桥梁群桩基础抗震能力值灵敏性分析
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摘要
探索影响桥梁高桩承台群桩基础抗震能力值的关键因素,在OpenSees平台下,对位于黏土中的高桩承台群桩基础建立非线性有限元模型,采用二阶中心差分法进行灵敏性分析.结果表明,群桩基础抗震能力值的各衡量指标,对混凝土抗压屈服强度的反应灵敏性较小,对钢筋抗拉屈服强度和土体黏聚力的反应灵敏性较大,对桩体核心混凝土截面积的反应灵敏性较平稳;差分步长取10-2倍均值是合理的.进一步的群桩基础动力可靠度分析要重点考虑钢筋抗拉屈服强度和土体黏聚力对系统失效概率的影响.
To explore the key parameters controlling the antiseismic capacity(or supply)of the high-rise pile cap foundation,a finite element model for such foundation lay in the uniform clay was built in the OpenSees finite element framework,and elastic-plastic static analyses were performed on the model.Meanwhile sensitivity analysis was performed on the model using second-order central difference method.The results of these analyses indicate that among some indices of the anti-seismic capacity of the high-rise pile cap foundations,the response sensitivity for the compressive strength of concrete is small,the response sensitivity for the tensile strength of reinforcements and the soil cohesive force are large,the response sensitivity for the core concrete section area is stable,and the time inerval of the finite difference taken as 10-2 order is reasonable.For the further dynamic reliability analysis of pile cap foundation,the tensile strength of reinforcements and the soil cohesive force should be treated as the important parameters affecting the system failure probability.
To explore the key parameters controlling the antiseismic capacity(or supply)of the high-rise pile cap foundation,a finite element model for such foundation lay in the uniform clay was built in the OpenSees finite element framework,and elastic-plastic static analyses were performed on the model.Meanwhile sensitivity analysis was performed on the model using second-order central difference method.The results of these analyses indicate that among some indices of the anti-seismic capacity of the high-rise pile cap foundations,the response sensitivity for the compressive strength of concrete is small,the response sensitivity for the tensile strength of reinforcements and the soil cohesive force are large,the response sensitivity for the core concrete section area is stable,and the time inerval of the finite difference taken as 10-2 order is reasonable.For the further dynamic reliability analysis of pile cap foundation,the tensile strength of reinforcements and the soil cohesive force should be treated as the important parameters affecting the system failure probability.
引文
[1]Hafez D H,Budkowska B B.侧向循环加载下位于非匀质土层中顶部固结的群桩基础的性能-分布参数的灵敏性分析[C]//第17届国际近海和极地工程会议文集.里斯本:国际近海和极地工程师协会,2007:1388-1395.(英文版)
[2]De Cock F A.桩体荷载变形行为的灵敏性和认识[C]//钻孔桩深基础会议文集.根特:CRC出版社,2009:23-44.(英文版)
[3]Xiao X C,Chi S C,Gao L,等.在侧向地震荷载下的桩土动力相互作用的简化计算方法和灵敏性分析[C]//建筑计算进展会议文集.香港:艾森威尔科学出版社,2002:771-778.(英文版)
[4]Kleiber M,Antunez H,Hien T D,等.非线性力学的参数灵敏性[M].纽约:威利出版社,1997:59-89.(英文版)
[5]Behrouz Asgarian,Mohammad Lesani.采用考虑纤维单元的pushover方法对近海导管架平台进行桩土结构相互作用研究[J].钢结构构造研究,2009(65):209-218.(英文版)
[6]管民生,杜宏彪,姜晶,等.不同连梁形式联肢剪力墙的静力弹塑性分析[J].深圳大学学报理工版,2009,26(4):376-381.
