考虑既有建筑最不利方向的抗震能力评估方法
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摘要
主要研究在役结构的抗震性能评估方法。首先,在前人研究的基础上,给出了在役结构的力学模型;其次,通过对2次小震的动力时程分析,得出结构的最不利方向,并在此方向上利用三维分析程序CANNY 99,对结构进行Pushover分析,将得出的结构能力曲线与由实际地震波得到的需求谱叠合,求出结构性能点,进而评估结构的抗震性能。通过一算例具体说明该方法的应用步骤,并由程序输出结构在到达性能点时的梁柱破坏情况。本文从钢筋锈蚀和混凝土老化这两个方面考虑使用年限对结构的影响;同时,从结构的最不利方向对结构进行Pushover分析,考虑了结构在地震作用下柱子双向受弯的特点,更加符合实际情况。
This paper studies the seismic performance evaluation method of existing structures.Firstly,mechanical model of the structure in service is given based on previous studies.Secondly,the most disadvantageous direction of structure is obtained through two small earthquake time-history analyses,and the pushover analysis is carried out in this direction using three-dimensional analysis program CANNY99.Finally,the structure performance point for seismic performance assessment is gained by superimposing the structure curves onto the actual demand spectrum of seismic wave.The procedure of the proposed method is performed through a specified example.The destruction of the beams which reach performance point is simulated by program.In this paper,the impact of service life on structure is considered based on the research of steel corrosion and concrete aging.At the same time,the pushover analysis of the structure is carried out in consideration of the most disadvantageous direction.The proposed method considers the characteristics of two-way bent of the columns and is proved to be more practicable.
This paper studies the seismic performance evaluation method of existing structures.Firstly,mechanical model of the structure in service is given based on previous studies.Secondly,the most disadvantageous direction of structure is obtained through two small earthquake time-history analyses,and the pushover analysis is carried out in this direction using three-dimensional analysis program CANNY99.Finally,the structure performance point for seismic performance assessment is gained by superimposing the structure curves onto the actual demand spectrum of seismic wave.The procedure of the proposed method is performed through a specified example.The destruction of the beams which reach performance point is simulated by program.In this paper,the impact of service life on structure is considered based on the research of steel corrosion and concrete aging.At the same time,the pushover analysis of the structure is carried out in consideration of the most disadvantageous direction.The proposed method considers the characteristics of two-way bent of the columns and is proved to be more practicable.
引文
[1]王丰.基于性能的结构多维抗震设计方法研究[D].大连:大连理工大学土木水利学院,2006.Wang F.Studies on performance-based seismic designmethods of structures subjected to multi-dimensionalearthquake excitations[D].Dalian:School of Civiland Hydraulic Engineering,Dalian University ofTeehnology,2006.
[2]FEMA273.NEHRP Commentary on the Guidelinesfor the Rehabilitation of Buildings[S].Federal Emer-gency Management Agency,Washington D.C.,1996.
[3]全伟,李宏男.曲线桥多维地震时程分析主方向研究[J].振动与冲击,2008,27(8):20-25.Quan W,Li HN.Research on critical angle of curvedbridge in multi-dimensional earthquake time historyanalysi[J].Journal of Vibration and Shock,2008,27(8):20-25.
[4]史庆轩,牛荻涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土恢复力性能的试验研究[J].地震工程与工程振动,2000,20(4):44-50.Shi Q X,Niu D T,Yan G Y.Repeated loads of cor-roded reinforced concrete study on performance ofrestoring force[J].Earthquake Engineering and Engi-neering Vibration,2000,20(4):44-50.
[5]王学民.锈蚀钢筋混凝土构件抗震性能试验与恢复力模型研究[J].西安建筑科技大学学报,2003,33(4):17-21.Wang X M.Research of seismic performance and hys-teretic mode of corroded reinforeed concrete members[J].Journal of Xi′an University of Architecture andTechnology,2003,33(4):17-21.
[6]陈新孝,牛荻涛,王学民.锈蚀钢筋混凝土压弯构件的恢复力模型[J].西安建筑科技大学学报,2005,37(2):155-159.Chen X X,Niu D T,Wang X M.The force-restoringmodel of corroded reinforced concrete members withflexure and compression[J].Journal of Xi′an Univer-sity of Architecture and Technology,2005,37(2):155-159.
