拱式转换层结构的试验研究
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摘要
在理论分析的基础上,对拱式转换层结构在竖向和水平反复荷载作用下的性能,进行了试验研究,表明拱式转换层结构在竖向荷载作用下延性性能较好,能避免脆性破坏,下弦杆施加预应力不仅可以提高下弦杆的抗裂能力,还可以抵消转换层斜腹杆对转换层下部产生的水平推力,改善其力学性能;水平荷载作用下荷载—侧移滞回曲线较饱满,耗能能力较强,延性较好。试验还表明拱式转换层上部楼层较易出现塑性铰,是结构的薄弱部位,按本文原则设计拱式转换层能够满足结构的抗震要求。
On the basis of theoretical analysis,properties of arch transfer floor subjected to vertical and horizontal cyclic loading were experimentally researched.The vertical loading experiment indicates that the arch transfer floor structure can possess relatively good ductility,and avoid brittle destruction.Moreover,not only may the prestressing force in bottom chord enhance the capability of crack resistance of this chord,but also may offset the horizontal thrust of diagonal web member to substructure of the transfer floor,so as to improve on the mechanics performance of the transfer floor.The horizontal cyclic loading experiment shows that the arch transfer floor structure can own full hysteresis loop of load-displacement,great energy dissipation and good ductility.Besides,the result shows that the plastic hinges may develop in the superstructure of the arch transfer floor easily,which may be weak position of the structure.As a result,the arch transfer floor structure designed according to the design principle in this paper,could be satisfied with the aseismic requirements.
On the basis of theoretical analysis,properties of arch transfer floor subjected to vertical and horizontal cyclic loading were experimentally researched.The vertical loading experiment indicates that the arch transfer floor structure can possess relatively good ductility,and avoid brittle destruction.Moreover,not only may the prestressing force in bottom chord enhance the capability of crack resistance of this chord,but also may offset the horizontal thrust of diagonal web member to substructure of the transfer floor,so as to improve on the mechanics performance of the transfer floor.The horizontal cyclic loading experiment shows that the arch transfer floor structure can own full hysteresis loop of load-displacement,great energy dissipation and good ductility.Besides,the result shows that the plastic hinges may develop in the superstructure of the arch transfer floor easily,which may be weak position of the structure.As a result,the arch transfer floor structure designed according to the design principle in this paper,could be satisfied with the aseismic requirements.
引文
[1]张敏、梁炯丰.拱式转换层结构竖向受力分析[J].工业建筑,2008,5(5):46~49.
[2]张敏、梁炯丰.拱式转换层结构多遇地震反应分析[J].工业建筑,2008,10(10):42~47.
[3]Dai Guoliang,Tong Xiaodong,Huang Xianghai,Liang Shuting.Application of laminated vierendeel truss in high-position transferstory structure[J].Journal of Southeast University(English Edi-tion),2005,6(2):49~53.
[4]Li Yu-rong,Qiu Tao,Sun Bin-nan.Elastic-plastic study on highbuilding with SRC transferring story[J].Journal of Zhejiang Uni-versity SCIENCE A,2006,7(3).
[5]Li J.H,R.K.L.Su,A.M.Chandler.Assessment of low-risebuilding with transfer beamunder seismic forces[J].EngineeringStructures 2003(25).
[2]张敏、梁炯丰.拱式转换层结构多遇地震反应分析[J].工业建筑,2008,10(10):42~47.
[3]Dai Guoliang,Tong Xiaodong,Huang Xianghai,Liang Shuting.Application of laminated vierendeel truss in high-position transferstory structure[J].Journal of Southeast University(English Edi-tion),2005,6(2):49~53.
[4]Li Yu-rong,Qiu Tao,Sun Bin-nan.Elastic-plastic study on highbuilding with SRC transferring story[J].Journal of Zhejiang Uni-versity SCIENCE A,2006,7(3).
[5]Li J.H,R.K.L.Su,A.M.Chandler.Assessment of low-risebuilding with transfer beamunder seismic forces[J].EngineeringStructures 2003(25).
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