[7]OpenSees开发团队.地震工程模拟的开放系统[EB/OL].http://opensees.berkeley.edu/(英文版)
[8]Spacone E,Filippou F C,Taucer F F.使用纤维梁柱模型的钢筋混凝土框架非线性分析:第1部分计算公式[J].地震工程与结构动力学,1996,25:711-725.(英文版)
[9]Taucer F,Spacone E,Filippou F C.一种用于钢筋混凝土结构地震响应分析的纤维梁柱单元[R].UCB/EE-RC-91/17,加利福尼亚州:加州大学,1991.(英文版)
[10]Filippou F C,Popov E P,Bertero V V.黏结退化效应对钢筋混凝土连接点的滞回行为的影响[R].UCB/EERC-83/19,加利福尼亚州:加州大学,1983.(英文版)
[11]Boulanger W Ross,Curras J Christina,Kutter L Bruce,等.地震作用下桩土结构相互作用的试验与分析[J].岩土技术与岩土环境工程,1999,125(9):750-759.(英文版)
[12]Matlock.软黏土中侧向受荷桩的设计相关性[C]//第2届近海技术年会文集.休斯顿:艾森威尔科学出版社,1970:577-594.(英文版)
[13]Mokwa R L.承台对侧向荷载的抗力作用调查[D].黑堡市:维吉利亚工学院,1999.(英文版)
[14]Michael HScott,Terje Haukaas.参数更新和有限元反应灵敏性分析软件框架[J].土木工程计算,2008,22(5):281-291.(英文版)
[1]Hafez D H,Budkowska B B.Performance of fixed head pile group embedded in non-homogeneous soil subjected to lateral cyclic loading-Distributed parameter sensitivity analy-sis[C]//Proceedings of the17th International Offshore and Polar Engineering Conference.Lisbon:International Society Offshore&Polar Engineers,2007:1388-1395.
[2]De Cock F A.Sense and sensitivity of pile load-deformation behaviour[C]//Deep Foundations on Bored and Auger Piles Proceedings.Ghent:CRC Press,2009:23-44.
[3]Xiao X C,Chi S C,Gao L,et al.Simplified method and parametric sensitivity analysis for soil-pile dynamic interac-tion under lateral seismic loading[C]//Advances in Building Technology Proceedings.Hong Kong:Elsevier Science,2002:771-778.
[4]Kleiber M,Antunez H,Hien TD,et al.Parameter Sen-sitivity in Nonlinear Mechanics[M].New York:Wiley,1997:59-89.
[5]Behrouz Asgarian,Mohammad Lesani.Pile-soil-structure interaction in pushover analysis of jacket offshore platforms using fiber elements[J].Journal of Constructional Steel Research,2009(65):209-218.
[6]GUAN Min-sheng,DU Hong-biao,JIANG Jing,et al.Pushover analysis on coupled shear wall with different pat-terns of coupling beam[J].Journal of Shenzhen University Science and Engineering,2009,26(4):376-381.(in Chinese)
[7]OpenSees Development Team.Open system for earthquake engineering simualtion[EB/OL].http://opensees.berke-ley.edu/
[8]Spacone E,Filippou F C,Taucer F F.Fiber beam-column model for nonlinear analysis of R/C frames:part I formula-tion[J].Earthquake Engineering and Structural Dynamics,1996,25:711-725.
[9]Taucer F,Spacone E,Filippou F C.Afiber beam-column element for seismic response analysis of reinforced concrete structures[R].UCB/EERC-91/17,California:Universi-ty of California,1991.
[10]Filippou F C,Popov E P,Bertero V V.Effects of bond deterioration on hysteretic behavior of reinforced concrete joints[R].UCB/EERC-83/19,California:University of California,1983.
[11]Boulanger W Ross,Curras J Christina,Kutter L Bruce,et al.Seismic soil-pile-structure interaction experiments and analyses[J].Journal of Geotechnical and Geoenvir-onmental Engineering,1999,125(9):750-759.
[12]Matlock.Correlations for design of laterally loaded piles in soft clay[C]//Proc Annu Offshore Technol Conf.Hous-ton:Elsevier Science,1970:577-594.
[13]Mokwa R L.Investigation of the Resistance of Pile Caps to Lateral Loading[D].Blacksburg:Virginia Polytechnic Institute,1999.
[14]Michael H Scott,Terje Haukaas.Software framework for parameter updating and finite-element response sensitivity analysis[J].Journal of Computing in Civil Engineering,2008,22(5):281-291.
[2]De Cock F A.桩体荷载变形行为的灵敏性和认识[C]//钻孔桩深基础会议文集.根特:CRC出版社,2009:23-44.(英文版)
[3]Xiao X C,Chi S C,Gao L,等.在侧向地震荷载下的桩土动力相互作用的简化计算方法和灵敏性分析[C]//建筑计算进展会议文集.香港:艾森威尔科学出版社,2002:771-778.(英文版)
[4]Kleiber M,Antunez H,Hien T D,等.非线性力学的参数灵敏性[M].纽约:威利出版社,1997:59-89.(英文版)
[5]Behrouz Asgarian,Mohammad Lesani.采用考虑纤维单元的pushover方法对近海导管架平台进行桩土结构相互作用研究[J].钢结构构造研究,2009(65):209-218.(英文版)
[6]管民生,杜宏彪,姜晶,等.不同连梁形式联肢剪力墙的静力弹塑性分析[J].深圳大学学报理工版,2009,26(4):376-381.