[7]刘海,姚继涛,牛荻涛.钢筋混凝土结构基于锈胀开裂寿命准则的耐久性设计方法[J].西安建筑科技大学,2009,41(1):25-31.Liu H,Yao J T,Niu D T.Durability design of RCstructures based on the life criterion of cover cracking[J].Journal of Xi′an University of Architecture andTechnology,2009,41(1):25-31.
[8]董振平,牛荻涛,刘西芳,等.一般大气环境下钢筋开始锈蚀时间的计算方法[J].西安建筑科技大学学报(自然科学版),2006,38(2):204-209.Dong Z P,Niu D T,Liu X F,et al.Under normal at-mospheric environment steel bars began to rustmethod of calculating the time[J].Journal of Xi′anUniversity of Architecture and Technology,2006,38(2):204-209.
[9]牛荻涛.混凝土结构耐久性与寿命预测[M].北京:科学出版社,2003.Niu D T.Durability and Life Forecast of ReinforcedConcrete Structures[M].Beijing:Science Press,2003.
[10]方璟,梅国兴,陆采荣.碳化对混凝土性能影响的研究[J].水利水电技术,1996,23(2):58-63.Fang J,Mei G X,Lu C R.Influence of carbonationon properties of conerete[J].Water Resources andHydropower Engineering,1996,23(2):58-63.
[2]FEMA273.NEHRP Commentary on the Guidelinesfor the Rehabilitation of Buildings[S].Federal Emer-gency Management Agency,Washington D.C.,1996.
[3]全伟,李宏男.曲线桥多维地震时程分析主方向研究[J].振动与冲击,2008,27(8):20-25.Quan W,Li HN.Research on critical angle of curvedbridge in multi-dimensional earthquake time historyanalysi[J].Journal of Vibration and Shock,2008,27(8):20-25.
[4]史庆轩,牛荻涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土恢复力性能的试验研究[J].地震工程与工程振动,2000,20(4):44-50.Shi Q X,Niu D T,Yan G Y.Repeated loads of cor-roded reinforced concrete study on performance ofrestoring force[J].Earthquake Engineering and Engi-neering Vibration,2000,20(4):44-50.
[5]王学民.锈蚀钢筋混凝土构件抗震性能试验与恢复力模型研究[J].西安建筑科技大学学报,2003,33(4):17-21.Wang X M.Research of seismic performance and hys-teretic mode of corroded reinforeed concrete members[J].Journal of Xi′an University of Architecture andTechnology,2003,33(4):17-21.
[6]陈新孝,牛荻涛,王学民.锈蚀钢筋混凝土压弯构件的恢复力模型[J].西安建筑科技大学学报,2005,37(2):155-159.Chen X X,Niu D T,Wang X M.The force-restoringmodel of corroded reinforced concrete members withflexure and compression[J].Journal of Xi′an Univer-sity of Architecture and Technology,2005,37(2):155-159.
[7]刘海,姚继涛,牛荻涛.钢筋混凝土结构基于锈胀开裂寿命准则的耐久性设计方法[J].西安建筑科技大学,2009,41(1):25-31.Liu H,Yao J T,Niu D T.Durability design of RCstructures based on the life criterion of cover cracking[J].Journal of Xi′an University of Architecture andTechnology,2009,41(1):25-31.
[8]董振平,牛荻涛,刘西芳,等.一般大气环境下钢筋开始锈蚀时间的计算方法[J].西安建筑科技大学学报(自然科学版),2006,38(2):204-209.Dong Z P,Niu D T,Liu X F,et al.Under normal at-mospheric environment steel bars began to rustmethod of calculating the time[J].Journal of Xi′anUniversity of Architecture and Technology,2006,38(2):204-209.
[9]牛荻涛.混凝土结构耐久性与寿命预测[M].北京:科学出版社,2003.Niu D T.Durability and Life Forecast of ReinforcedConcrete Structures[M].Beijing:Science Press,2003.
[10]方璟,梅国兴,陆采荣.碳化对混凝土性能影响的研究[J].水利水电技术,1996,23(2):58-63.Fang J,Mei G X,Lu C R.Influence of carbonationon properties of conerete[J].Water Resources andHydropower Engineering,1996,23(2):58-63.
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