香港青马大桥地区公路桥梁的抗震设防标准问题  

THE ASEISMIC CRITERION OF A HIGHWAY BRIDGE IN THE LANTAU FIXED CROSSING AREA

作　　者：李焯芬[1,2] 丁原章[1,2] 常宝琦 

机构地区：[1]香港大学土木及结构工程系 [2]广东省地震局

出　　处：《华南地震》1998年第1期75-83,共9页South China Journal of Seismology

摘　　要：应用桥梁震害的统计分析和概率预测等两种方法，确定了青马大桥地区新建公路桥梁的抗震设防标准。建议取５０年超越概率１０％的地震烈度，即地震烈度Ⅶ度作为抗震设防标准。文章指出，本区新建大型桥梁应注意活动断裂对工程的影响，建议在工程施工以前开展工程地震安全性评价。最后还指出，青马大桥应以抗强风验算并与地震作用相组合的方法来验算结构件的内力。The aseismic criterion of a highway bridge to be built in the Lautan fixed crossing area was determined by means of the statistical analysis and the probabilistic prediction in this paper.The seismic intensity over the next 50 years with a probability of exceedance of 10% in the area,i.e. seismic intensity Ⅶ,was proposed to be taken as the asismic criterion. It was also pointed out that the effect of an active fault on an engineering should be paid enough attention during the construction of a new and large bridge in the area.Therefore the seismic safety assessment of a bridge site should be carried out before the start of engineering struction.In this paper it was also pointed out that the inner force of the elements for the Tsing Ma bridge should be checked with a combination approach of seismic effect as well as wind load.

关 键 词：抗震设施 震害统计 概率预测 公路桥梁 桥梁 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U448.14[交通运输工程—道路与铁道工程]