高拱坝地震反应与抗震安全性评价

Earthquake response and earthquake-resistence safety evaluation for high arch dam

目前，抗震设计已成为高地震烈度区修建特高拱坝的控制性技术难点。“八五”期间结合我国近期将开发的重点工程──高２９２ｍ的小湾拱坝对抗震设防概率标准及抗震可靠度设计；拱坝坝体－地基－库水动力相互作用分析的现场试验验证；伸缩横缝对高拱坝强震反应的影响；及小湾坝址场地对地震动的影响等问题进行了抗震技术攻关研究。在完成上述基本理论和试验研究的基础上，对小湾拱坝进行了分析，得到了在考虑上述因素后的地震反应，并对小湾拱坝的抗震安全性作出评估。

At present, the earthquake-resistance design has become the key technical difficult point in the construction of extra-high arch Dam in the region with high earthquake intensity. During the Eighth-Five-Year Plan period,in combination with Xiaowan Arch Dam of 292 m high, a key project which will be built within recent years in China, the following earthquake-resistance technology subjects have been studied, that is, standards of earthquake-resistance design probability, earthquake-resistance reliability design, field test and verification of the interactions among arch dam body, foundation and reservoir water dynamic force;impact of Xiaowan dam site on earthquake. On basis of the above-mentioned basic theory and test, the analysis on Xiaowan arch dam has been conducted. The results have been gained based on considering the above factors. And the earthquake-resistance safety of the Xiaowan arch dam has been evaluated.