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第6期 王树和等:钢筋归并对钢筋混凝土框架结构超强特性的影响 835. 4结论 5]Yang Y,Bai S L.Issues on reliability level of China seismic (1)钢筋混凝土框架结构的超强系数随结构层 design code of buildings by comparison with other coun- 数的增加而减小,减小的幅度随结构层数的增加而 tries.J Chongqing Archit Univ,2000,22(Supp 1):192 (杨媛,白绍良.从各国规范对比看我国抗震设计安全水准 变小,主要原因是重力荷载在低层起控制作用,而 评价中的有关问题.重庆建筑大学学报,2000,22(增刊1): 在高层结构中则是水平地震作用起控制作用. 192) (2)结构的超强系数随着结构归并程度的增大 [6]Mwafy A M,Elnashai A S.Calibration of force reduction 而增大,在低层结构中归并对超强的影响较高层结 factors of RC buildings.J Earthquake Eng,2002,6(2): 构更为明显.结构跨度与设防烈度对结构超强也具 239 有明显的影响,在各种跨度和设防烈度下,超强系 [7]Balendra T,Tan K H,Kong S K.Vulnerability of rein- 数与归并程度和层数间的规律是一致的 forced concrete frames in low seismic region,when de- (3)超强在各种因素下存在变化,结构的安全 signed according to BS 8110.Earthquake Eng Struct Dyn 1999,28(3):1361 储备并不一致,随层数和归并的不同而变化,而目 [8]Elnashai A S,Mwafy A M.Overstrength and force reduc- 前我国地震作用取值的方法并没有考虑这一点,因 tion factors of multistorey reinforced-concrete buildings. 此应在今后规范修订中加以重视. Struct Des Tall Build,2002,11(5):329 9]Zhao F L.Research on Overstrength Factors of 参考文献 Reinforced-concrete Frame Structures Dissertation. Xi'an:Xi'an University of Architecture and Technology, [1]Gao X W,Bao A B.Determination of anti-seismic level 2008 by probabilistic method.J Build Struct,1986,6(2):55 (赵风雷.钢筋混凝土框架结构超强系数的研究[学位论文] (高小旺,鲍霭斌.用概率方法确定抗震设防标准.建筑结 西安:西安建筑科技大学,2008) 构学报,1986,6(2:55) [10 Zhang L H.Analysis on Overstrength Factors of [2]Zhou X Y,Zeng D M,Gao X A.Simplified method for Reinforced Concrete Frame Structures [Dissertation]. evaluating seismic design intensities structures with vari- Chongqing:Chongqing University,2009 ous service periods.Build Struct,2002,32(1):37 (张连河.钢筋混凝土框架结构超强系数分析[学位论文]. (周锡元,曾德民,高晓安。估计不同服役期结构的抗震设 重庆:重庆大学,2009) 计设防水准的简单方法.建筑结构,2002,32(1):37) [11]Liu L H.Preliminary Analysis of R-u Relationships of [3]Ma Y H,Xie L L.Determination of frequently occurred MDOF and Influence of the Degree of Statical Inde- and seldomly occurred earthquakes in consideration of terminacy on Overstrength Dissertation].Chongqing: earthquake environment.J Build Struct,2002,23(1):43 Chongqing University,2007 (马玉宏,谢礼立.考虑地震环境的设计常遇地震和罕遇地 (刘兰花.多自由度体系R-4规律初步分析及超静定次数 震的确定.建筑结构学报,2002,23(1):43) 对结构超强的影响[学位论文].重庆:重庆大学,2007) [4]Shen J W,Cai C Q.Rotational components of earthquake [12]Yang H,Wu JJ,Wang Z J.Analyses of nonlinear models ground motions.Earthquake EngEng Vib,1997,17(2): for the seismic responses of RC frames.Earthguake Eng 2> Eng Vib,2008.28(2):20 (沈建文,蔡长青.地震危险性分析与抗震设防标准的确定 (杨红,吴品品,王志军.模型化方法对钢筋混凝土框架地 地震工程与工程振动,1997,17(2):27) 震反应的影响分析.