现浇楼板对RC框架梁抗弯承载力的增强作用
|
摘要
震害分析表明,大量的现浇钢筋混凝土框架结构并未实现设计规范所要求的"强柱弱梁"梁铰破坏机制。总结国内外研究现状,研究楼板作用(楼板内钢筋)对支座节点处的实际负弯矩增强作用机理;并基于设计规范中的规定,通过实例计算分析,表明尽管GB 50011-2010规范、GB 50010-2010规范和JGJ 3-2010规程进一步提高了柱端弯矩增大系数,但在板具有较高配筋率时,仍不能完全保证"强柱弱梁"的实现。最后给出了增强柱端弯矩、以及梁端实际负弯矩计算和配置等方面的设计建议。
By analyzing the failure model of various reinforced concrete frame structures in earthquake,it shows that the failure mechanism of strong column and weak beam expected could not achieve for a lot of casting reinforced concrete frame structures.Based on the effect of casting slab on the moment bearing capability of beam in reinforced concrete frame structures,the mechanism on the effect of the over-strength caused by casting slab on the negative moment bearing capability of beam end is studied.By analyzing an actual example according to design codes,it shows that although the increasing coefficients of moment of column end are enhanced in GB 50011-2010 code for seismic design of buildings,GB 50010-2010 code for design of concrete structures,and JG J3-2010 technical specification for concrete structures of tall building and higher ratios of reinforcement were used,the mechanism of strong column and weak beam cannot be surely achieved.In conclusion,some suggestions for structural design are given for reinforced concrete frame structures,such as how to strengthen bending moments at the ends of column,to calculate real negative bending moments at the ends of beam and so on.
By analyzing the failure model of various reinforced concrete frame structures in earthquake,it shows that the failure mechanism of strong column and weak beam expected could not achieve for a lot of casting reinforced concrete frame structures.Based on the effect of casting slab on the moment bearing capability of beam in reinforced concrete frame structures,the mechanism on the effect of the over-strength caused by casting slab on the negative moment bearing capability of beam end is studied.By analyzing an actual example according to design codes,it shows that although the increasing coefficients of moment of column end are enhanced in GB 50011-2010 code for seismic design of buildings,GB 50010-2010 code for design of concrete structures,and JG J3-2010 technical specification for concrete structures of tall building and higher ratios of reinforcement were used,the mechanism of strong column and weak beam cannot be surely achieved.In conclusion,some suggestions for structural design are given for reinforced concrete frame structures,such as how to strengthen bending moments at the ends of column,to calculate real negative bending moments at the ends of beam and so on.
引文
[1]GB50011-2010,建筑抗震设计规范[S].
[2]叶列平,曲哲,马千里,等.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52-59.
[3]中国建筑科学研究院.高层建筑结构设计[M].北京:科学出版社,1985.
[4]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[5]夏珊,刘爱文.汶川地震框架柱震害的初步分析[J].震灾防御技术,2008,3(3):237-242.
[6]田志鹏,张新培,赵统.汶川地震中多层钢筋混凝土框架结构房屋震害分析[J].建筑结构,2009,39(11):67-71.
[7]王亚勇.汶川地震建筑震害启示——抗震概念设计[J].建筑结构学报,2008,29(4):20-25.
[8]叶列平,曲哲,陆新征,等.提高建筑结构抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.
[9]赖丽清.RC框架结构“强柱弱梁”机制的实现与影响因素探讨[J].福建建设科技,2010,(2):15-16.
[10]管民生,杜宏彪.现浇楼板参与工作后框架结构的pushover分析研究[J].地震工程与工程振动,2005,25(5):117-123.
[11]单慧敏,戴君武,王艳茹.现浇楼板对钢筋混凝土框架结构破坏模式影响浅析[J].土木工程学报,2010,43(s1):169-172.
[12]宋吉荣,何世龙.现浇板钢筋对混凝土框架结构抗震影响分析[J].四川建筑科学研究,2010,36(5):55-57.
[13]罗青儿,王蕴,翁煜辉,等.装配整体式钢筋混凝土框架梁柱节点的试验研究[J].工业建筑,2009,39(2):80-83.
[14]蒋永生,陈忠范,周绪平,等.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16.
