| 摘要 |
A structural bearings comprises: a lower non-elastomeric load-bearing element (2); an upper non-elastomeric load-bearing element (3); and at least one load-bearing intermediate element (4) interposed between the upper and lower non-elastomeric elements; and wherein: the upper and lower non-elastomeric elements being rotatable relative to each other at least to a limited extent about a vertical axis X; the intermediate element or one of the intermediate elements is an elastomeric element unconfined at its periphery; and the upper and lower non-elastomeric elements are provided with respective side surfaces (6, 12) about said vertical axis which are mutually engageable to restrict relative lateral movement of the upper and lower non-elastomeric load-bearing elements while allowing the upper and lower non-elastomeric elements to rotate relative to each other about the vertical axis. Preferably the intermediate element or one of the intermediate elements and one of said upper and lower non-elastomeric load-bearing elements are provided with respective mutually engaging and relatively slidable surfaces (8, 11) extending about the vertical axis and the side surfaces of the upper and lower non-elastomeric load-bearing elements extend completely around the vertical axis whereby the intermediate element or said one intermediate element and the other of said non-elastomeric elements can rotate in relation to said one non-elastomeric element about the vertical axis, said one non-elastomeric element and the intermediate element or said one intermediate element sliding one upon the other. |