地震工程与工程振动,2008,28(2):20)第 6 期 王树和等:钢筋归并对钢筋混凝土框架结构超强特性的影响 835 ·· 4 结论 (1) 钢筋混凝土框架结构的超强系数随结构层 数的增加而减小,减小的幅度随结构层数的增加而 变小,主要原因是重力荷载在低层起控制作用,而 在高层结构中则是水平地震作用起控制作用. (2) 结构的超强系数随着结构归并程度的增大 而增大,在低层结构中归并对超强的影响较高层结 构更为明显. 结构跨度与设防烈度对结构超强也具 有明显的影响,在各种跨度和设防烈度下,超强系 数与归并程度和层数间的规律是一致的. (3) 超强在各种因素下存在变化,结构的安全 储备并不一致,随层数和归并的不同而变化,而目 前我国地震作用取值的方法并没有考虑这一点,因 此应在今后规范修订中加以重视. 参 考 文 献 [1] Gao X W, Bao A B. Determination of anti-seismic level by probabilistic method. J Build Struct, 1986, 6(2): 55 (高小旺, 鲍霭斌. 用概率方法确定抗震设防标准. 建筑结 构学报, 1986, 6(2): 55) [2] Zhou X Y, Zeng D M, Gao X A. Simplified method for evaluating seismic design intensities structures with vari￾ous service periods. Build Struct, 2002, 32(1): 37 (周锡元, 曾德民, 高晓安. 估计不同服役期结构的抗震设 计设防水准的简单方法. 建筑结构, 2002, 32(1): 37) [3] Ma Y H, Xie L L. Determination of frequently occurred and seldomly occurred earthquakes in consideration of earthquake environment. J Build Struct, 2002, 23(1): 43 (马玉宏, 谢礼立. 考虑地震环境的设计常遇地震和罕遇地 震的确定. 建筑结构学报, 2002, 23(1): 43) [4] Shen J W, Cai C Q. Rotational components of earthquake ground motions. Earthquake Eng Eng Vib, 1997, 17(2): 27 (沈建文, 蔡长青. 地震危险性分析与抗震设防标准的确定. 地震工程与工程振动, 1997, 17(2): 27) [5] Yang Y, Bai S L. Issues on reliability level of China seismic design code of buildings by comparison with other coun￾tries. J Chongqing Archit Univ, 2000, 22(Supp l): 192 (杨媛, 白绍良. 从各国规范对比看我国抗震设计安全水准 评价中的有关问题. 重庆建筑大学学报, 2000, 22(增刊 1): 192) [6] Mwafy A M, Elnashai A S. Calibration of force reduction factors of RC buildings. J Earthquake Eng, 2002, 6(2): 239 [7] Balendra T, Tan K H, Kong S K. Vulnerability of rein￾forced concrete frames in low seismic region, when de￾signed according to BS 8110. Earthquake Eng Struct Dyn, 1999, 28(3): 1361 [8] Elnashai A S, Mwafy A M. Overstrength and force reduc￾tion factors of multistorey reinforced-concrete buildings. Struct Des Tall Build, 2002, 11(5): 329 [9] Zhao F L. Research on Overstrength Factors of Reinforced-concrete Frame Structures [Dissertation]. Xi’an: Xi’an University of Architecture and Technology, 2008 (赵风雷. 钢筋混凝土框架结构超强系数的研究 [学位论文]. 西安:西安建筑科技大学, 2008) [10] Zhang L H. Analysis on Overstrength Factors of Reinforced Concrete Frame Structures [Dissertation]. Chongqing: Chongqing University, 2009 (张连河. 钢筋混凝土框架结构超强系数分析 [学位论文]. 重庆: 重庆大学, 2009) [11] Liu L H. Preliminary Analysis of R-µ Relationships of MDOF and Influence of the Degree of Statical Inde￾terminacy on Overstrength [Dissertation]. Chongqing: Chongqing University, 2007 (刘兰花. 多自由度体系 R-µ 规律初步分析及超静定次数 对结构超强的影响 [学位论文]. 重庆: 重庆大学, 2007) [12] Yang H, Wu J J, Wang Z J. Analyses of nonlinear models for the seismic responses of RC frames. Earthquake Eng Eng Vib, 2008, 28(2): 20 (杨红, 吴晶晶, 王志军. 模型化方法对钢筋混凝土框架地 震反应的影响分析. 地震工程与工程振动, 2008, 28(2): 20)
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