基于弹塑性谱位移的钢筋混凝土框架概率地震需求分析

PDF(3002 KB)

振动与冲击 ›› 2018, Vol. 37 ›› Issue (16) : 162-171.

论文

徐超，耿飞，温增平

作者信息 +

Probabilistic seismic demand analysis of reinforced concrete frames based on inelastic spectra displacement#br#

XU Chao,GENG Fei,WEN Zengping

Author information +

文章历史 +

摘要

地震动参数的选择是影响概率地震需求分析中输入地震动的选择和调整以及分析结果可靠性的重要因素。开展概率地震需求分析时，常采用的地震动参数主要有峰值加速度和对应于结构基本周期的加速度反应谱值。但是，一方面，结构响应与地震动峰值加速度的相关性较差。另一方面，对应于结构基本周期的加速度反应谱值不能体现结构基本周期之外的地震动频率成分对结构地震反应的影响。以弹塑性谱位移作为地震动参数开展RC框架结构的概率地震需求分析研究。基于模态 Pushover分析提出了弹塑性谱位移的计算方法；借助云图法和改进的增量动力法开展典型框架结构的概率地震需求分析，基于回归拟合及残差分析研究了弹塑性谱位移的充分有效性，并与弹性谱位移进行了比较。研究表明：弹塑性谱位移能够反映大于结构基本周期的地震动频率成分对结构弹塑性地震反应的影响，改善了弹性谱位移仅反映单一地震动频率成分对结构反应影响的不足，可以较合理地揭示由于结构软化导致自振周期延长后地震动的破坏作用。

Abstract

Ground motion intensity measurement is an important factor affecting the input ground motions selection and the reliability of probabilistic seismic demand analysis results.Peak ground acceleration and acceleration spectrum values corresponding to the fundamental period of a structure are commonly used measures of ground motion intensity.But using peak ground acceleration leads to a large dispersion of structural responses, and an acceleration spectrum value corresponding to a structure’s fundamental period cannot reflect the impact of multiple ground motion frequency components on structural response.In this study, inelastic spectral displacement was used as an alternative intensity measurement to characterize the ground motion damage potential, and inelastic spectral displacement-based probabilistic seismic demand analysis was performed.The inelastic spectral displacement calculation method was presented based on modal pushover analysis.Probability seismic demand analyses of typical RC frames were performed by means of cloud analysis and advanced incremental dynamic analysis.The sufficiency and efficiency of inelastic spectral displacement were investigated by means of regression and residual analyses and compared with elastic spectral displacement.The study shows that inelastic spectral displacement characterizes the impact of frequency components with periods larger than the fundamental period on inelastic structural response, improving the deficiency of elastic spectra displacement.The damage potential of ground motion on structures with fundamental period prolonging caused by structural softening can be caught by inelastic spectral displacement.

关键词

概率地震需求分析 / 地震动强度参数 / 弹塑性谱位移 / 非线性动力时程分析

引用本文

EndNote

Ris (Procite)

Bibtex

导出引用

徐超，耿飞，温增平. 基于弹塑性谱位移的钢筋混凝土框架概率地震需求分析[J]. 振动与冲击, 2018, 37(16): 162-171

XU Chao,GENG Fei,WEN Zengping. Probabilistic seismic demand analysis of reinforced concrete frames based on inelastic spectra displacement#br#[J]. Journal of Vibration and Shock, 2018, 37(16): 162-171

