| 摘要 |
<p>A method is described of prestressing structural members wherein there are a pair of longitudinal elements, a plurality of strut elements and a plurality of diagonal members. A plurality of joint connector means enable the strut elements and diagonal members to be interconnected rigidly together as an inner latticework, and the latter to the longitudinal elements. The inner latticework is initially left freely moveable relative to the longitudinal elements, and a prestressing tensile load applied only to said latticework. While the prestressing load is being applied, the longitudinal elements are rigidly secured to the inner latticework. When the prestressing load is then removed, the diagonal members remain in tension, the strut elements remain in compression and the longitudinal elements acquire a compressive load. The prestressing load should not generate any moments or rotational forces at the junctions of diagonals with the strut and longitudinal elements that have not been accounted for. Preferably, the prestressing load is applied to the latticework in a manner so as to be colinear with the longitudinal elements.</p> |
