| 摘要 |
<p>A method of applying , prestress to a structural member resisting deflection such as a beam or a girder. used for a structure or a bridge by a post-tensioning method to apply the optimum prestress to the structural member resisting deflection by applying not a compressive force but deflection to the structural member and to apply a large moment with a low tensile force by using a principle that not a distance between the center of the cross-section of the structural member and a tension member but a distance between a compression member and the tension member is eccentric. Using this method, a prestressed concrete beam includes: a tension member of high strength passing the tension zone of the structural member subject to deflection in a state of the tension member is not attached to the structural through a sheath pipe; compression members passing the compression zone; and an anchoring device for connecting the compression members and the tension member, so that the compression members of high strength, not the structural member,. receive a compressive force, a reaction force of a tensile force, by tensioning and anchoring the tension member, supported by the anchoring device. By ;using such a method alone or using such a method in combination with the conventional prestressing method using only tension members, compressed prestress in the tension zone and tensile prestress in the compression zone can be easily and right applied to a critical section of the structural member subject to deflection.</p> |
