars. It is found that the effects of concrete strength and effective prestress on the ductility are significant because the ductility increases with increasing concrete strength and with decreasing effective prestress, and the prestressed concrete flames may have at least a ductility factor of 8.0. table vibrante capable de simuler les forces d' un tremblement de terre, sont pr&en-t& ci-apr&. Les courbes primaires (relations force-d~placements horizontales) ainsi que les boudes d'hyst&&is sont alors d~termi-n&s d'une mani&e expMmentale. La re'sistance du b~ton se situe approximativement entre 32 et 84 MPa, et deux types de pr&ontraintes effectives sont utilis&, a
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