【摘 要】
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2.1946年到现在 从1948年歧阜的忠节桥(平衡桁肋系杆拱)开始建设长大跨度桥梁。1954年出现了也使拱肋承受弯曲的加劲拱,如罗杰氏梁的形式。1965年将刚性梁柔性拱的吊杆做成
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2.1946年到现在 从1948年歧阜的忠节桥(平衡桁肋系杆拱)开始建设长大跨度桥梁。1954年出现了也使拱肋承受弯曲的加劲拱,如罗杰氏梁的形式。1965年将刚性梁柔性拱的吊杆做成了倾斜的桁架拱桥。从1968年出现了在罗杰氏梁的吊杆处将缆索斜向布置的加劲式拱桥,这样也能架设跨度近300米的梁。拱桥的矢跨比随
2. From 1946 till now, the construction of long-span bridges began with the loyalty bridge (bracing tied arch rib arch) of Gifu in 1948. In 1954 there was also a stiffening arch that also bends the arch, such as Rogers’ beams. In 1965 the rigid beam flexible arch boom made of tilted truss arch bridge. From 1968 there was a stiffening arch bridge that diagonally arranged the ropes at Rod Roberts’ girder so that a beam spanning nearly 300 meters could be erected. The arch-span ratio of the arch bridge
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