拱坝侵彻损伤效应与安全控制(Ⅲ):坝体安全预警指标  

Penetrated damage effects and safety control of arch dam(Ⅲ):early warning index of dam body

作　　者：周祥森 徐青 陈胜宏[1] ZHOU Xiangsen;XU Qing;CHEN Shenghong(State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2023年第9期1033-1040,共8页Engineering Journal of Wuhan University

基　　金：国家自然科学基金重点项目(编号:51939008)。

摘　　要：在实现侵彻损伤拱坝拱梁分载算法并获得坝体极限承载力下限解的基础上,提出与之配套的安全预警指标。对于应力控制指标,以现行拱坝设计规范为依据,参考国内外拱坝工程常规应力控制标准,提出拱坝在侵彻损伤工况下应力控制的绝对指标与相对指标,并提出拱坝整体应力的3级预警体系;对于极限承载力控制指标,提出基于相对指标的拱坝极限承载力3级预警体系;最后,对某拱坝进行虚拟损伤工况下的应力与极限承载力分析,并根据本文提出的应力与极限承载力预警指标,进行预警信息的模拟发布。与之前的研究成果共同构建了“应力分载算法-极限承载力分析-坝体安全预警”平台,为拱坝在遭受侵彻破坏后的快速损伤效应评估与安全控制决策提供支撑。On the basis of realizing the algorithm of the trial load method and obtaining the lower limit solution of the ultimate bearing capacity for the arch dam subjected to penetrated damage,the corresponding early warning index is proposed.For stress control,based on the current design code of arch dam and the conventional stress control standard of arch dam projects at home and abroad,the absolute and relative stress control indices for the arch dam under the condition of penetrated damage are put forward,and a three-level early-warning system with regard to arch dam overall stress is further proposed.As for the ultimate bearing capacity control,a three-level early-warning system with regard to the relative index for the arch dam is proposed.Finally,the stress and ultimate bearing capacity of an arch dam under virtual penetrated-damage conditions are analyzed,and the early warning information is simulated and released according to the earlywarning index systems proposed in this paper.The outcomes of this paper and two previous papers published in this journal construct a platform of“trial load algorithm for stress-limit analysis for ultimate bearing capacityearly warning of dam body safety”to provide strong support for the fast damage evaluation and safety control decision of arch dam subjected to penetrated damage.

关 键 词：拱坝 侵彻损伤 应力 极限承载力 安全预警 

分 类 号：TV3[水利工程—水工结构工程]