楼板开角缝实现RC框架“强柱弱梁”效果的有限元分析
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摘要
利用有限元软件ADINA对一栋6层现浇钢筋混凝土框架结构的梁柱节点做了拟静力分析与地震动力反应分析,并对普通梁柱节点与周围楼板设角缝节点的结果对比。分析计算结果表明,对于普通梁柱节点,在梁柱节点处采用开角缝的措施之后,梁受力主筋屈服明显提前,柱混凝土裂缝明显减少,梁、柱塑性铰出现时间间隔增加。首层柱柱脚处塑性铰的出现延后,更加接近总体机制破坏。
A numerical quasi-static and dynamic earthquake response model was established with ADINA software for beam-column interior joint in a reinforced concrete frame.The results for traditional joint specified in design code and that for the joint with slot around were compared.It is shown that for the joint with slot around,the yielding time of beam reinforced bar will shift to an earlier time,while the number of cracks on column becomes less.The time interval between the occurrence of plastic pivot on beam and on column becomes longer,which exhibits a failure type closer to the beam-pivot mode.
A numerical quasi-static and dynamic earthquake response model was established with ADINA software for beam-column interior joint in a reinforced concrete frame.The results for traditional joint specified in design code and that for the joint with slot around were compared.It is shown that for the joint with slot around,the yielding time of beam reinforced bar will shift to an earlier time,while the number of cracks on column becomes less.The time interval between the occurrence of plastic pivot on beam and on column becomes longer,which exhibits a failure type closer to the beam-pivot mode.
引文
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[2]薛彦涛,黄世敏,姚秋来.汶川地震钢筋混凝土框架结构震害及对策[J].工程抗震与加固改造,2009,31(5):93-100.XUE Yantao,HUANG Shimin,YAO Qiulai.Seismic damage and design concept from the buildings of RC frame structure in Wenchuan earthquake[J].Earthquake Resistant Engineering and Retrofitting,2009,31(5):93-100.(in Chinese)
[3]王威,薛建阳,章红梅,等.框架结构在汶川5.12大地震中的震害分析及抗震启示[J].世界地震工程,2009,25(4):131-135.WANG Wei,XUE Jianyang,ZHANG Hongmei,et al.Seismic design and lessons learnt from the earthquake disaster of frame structures in 5.12Wenchuan earthquake[J].World Earthquake Engineering.2009,25(4):131-135.(in Chinese)
[4]苏幼坡,张玉敏,王绍杰,等.从汶川地震看提高建筑结构抗倒塌能力的必要性和可行性[J].土木工程学报,2009,42(5):25-32.SU Youpo,ZHANG Yumin,WANG Shaojie,et al.The necessity and feasibility of enhancing seismic design of stuctures based on the Wenchuanearthquake[J].China Civil Engineering Journal,2009,42(5):25-32.(in Chinese)
[5]王素裹,韩小雷,季静.现浇楼板对RC框架结构破坏形式的影响分析[J].土木建筑与环境工程,2009,31(1):66-71.WANG Suguo,HAN Xiaolei,JI Jing.The effect of slabs on the failure mode of reinforced concrete frame structures[J].Journal of Civil,Architectur-al&Environmental Engineering,2009,31(1):66-71.(in Chinese)
[6]ACI 318-08,building code requirements for structural concrete and commentary[S].American Concrete Institute,Detroit,MI,2008.
[7]岳戈,陈权.ADINA应用基础与实例详解[M].北京:人民交通出版社,2008.YUE Ge,CHEN Quan.ADINA applied base and example detailed explain[J].Beijing:China Communications Press.2008.(in Chinese)
[8]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989.TANG Jiuru.Reinforced concrete frame joints aseismic[M].Nanjing:Southeast University Press.1989.(in Chinese)
[9]朱彦鹏、陶萱榕.钢筋混凝土框架柱端弯矩增大系数初探[J].工程抗震与加固改造,2010,32(4):52-57.ZHU Yanpeng,TAO Xuanrong.Initial discussion about the moment amplification factor of reinforced concrete frame columns[J].Earthquake Re-sistant Engineering and Retrofitting,2010,32(4):52-57.(in Chinese)
[10]沈聚敏,周锡元,高小旺,等.抗震工程学[M].北京.中国建筑工业出版社,2000.SHEN Jumin,ZHOU Xiyuan,GAO Xiaowang,et al.Aseismic Engineering[M].Beijing:China Architecture and Building Press,2000.(in Chinese)
[11]GB50010-2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.GB50010-2002 Gode for Design of Concrete Structures[S].Beijing:China Architecture and building Press,2002.(in Chinese)
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