参考文献

[1] 刘恢先.论地震力 [J].土木工程学报,1958,5(2):86-106.
LIU Hui-xian. Seismic loads [J]. China Civil Engineering Journal, 1958, 5(2): 86-106.
[2] Hwang HHM, Jaw JW. Probabilistic damage analysis of structures [J]. ASCE Journal of Structural Engineering, 1990, 116(7): 1992-2007.
[3] Singhal A, Kiremidjian AS. Methodfor probabilistic evaluation of seismic structural damage [J]. ASCE Journal of Structural Engineering, 1996, 122(12): 1459-1467.
[4] Singhal A, Kiremidjian AS. Bayesian updating of fragilities with application to RC frames [J]. ASCE Journal of Structural Engineering, 1998, 124(8): 922-929.
[5] Song JL, Ellingwood BR. Seismic reliability of special moment steel frames with welded connections [J]. ASCE Journal of Structural Engineering, 1999, 125(4): 372-384.
[6] Sasani M, Der Kiureghian A. Seismic fragility of RC structural walls: Displacement approach [J]. ASCE Jourηal of Structural Engineering, 2001, 127(2): 219-228.
[7] Sasani M, DerKiureghianA,Bertero VV. Seismic fragility of short period reinforced concrete structural walls under near-source ground motions [J]. Structural Safety, 2002, 24(2-4): 123-138.
[8] Ellingwood BR, CelikOC, Kinali K.Fragility assessment of building structural systems in Mid-America [J]. Earthquake Engineering and Structural Dynamics, 2007, 36(3):1935-1952.
[9] Wu D, Tesfamariam S, StiemerSF, Qin D. Seismic fragility assessment of RC frame structure designed accordingto modern Chinese code for seismic design of buildings [J]. Earthquake Engineering and Engineering Vibration, 2012,11(3):331-342.
[10] ElenasA.Correlation between seismic acceleration parameters and overall structural damage indices of buildings [J]. Soil Dynamics and Earthquake Engineering, 2000,20:93-100.
[11] Gardoni P, Mosalam KM, Der Kiureghian A. Probabilistic seismic demand models and fragility estimates for RC bridges [J]. Journal of Earthquake Engineering, 2003, 7(Special Issue 1):79-106.
[12] Schotanus MIJ, Franchin P, Lupoi A, Pinto PE. Seismic fragility analysis of 3D structures [J]. Structural Safety, 2004, 26 (4):421-441.
[13] Shome N, Cornell CA, Bazzurro P, et al. Earthquakes, records, and nonlinear responses [J]. Earthquake Spectra, 1998, 14(3):469-500.
[14] Shome N. Probabilistic seismic demand analysis of nonlinear structures. [D]. Stanford: Stanford University,1999.
[15] EllingwoodBR.Earthquake risk assessment of building structures [J]. Reliability Engineering and System Safety, 2001, 74: 251-262.
[16] Kafali C, Grigoriu M. Seismic fragility analysis [C]. Proceedings of the Ninth ASCE Specialty Conference on Probabilistic Mechanics and Structural Reliability (PMC2004). Albuquerque: NM, 2004. 136-143.
[17] 韩建平,陈继强,闫青,等. 考虑谱形影响的地震动强度指标研究进展[J]. 工程力学, 2015,32(10):9-17.
HAN Jian-ping, CHEN Ji-qiang, YAN Qing, et al. State of the art of ground motion intensity measures accounting for the influence of spectral shape [J]. Engineering Mechanics, 2015, 32(10): 9-17.
[18] 叶列平,马千里,缪志伟. 结构抗震分析用地震动强度指标的研究[J]. 地震工程与工程震动,2009,29(4):9-22.
YE Lie-ping, MA Qian-li, MIAO Zhi-wei. Study on earthquake intensities for seismic analysis of structures [J]. Earthquake Engineering & Engineering Vibration, 2009, 29(4), 9-22.
[19] 陈健云,李静,韩进财,等.地震动强度指标与框架结构响应的相关性研究[J].振动与冲击,2017,36(3):105-112.
CHEN Jian-yun, Li Jing, HAN Jin-cai, et al. Correlation between ground motion intensity indexes and seismic responses of frame structure [J]. Journal of Vibration and Shock, 2017,36(3):105-112.
[20] 李雪红,李晔暄,吴迪,等.地震动强度指标与结构地震响应的相关性研究[J].振动与冲击,2014,33(23):184-189.
LI Xue-hong, LI Ye-xuan, WU Di, et al. Correlation between ground motion intensity and structural seismic response [J]. Journal of Vibration and Shock,2014, 33(23): 184-189.
[21] Luco N. Probabilistic seismic demand analysis, SMRFconnection fractures, and near-source effects [D].Stanford: Stanford University, 2001.
[22] Chopra AK, Goel RK. A modalpushoveranalysisproceduretoestimateseismicdemandsforunsymmetric-planbuildings [J]. Earthquake Engineering and Structural Dynamics, 2004,33(8):903-927.
[23] Baker JW. Vector-valued ground motion intensity measures for probabilistic seismic demand analysis [D].Stanford: Stanford University, 2005.