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(一)赵家堡西河大桥的震害分析海城地震时位于九度区的赵家堡西河大桥四个桥墩皆为锥形素混凝土,高7m.墩顶直径2.2米,底部直径2.73m(见图1).地震后,4号墩在墩帽下0.75m 处环裂,裂缝下混凝土剥落;3号墩在墩帽下2.3m 左右断裂,裂缝下混凝土劈开(参看照片1);1号墩在墩帽下3m 左右环裂,周围龟裂,支座锚栓全部破坏…….
(I) Analysis of the Seismic Hazards of the Zhaohe Fort Xihe Bridge During the Haicheng earthquake, the four piers of the Zhaojiapu Xihe Bridge in Jiuliu District are all conical plain concrete with a height of 7m and a pier diameter of 2.2m and a bottom diameter of 2.73m See Figure 1. After the earthquake, Pier 4 cracked at 0.75 m below the pier cap, and the concrete spalled under the pier. Pier 3 was fractured about 2.3 m below the pier cap, and the concrete was split under the fracture (see photo 1); Pier pier under the cap in about 3m ring cracked around the crack, bearing bolt all destroyed ... ....