| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel support movable only in a bridge axis direction normally and in case of an earthquake based on the seismic coefficient method and movable also in a right-angled direction to the bridge axis in case of an earthquake based on the ultimate horizontal strength method, and to provide a function separating type bridge supporting device jointly using the steel support and an elastic damper. SOLUTION: This steel support has a lower shoe 1 accommodating a rubber plate 15, an intermediate plate 17, and the like in a recessed part 3 provided at the center part, and fixed to a base plate 20 by bolts 41 directly or through a fixing member; lower shoe guide blocks 33a, 33b provided on the bridge axis direction side of the base plate 20 to guide the lower shoe 1; and an upper shoe 8 movably in the bridge axis direction held on to the lower shoe 1 through a sliding plate 18. The bolts 41 for fixing the lower shoe 1 to the base plate 20 directly or through the fixing member are set to such strength as to be broken when horizontal load exceeding horizontal load in case of the earthquake based on the seismic coefficient method is applied. |
