RC空间框架结构竖向倒塌全过程试验研究与理论分析
|
摘要
采用抽柱法对一双层双向RC空间框架结构进行了拟静力倒塌试验,分别研究了框架结构底层边中柱失效后,剩余结构的竖向倒塌过程、倒塌机制和倒塌细节。试验结果表明:RC空间框架结构竖向倒塌分为外推阶段(拱作用阶段)、内收阶段(悬链线作用阶段)和倒塌阶段三个阶段;现浇楼板推迟甚至避免了梁铰出现,具体与现浇楼板对梁的约束大小有关;RC空间框架结构具有良好的抗连续倒塌性能,但应特别注意现浇楼板对结构抗连续倒塌性能的影响。在试验研究基础上,分析了RC空间框架结构竖向倒塌机制的转化过程,提出了最大侧向变形和临界塌落位移的计算模型和求解方法,建立了结构损伤指数模型。
A quasi-static test is carried out to experimentally study the vertical progressive collapse of a two-storey by two-bay spatial RC frame structure. The progressive collapse mechanism and collapse details of the residual structure due to a side column loss are simulated by unloading the jack, replacing the failure column. The experimental results indicate that: the whole vertical-collapse damaged-process of RC spatial frame structures can be divided into three stages, including an extrapolation stage(arch action stage), an adduction stage(catenaries action stage) and a collapse stage; the appearance of plastic hinges, which are relative to the binding effects of slabs on beams, can be put off or even be skipped; RC spatial frame structure has a fine anti-collapse performance, but the influence of cast-in-situ slabs on anti-collapse performance of a structure should be considered seriously; the theoretical method for maximum lateral displacement and the mathematical model and the method for the critical displacement of the slumping column are raised in the combination of an experimental research and a theoretical analysis; what is more, the structure damage indictor model was proposed.
A quasi-static test is carried out to experimentally study the vertical progressive collapse of a two-storey by two-bay spatial RC frame structure. The progressive collapse mechanism and collapse details of the residual structure due to a side column loss are simulated by unloading the jack, replacing the failure column. The experimental results indicate that: the whole vertical-collapse damaged-process of RC spatial frame structures can be divided into three stages, including an extrapolation stage(arch action stage), an adduction stage(catenaries action stage) and a collapse stage; the appearance of plastic hinges, which are relative to the binding effects of slabs on beams, can be put off or even be skipped; RC spatial frame structure has a fine anti-collapse performance, but the influence of cast-in-situ slabs on anti-collapse performance of a structure should be considered seriously; the theoretical method for maximum lateral displacement and the mathematical model and the method for the critical displacement of the slumping column are raised in the combination of an experimental research and a theoretical analysis; what is more, the structure damage indictor model was proposed.
引文
[1]Mehrdad Sasani,Andre Werner,Ali Kazemi.Bar fracture modeling in progressive collapse analysis of reinforced concrete structures[J].Engineering Structures,2011,33(2):401―409.
[2]Shi Yanchao,Li Zhongxian,Hao Hong.A new method for progressive collapse analysis of RC frames under blast loading[J].Engineering Structures,2010,32(6):1691―1703.
[3]李爽,赵颖,翟长海,等.节点对RC框架结构抗连续倒塌能力影响研究[J].工程力学,2012,29(12):80―87.Li Shuang,Zhao Ying,Zhai Changhai,et al.The influences of joint on the progressive collapse-resisting performance of RC frames[J].Engineering Mechanics,2012,29(12):80―87.(in Chinese)
[4]吴波,黄仕香.结构倒塌时楼板碰撞效应的简化评估方法[J].工程力学,2013,30(3):306―314.Wu Bo,Huang Shixiang.A simplified evaluating method for impacting of floor slabs during structural collapse[J].Engineering Mechanics,2013,30(3):306―314.(in Chinese)
[5]张雷明.灾害荷载下结构倒塌机制研究[D].北京:清华大学,1999.Zhang Leiming.Researches on the collapse mechanisms of structures under disastrous loading[D].Beijing:Tsinghua University,1999.(in Chinese)
[6]易伟建,何庆锋,肖岩.钢筋混凝土框架结构抗倒塌性能的试验研究[J].建筑结构学报,2007,28(5):104―109,117.Yi Weijian,He Qingfeng,Xiao Yan.Collapse performance of RC frame structures[J].Journal of Building Structures,2007,28(5):104―109,117.(in Chinese)
[7]陆新征,林旭川,叶列平,等.地震下高层建筑连续倒塌数值模型研究[J].工程力学,2010,27(11):64―70.Lu Xinzheng,Lin Xuchuan,Ye Lieping,et al.Numerical models for earthquake induced progressive collapse of high-rise buildings[J].Engineering Mechanics,2010,27(11):64―70.(in Chinese)
[8]Mehrdad Sasani,Serkan Sagiroglu.Progressive collapse resistance of hotel San Diego[J].Journal of Structural Engineering,2008,134(3):478―488.