[15]马千里,叶列平,陆新征,等.现浇楼板对框架结构柱梁强度比的影响研究[C]∥汶川地震建筑震害分析与重建研讨会论文集.北京:中国建筑工业出版社,2008:263-271.
[16]GB50010-2010,混凝土结构设计规范[S].
[17]JGJ3-2010,高层建筑混凝土结构技术规程[S].
[18]French C W,Moehle J P.Effect of floor slab on be-havior of slab-beam-column connections[J].Designof Beam-Column Joints for Seismic Resistance,SP-123,1991,(45):225-258.
[19]郑士举,蒋利学,张伟平,等.现浇混凝土框架梁端截面有效翼缘宽度的试验研究与分析[J].结构工程师,2009,25(2):134-140.
[20]翟长海,李爽,孙扬,等.楼板对钢筋混凝土框架结构受力性能影响[J].灾害学,2010,25(s1):105-110.
[21]吴勇.设计基本地震加速度为0.15g和0.30g的地区钢筋混凝土框架的非线性动力反应研究[D].重庆:重庆大学,2002.
[22]吴勇,雷汲川,杨红,等.板筋参与梁端负弯矩承载力问题的探讨[J].重庆建筑大学学报,2002,24(3):33-37.
[23]NZS 4203,General Structural Design and Design Load-ings for Buildings[S].
[24]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.
[2]叶列平,曲哲,马千里,等.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52-59.
[3]中国建筑科学研究院.高层建筑结构设计[M].北京:科学出版社,1985.
[4]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[5]夏珊,刘爱文.汶川地震框架柱震害的初步分析[J].震灾防御技术,2008,3(3):237-242.
[6]田志鹏,张新培,赵统.汶川地震中多层钢筋混凝土框架结构房屋震害分析[J].建筑结构,2009,39(11):67-71.
[7]王亚勇.汶川地震建筑震害启示——抗震概念设计[J].建筑结构学报,2008,29(4):20-25.
[8]叶列平,曲哲,陆新征,等.提高建筑结构抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.
[9]赖丽清.RC框架结构“强柱弱梁”机制的实现与影响因素探讨[J].福建建设科技,2010,(2):15-16.
[10]管民生,杜宏彪.现浇楼板参与工作后框架结构的pushover分析研究[J].地震工程与工程振动,2005,25(5):117-123.
[11]单慧敏,戴君武,王艳茹.现浇楼板对钢筋混凝土框架结构破坏模式影响浅析[J].土木工程学报,2010,43(s1):169-172.
[12]宋吉荣,何世龙.现浇板钢筋对混凝土框架结构抗震影响分析[J].四川建筑科学研究,2010,36(5):55-57.
[13]罗青儿,王蕴,翁煜辉,等.装配整体式钢筋混凝土框架梁柱节点的试验研究[J].工业建筑,2009,39(2):80-83.
[14]蒋永生,陈忠范,周绪平,等.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16.
[15]马千里,叶列平,陆新征,等.现浇楼板对框架结构柱梁强度比的影响研究[C]∥汶川地震建筑震害分析与重建研讨会论文集.北京:中国建筑工业出版社,2008:263-271.
[16]GB50010-2010,混凝土结构设计规范[S].
[17]JGJ3-2010,高层建筑混凝土结构技术规程[S].
[18]French C W,Moehle J P.Effect of floor slab on be-havior of slab-beam-column connections[J].Designof Beam-Column Joints for Seismic Resistance,SP-123,1991,(45):225-258.
[19]郑士举,蒋利学,张伟平,等.现浇混凝土框架梁端截面有效翼缘宽度的试验研究与分析[J].结构工程师,2009,25(2):134-140.
[20]翟长海,李爽,孙扬,等.楼板对钢筋混凝土框架结构受力性能影响[J].灾害学,2010,25(s1):105-110.
[21]吴勇.设计基本地震加速度为0.15g和0.30g的地区钢筋混凝土框架的非线性动力反应研究[D].重庆:重庆大学,2002.
[22]吴勇,雷汲川,杨红,等.板筋参与梁端负弯矩承载力问题的探讨[J].重庆建筑大学学报,2002,24(3):33-37.
[23]NZS 4203,General Structural Design and Design Load-ings for Buildings[S].
[24]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.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心