基于DCR方法的沉砂池右边墙抗震安全评价
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摘要
本文基于美国陆军工程师兵团EM 1110-2-6053中提出的水工建筑物抗震性能需求能力比(DCR,demand to capacity ratio)评价方法,对某水电站沉砂池综合抗震性能进行了评价。结果表明,在OBE下,沉砂池右边墙的抗剪性能、抗弯性能、抗滑动稳定和抗倾覆稳定性均能满足设计要求。而在MDE下,尽管沉砂池截面抗弯性能良好,但其右边墙的抗剪性能难以满足设计要求,需要对结构断面或配筋进行调整;且其可能发生滑动失稳和倾覆失稳破坏,需要进一步开展非线性动力分析。
Based on the Demand to Capacity Ratio(DCR) approach for seismic performance evaluation of hydraulic structures in EM 1110-2-6053 proposed by US Army Corps of Engineers(USACE),seismic performance of a desanding basin right wall is comprehensively evaluated in this paper. The results show that during the operational basis earthquake(OBE),the shear behavior,flexure behavior,sliding stability and overturning stability can meet the design requirement. During the maximum design earthquake(MDE),although the desanding basin shows good flexure behavior,the shear behavior can hardly meet the design requirement. The cross section or the reinforcement of the structure should be adjusted. Moreover,the sliding instability and overturning instability could occur,and the nonlinear dynamic analysis is needed for the further study.
Based on the Demand to Capacity Ratio(DCR) approach for seismic performance evaluation of hydraulic structures in EM 1110-2-6053 proposed by US Army Corps of Engineers(USACE),seismic performance of a desanding basin right wall is comprehensively evaluated in this paper. The results show that during the operational basis earthquake(OBE),the shear behavior,flexure behavior,sliding stability and overturning stability can meet the design requirement. During the maximum design earthquake(MDE),although the desanding basin shows good flexure behavior,the shear behavior can hardly meet the design requirement. The cross section or the reinforcement of the structure should be adjusted. Moreover,the sliding instability and overturning instability could occur,and the nonlinear dynamic analysis is needed for the further study.
引文
[1] U.S. Army Corps of Engineers. Earthquake design and evaluation of civil works projects:EM 1110-2-1806[S].1995.
[2] U.S. Army Corps of Engineers. Time-history dynamic analysis of concrete hydraulic structures:EM 1110-2-6051[S]. 2003.
[3] U.S. Army Corps of Engineers.Earthquake design and evaluation of concrete hydraulic structures:EM1110-2-6053[S]. 2007.
[4] GHANAAT Y. Seismic performance and damage criteria for concrete dams[C]//Proceedings of the 3rd US-Japan Workshop on Advanced Research on Earthquake Engineering for Dams. San Diego,2002.
[5] GHANAAT Y. Failure modes approach to safety evaluation of dams[C]//Proceeding of 13th World Conference on Earthquake Engineering. Vancouver,Canada,2004.
[6] ARDEBILI M A H,MIRZABOZORG H. Seismic performance evaluation and analysis of Major arch dams considering material and joint nonlinearity effects[J]. Isrn Civil Engineering,2012,2012(2):75-83.
[7] ARDEBILI M A H,MIRZABOZORG H. Effects of near-fault ground motions in seismic performance evaluation of a symmetric arch dam[J]. Soil Mechanics and Foundation Engineering,2012,49(5):192-199.
[8] ARDEBILI M A H,MIRZABOZORG H,GHASEMI A. Strain-based seismic failure evaluation of coupled damreservoir-foundation system[J]. Coupled Systems Mechanics,2013,2(1):85-110.
[9] HESHMATI M,ARDEBILI M A H,MIRZABOZORG H,et al. Are there any differences in seismic performance evaluation criteria for concrete arch dams?[J]. Civil Engineering Infrastructures Journal,2013,46(2):233-240.
[10] SEVIM B. The effect of material properties on the seismic performance of arch dams[J]. Nat Hazards Earth Syst Sci,2011,11(8):2253-2261.
[11] WANG G,ZHANG S,WANG C,et al. Seismic performance evaluation of dam-reservoir-foundation systems to near-fault ground motions[J]. Natural Hazards,2014,72(2):651-674.
[12] ALEMBAGHERI M. Earthquake damage estimation of concrete gravity dams using linear analysis and empirical failure criteria[J]. Soil Dynamics&Earthquake Engineering,2016,90:327-339.
[13]马怀发,张坤,王立涛.混凝土坝抗震安全评价指标和方法研究[J].水利水电技术,2017,48(5):110-119.
[14] U.S. Army Corps of Engineers. Retaining and flood walls:EM1110-2-2502[S]. 1989.
[15] U.S. Army Corps of Engineers. Strength Design for Reinforced-Concrete Hydraulic Structures:EM1110-2-2104[S]. 1992.
[2] U.S. Army Corps of Engineers. Time-history dynamic analysis of concrete hydraulic structures:EM 1110-2-6051[S]. 2003.
[3] U.S. Army Corps of Engineers.Earthquake design and evaluation of concrete hydraulic structures:EM1110-2-6053[S]. 2007.
[4] GHANAAT Y. Seismic performance and damage criteria for concrete dams[C]//Proceedings of the 3rd US-Japan Workshop on Advanced Research on Earthquake Engineering for Dams. San Diego,2002.
[5] GHANAAT Y. Failure modes approach to safety evaluation of dams[C]//Proceeding of 13th World Conference on Earthquake Engineering. Vancouver,Canada,2004.
[6] ARDEBILI M A H,MIRZABOZORG H. Seismic performance evaluation and analysis of Major arch dams considering material and joint nonlinearity effects[J]. Isrn Civil Engineering,2012,2012(2):75-83.
[7] ARDEBILI M A H,MIRZABOZORG H. Effects of near-fault ground motions in seismic performance evaluation of a symmetric arch dam[J]. Soil Mechanics and Foundation Engineering,2012,49(5):192-199.
[8] ARDEBILI M A H,MIRZABOZORG H,GHASEMI A. Strain-based seismic failure evaluation of coupled damreservoir-foundation system[J]. Coupled Systems Mechanics,2013,2(1):85-110.
[9] HESHMATI M,ARDEBILI M A H,MIRZABOZORG H,et al. Are there any differences in seismic performance evaluation criteria for concrete arch dams?[J]. Civil Engineering Infrastructures Journal,2013,46(2):233-240.
[10] SEVIM B. The effect of material properties on the seismic performance of arch dams[J]. Nat Hazards Earth Syst Sci,2011,11(8):2253-2261.
[11] WANG G,ZHANG S,WANG C,et al. Seismic performance evaluation of dam-reservoir-foundation systems to near-fault ground motions[J]. Natural Hazards,2014,72(2):651-674.
[12] ALEMBAGHERI M. Earthquake damage estimation of concrete gravity dams using linear analysis and empirical failure criteria[J]. Soil Dynamics&Earthquake Engineering,2016,90:327-339.
[13]马怀发,张坤,王立涛.混凝土坝抗震安全评价指标和方法研究[J].水利水电技术,2017,48(5):110-119.
[14] U.S. Army Corps of Engineers. Retaining and flood walls:EM1110-2-2502[S]. 1989.
[15] U.S. Army Corps of Engineers. Strength Design for Reinforced-Concrete Hydraulic Structures:EM1110-2-2104[S]. 1992.