[9]Zhao Dong Xu,Ben Qiang Shi,Ke Yi Wu,et al.Vertical shaking table tests on the structure with viscoelastic multi-dimensional earthquake isolation and mitigation devices[J].Science in China(Series E),2009,52(10):2869―2876.
[10]GSA2003,Progressive collapse analysis and design guidelines for new federal office buildings and major modernization project[S].2013.
[11]谢甫哲,舒赣平,凤俊敏.基于抽柱法的钢框架连续倒塌分析[J].东南大学学报(自然科学版),2010,40(1):154―159.Xie Fuzhe,Shu Ganping,Feng Junmin.Progressive collapse analysis of steel frame structure using removing column method[J].Journal of Southeast University(Natural Science Edition),2010,40(1):154―159.(in Chinese)
[12]徐有邻.混凝土结构理论及规范的发展[J].建筑结构学报,2010,31(6):17―21.Xu Youlin.Development of concrete structure theory and code[J].Journal of Building Structures,2010,31(6):17―21.(in Chinese)
[13]何庆锋,易伟建.考虑悬索作用钢筋混凝土梁柱子结构抗倒塌性能试验研究[J].土木工程学报,2011,44(4):52―59.He Qingfeng,Yi Weijian.Experimental study of the collapse-resistant behavior of RC beam-column sub-structures considering catenary action[J].China Civil Engineering Journal,2011,44(4):52―59.(in Chinese)
[2]Shi Yanchao,Li Zhongxian,Hao Hong.A new method for progressive collapse analysis of RC frames under blast loading[J].Engineering Structures,2010,32(6):1691―1703.
[3]李爽,赵颖,翟长海,等.节点对RC框架结构抗连续倒塌能力影响研究[J].工程力学,2012,29(12):80―87.Li Shuang,Zhao Ying,Zhai Changhai,et al.The influences of joint on the progressive collapse-resisting performance of RC frames[J].Engineering Mechanics,2012,29(12):80―87.(in Chinese)
[4]吴波,黄仕香.结构倒塌时楼板碰撞效应的简化评估方法[J].工程力学,2013,30(3):306―314.Wu Bo,Huang Shixiang.A simplified evaluating method for impacting of floor slabs during structural collapse[J].Engineering Mechanics,2013,30(3):306―314.(in Chinese)
[5]张雷明.灾害荷载下结构倒塌机制研究[D].北京:清华大学,1999.Zhang Leiming.Researches on the collapse mechanisms of structures under disastrous loading[D].Beijing:Tsinghua University,1999.(in Chinese)
[6]易伟建,何庆锋,肖岩.钢筋混凝土框架结构抗倒塌性能的试验研究[J].建筑结构学报,2007,28(5):104―109,117.Yi Weijian,He Qingfeng,Xiao Yan.Collapse performance of RC frame structures[J].Journal of Building Structures,2007,28(5):104―109,117.(in Chinese)
[7]陆新征,林旭川,叶列平,等.地震下高层建筑连续倒塌数值模型研究[J].工程力学,2010,27(11):64―70.Lu Xinzheng,Lin Xuchuan,Ye Lieping,et al.Numerical models for earthquake induced progressive collapse of high-rise buildings[J].Engineering Mechanics,2010,27(11):64―70.(in Chinese)
[8]Mehrdad Sasani,Serkan Sagiroglu.Progressive collapse resistance of hotel San Diego[J].Journal of Structural Engineering,2008,134(3):478―488.
[9]Zhao Dong Xu,Ben Qiang Shi,Ke Yi Wu,et al.Vertical shaking table tests on the structure with viscoelastic multi-dimensional earthquake isolation and mitigation devices[J].Science in China(Series E),2009,52(10):2869―2876.
[10]GSA2003,Progressive collapse analysis and design guidelines for new federal office buildings and major modernization project[S].2013.
[11]谢甫哲,舒赣平,凤俊敏.基于抽柱法的钢框架连续倒塌分析[J].东南大学学报(自然科学版),2010,40(1):154―159.Xie Fuzhe,Shu Ganping,Feng Junmin.Progressive collapse analysis of steel frame structure using removing column method[J].Journal of Southeast University(Natural Science Edition),2010,40(1):154―159.(in Chinese)
[12]徐有邻.混凝土结构理论及规范的发展[J].建筑结构学报,2010,31(6):17―21.Xu Youlin.Development of concrete structure theory and code[J].Journal of Building Structures,2010,31(6):17―21.(in Chinese)
[13]何庆锋,易伟建.考虑悬索作用钢筋混凝土梁柱子结构抗倒塌性能试验研究[J].土木工程学报,2011,44(4):52―59.He Qingfeng,Yi Weijian.Experimental study of the collapse-resistant behavior of RC beam-column sub-structures considering catenary action[J].China Civil Engineering Journal,2011,44(4):52―59.(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