沉管隧道地震响应分析

文章采用田村重四郎和冈本舜三提出的沉埋隧道地震响应分析的数学模型,对南京长江越江隧道(沉管段)方案进行了地震响应的纵向受力分析。分析中采用了隧址处100年超越概率为2%的人工合成地震加速度,考虑了不同管段的联结方式和不同的计算参数,对初步设计中沉管段结构的安全性进行了论证,所提供的数据曾为设计单位所采纳[1]。

Seismic response analyses of an immersed tube tunnel

Mathematical model proposed by Tamura and Okamoto for the seismic analyses of immersed tube tunnels is applied to the seismic analyses in the longitudinal direction for the submerged section of Nanjing Yangtze River-crossing tunnel.In the analyses the artificially composed seismic accelerations with a 2% transcendental probability for 100 years is adopted with different joint forms of tube sections considered and different computing parameters adopted.The safety for the structure of submerged section in the conceptual design is evaluated according to the results of analyses.The data obtained were accepted by the design institute~().