某框架在侧向荷载作用下的裂缝检测及分析
|
摘要
对两栋现浇钢筋混凝土框架结构进行了侧向荷载作用下的裂缝开展状况调查与原因分析,通过实际工程检测发现,裂缝多出现在柱头和柱脚,而梁端裂缝甚少。该现象表明,现有结构设计方法得到的框架结构,在侧向荷载作用下,柱端塑性铰比梁端塑性铰更易于出现。由于现浇楼板的存在对框架梁端的实际抗弯能力起了不可忽略的参与作用,故在结构设计过程中应适当考虑其作用。
The crack development of two cast-in-place RC frame structures subjected to lateral loading was investigated.The reasons for the crack development were analyzed.The investigation indicates that many cracks appeared at the column end and few of them appeared at beam end.It shows that the plastic hinges appear more easily at column end than beam end in RC frame structure designed by the present designing method.The existence of monolithical slab in reinforced concrete frame structure strengthened the actual flexural capability of longitudinal beams.Therefore,the participation of monolithical slabs should be made into consideration in structural design to achieve the strong column weak beam philosophy.
The crack development of two cast-in-place RC frame structures subjected to lateral loading was investigated.The reasons for the crack development were analyzed.The investigation indicates that many cracks appeared at the column end and few of them appeared at beam end.It shows that the plastic hinges appear more easily at column end than beam end in RC frame structure designed by the present designing method.The existence of monolithical slab in reinforced concrete frame structure strengthened the actual flexural capability of longitudinal beams.Therefore,the participation of monolithical slabs should be made into consideration in structural design to achieve the strong column weak beam philosophy.
引文
[1]李宏男,肖诗云,霍林生.汶川地震震害调查与启示[J].建筑结构学报,2008,29(4):10-18.LI Hong-nan,XIAO Shi-yun,HUO Lin-sheng.Damage investigation and analysis of engineering structures in the Wenchuanearthquake[J].Journal of Building Structures,2008,29(4):10-18.(in Chinese)
[2]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.WANG Ya-yong.Lessons learnt from building damages in the Wenchuan earthquake——seismic concept design of buildings[J].Journal of Building Structures,2008,29(4):20-25.(in Chinese)
[3]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.YE Lie-ping,QU Zhe,MA Qian-li,et al.Study on ensuring the strong column-weak beam mechanism for RC frames based onthe damage analysis in the Wenchuan earthquake[J].Building Structure,2008,38(11):52-59.(in Chinese)
[4]French C W,Boroojerdi A.Contribution of RC floor slabs in resisting lateral loads[J].Journal of Structural Engineering,ASCE,1989,115(1):1-18.
[5]Pantazopoulou S J,French C W.Slab participation in practical earthquake design of reinforced concrete frame[J].ACIStructural Journal,2001,98(4):479-489.
[6]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 Su-guo,HAN Xiao-lei,JI Jing.The effect of slabs on the failure mode of reinforced concrete frame structures[J].Journal of Civil,Architectural and Environmental Engineering,2009,31(1):66-71.(in Chinese)
[7]Shahrooz B M,Moehle J P.Evaluation of seismic performance of reinforced concrete frames[J].Journal of Structural Engineering,ASCE,1990,117(5):1403-1422.
[8]French C W,Moehle J P.Effect of floor slab on behavior of slab-beam-column connections[C]//Design of Beam-Column Jointsfor Seismic Resistance.Farmington Hills Mich:American Concrete Institute,1991:225-285.
[9]Cheung P C,Paulay T,Park R.Mechanisms of slab contributions in beam-column slab subassemblages[J].Seismic Resistance,1991,123:259-289.
[10]Burcu B Canbolat,James K Wight.Experimental investigation on sismic behavior of eccentric reinforced concrete beam-column-slab connections[J].ACI Structural Journal,2008,105(2):154-162.
[11]王素裹,韩小雷,季静,等.现浇楼板对框架梁受力影响的研究[J].华南地震,2009,29(2):35-41.WANG Su-guo,HAN Xiao-lei,JI Jing,et al.Study on influence of cast-in-place slab on main beams in RC frame[J].SouthChina Journal of Seismology,2009,29(2):35-41.(in Chinese)
[2]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.WANG Ya-yong.Lessons learnt from building damages in the Wenchuan earthquake——seismic concept design of buildings[J].Journal of Building Structures,2008,29(4):20-25.(in Chinese)
[3]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.YE Lie-ping,QU Zhe,MA Qian-li,et al.Study on ensuring the strong column-weak beam mechanism for RC frames based onthe damage analysis in the Wenchuan earthquake[J].Building Structure,2008,38(11):52-59.(in Chinese)
[4]French C W,Boroojerdi A.Contribution of RC floor slabs in resisting lateral loads[J].Journal of Structural Engineering,ASCE,1989,115(1):1-18.
[5]Pantazopoulou S J,French C W.Slab participation in practical earthquake design of reinforced concrete frame[J].ACIStructural Journal,2001,98(4):479-489.
[6]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 Su-guo,HAN Xiao-lei,JI Jing.The effect of slabs on the failure mode of reinforced concrete frame structures[J].Journal of Civil,Architectural and Environmental Engineering,2009,31(1):66-71.(in Chinese)
[7]Shahrooz B M,Moehle J P.Evaluation of seismic performance of reinforced concrete frames[J].Journal of Structural Engineering,ASCE,1990,117(5):1403-1422.
[8]French C W,Moehle J P.Effect of floor slab on behavior of slab-beam-column connections[C]//Design of Beam-Column Jointsfor Seismic Resistance.Farmington Hills Mich:American Concrete Institute,1991:225-285.
[9]Cheung P C,Paulay T,Park R.Mechanisms of slab contributions in beam-column slab subassemblages[J].Seismic Resistance,1991,123:259-289.
[10]Burcu B Canbolat,James K Wight.Experimental investigation on sismic behavior of eccentric reinforced concrete beam-column-slab connections[J].ACI Structural Journal,2008,105(2):154-162.
[11]王素裹,韩小雷,季静,等.现浇楼板对框架梁受力影响的研究[J].华南地震,2009,29(2):35-41.WANG Su-guo,HAN Xiao-lei,JI Jing,et al.Study on influence of cast-in-place slab on main beams in RC frame[J].SouthChina Journal of Seismology,2009,29(2):35-41.(in Chinese)
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