| 摘要 |
A tension member is provided for use in erecting structures that has an elongated body with an outer wall defining an inner space. A tendon extends from one end of the body to the other within the defined inner space. The tendon has a tension force placed upon it. Concrete material is added to the inner space to form a concrete holding member which surrounds the tendon and which is in turn surrounded by the outer wall. The concrete holding member thus contacts the tendon and, upon curing, maintains the tension force placed upon the tendon. The tension member is placed in compression when the tension force is released from the tendon. In another aspect of the present invention, an arch member is provided for use as a compression member in a bridge. The arch member has an elongated arcuate body with an outer wall defining an inner space. The inner space of the body is filled with a concrete so that the body provides support for the concrete. |