[7]OpenSees开发团队.地震工程模拟的开放系统[EB/OL].http://opensees.berkeley.edu/(英文版)
[8]Spacone E,Filippou F C,Taucer F F.使用纤维梁柱模型的钢筋混凝土框架非线性分析:第1部分计算公式[J].地震工程与结构动力学,1996,25:711-725.(英文版)
[9]Taucer F,Spacone E,Filippou F C.一种用于钢筋混凝土结构地震响应分析的纤维梁柱单元[R].UCB/EE-RC-91/17,加利福尼亚州:加州大学,1991.(英文版)
[10]Filippou F C,Popov E P,Bertero V V.黏结退化效应对钢筋混凝土连接点的滞回行为的影响[R].UCB/EERC-83/19,加利福尼亚州:加州大学,1983.(英文版)
[11]Boulanger W Ross,Curras J Christina,Kutter L Bruce,等.地震作用下桩土结构相互作用的试验与分析[J].岩土技术与岩土环境工程,1999,125(9):750-759.(英文版)
[12]Matlock.软黏土中侧向受荷桩的设计相关性[C]//第2届近海技术年会文集.休斯顿:艾森威尔科学出版社,1970:577-594.(英文版)
[13]Mokwa R L.承台对侧向荷载的抗力作用调查[D].黑堡市:维吉利亚工学院,1999.(英文版)
[14]Michael HScott,Terje Haukaas.参数更新和有限元反应灵敏性分析软件框架[J].土木工程计算,2008,22(5):281-291.(英文版)
[1]Hafez D H,Budkowska B B.Performance of fixed head pile group embedded in non-homogeneous soil subjected to lateral cyclic loading-Distributed parameter sensitivity analy-sis[C]//Proceedings of the17th International Offshore and Polar Engineering Conference.Lisbon:International Society Offshore&Polar Engineers,2007:1388-1395.
[2]De Cock F A.Sense and sensitivity of pile load-deformation behaviour[C]//Deep Foundations on Bored and Auger Piles Proceedings.Ghent:CRC Press,2009:23-44.
[3]Xiao X C,Chi S C,Gao L,et al.Simplified method and parametric sensitivity analysis for soil-pile dynamic interac-tion under lateral seismic loading[C]//Advances in Building Technology Proceedings.Hong Kong:Elsevier Science,2002:771-778.
[4]Kleiber M,Antunez H,Hien TD,et al.Parameter Sen-sitivity in Nonlinear Mechanics[M].New York:Wiley,1997:59-89.
[5]Behrouz Asgarian,Mohammad Lesani.Pile-soil-structure interaction in pushover analysis of jacket offshore platforms using fiber elements[J].Journal of Constructional Steel Research,2009(65):209-218.
[6]GUAN Min-sheng,DU Hong-biao,JIANG Jing,et al.Pushover analysis on coupled shear wall with different pat-terns of coupling beam[J].Journal of Shenzhen University Science and Engineering,2009,26(4):376-381.(in Chinese)
[7]OpenSees Development Team.Open system for earthquake engineering simualtion[EB/OL].http://opensees.berke-ley.edu/
[8]Spacone E,Filippou F C,Taucer F F.Fiber beam-column model for nonlinear analysis of R/C frames:part I formula-tion[J].Earthquake Engineering and Structural Dynamics,1996,25:711-725.
[9]Taucer F,Spacone E,Filippou F C.Afiber beam-column element for seismic response analysis of reinforced concrete structures[R].UCB/EERC-91/17,California:Universi-ty of California,1991.
[10]Filippou F C,Popov E P,Bertero V V.Effects of bond deterioration on hysteretic behavior of reinforced concrete joints[R].UCB/EERC-83/19,California:University of California,1983.
[11]Boulanger W Ross,Curras J Christina,Kutter L Bruce,et al.Seismic soil-pile-structure interaction experiments and analyses[J].Journal of Geotechnical and Geoenvir-onmental Engineering,1999,125(9):750-759.
[12]Matlock.Correlations for design of laterally loaded piles in soft clay[C]//Proc Annu Offshore Technol Conf.Hous-ton:Elsevier Science,1970:577-594.
[13]Mokwa R L.Investigation of the Resistance of Pile Caps to Lateral Loading[D].Blacksburg:Virginia Polytechnic Institute,1999.
[14]Michael H Scott,Terje Haukaas.Software framework for parameter updating and finite-element response sensitivity analysis[J].Journal of Computing in Civil Engineering,2008,22(5):281-291.
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