基于Vague集的地下洞室地震安全评价

针对地下洞室群安全评价研究相对匮乏,且研究中大多针对应力或位移等单一指标开展安全评价,其结果具有明显局限性的问题,基于集成强度折减法、粒子群优化算法、投影寻踪法及Vague集的集对分析模型等方法,以结构的竖向位移、水平位移、加速度及压应力等多个动态响应参量作为地下洞室地震安全评价的关键指标,提出了适用于大型地下洞室群多指标的地震安全评价方法体系。以某工程为例进行了大型水电工程地下洞室群地震安全评价研究,结果表明所选地下洞室的3个断面均处于安全稳定性较好的评价等级,验证了地下洞室群地震安全评价模型的有效性。

Seismic safety evaluation of underground cavern with Vague set

Up to now, few studies have been performed to evaluate the safety of underground cavern group under earthquake, and most of the researches are limited in a single factor such as stress or displacement. Based on the integrating strength reduction method, particle swarm optimization method, projection pursuit method and set pair analysis model with Vague set, an seismic safety evaluation model with multiple parameters is proposed for huge underground cavern group. In this model, several dynamic response parameters such as vertical displacement, horizontal displacement, acceleration, and compressive stress are taken as the key factors to evaluate the seismic safety of underground caverns. A multi-index seismic safety assessment method system is hence proposed for large underground cavern group in this paper. A case study is performed to evaluate the seismic safety of the underground cavern groups of a huge hydro-power project, the results show that the selected three sections of the underground caverns are all in a safe and steady rating, which in turn demonstrate the effectiveness of the proposed model.