双撑杆横张智能预应力梁设计参数数值分析
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摘要
运用ANSYS软件计算分析了双撑杆横张智能预应力简支梁中智能伸缩杆的布置方式、预应力索的截面面积以及智能伸缩杆的顶升方式这3个因素对系统消耗的能量、智能伸缩杆的杆力和智能伸缩杆的伸长量这3个性能评价指标的影响.分析结果表明:智能伸缩杆的初始杆长越长,性能指标越好;智能伸缩杆应对称布置在梁跨度的1/4和3/4附近;预应力筋的截面抗拉刚度越大,性能指标越好;不同顶升方式之间,智能伸缩杆耗能的差别很小,可采用同步顶升.
Based on the design parameters of smart prestressed beam with two struts,the impacts of strut's collocation and tendon's area and jack-up's mode on the system energy dissipation and the strut force and the strut extension are analyzed by using ANSYS software.The results show that the longer the initial length of struts,the better the performance index of smart prestressed beam,and the struts should be symmetrically disposed in the 1/4 and 3/4 of the beam span.In addition,the higher the tensile stiffness of prestressing tendon,the better the performance index of smart prestressed beam,and the difference of system energy dissipation is little between the different jack-up modes.
Based on the design parameters of smart prestressed beam with two struts,the impacts of strut's collocation and tendon's area and jack-up's mode on the system energy dissipation and the strut force and the strut extension are analyzed by using ANSYS software.The results show that the longer the initial length of struts,the better the performance index of smart prestressed beam,and the struts should be symmetrically disposed in the 1/4 and 3/4 of the beam span.In addition,the higher the tensile stiffness of prestressing tendon,the better the performance index of smart prestressed beam,and the difference of system energy dissipation is little between the different jack-up modes.
引文
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[2]Choi S,Lee J J.The shape control of composite beamwith embedded memory alloy wire actuators[J].SmartMaterial and Structures,1998,7(6):759-770.
[3]欧进萍,关新春.土木工程智能结构体系的研究与发展[J].地震工程与工程振动,1999,19(2):21-28.Ou Jinping,Guan Xinchun.State-of-the-art of smartstructural systems in civil engineering[J].EarthquakeEngineering and Engineering Vibration,1999,19(2):21-28.(in Chinese)
[4]李宏男,阎石,林皋.智能结构控制发展综述[J].地震工程与工程振动,1999,19(2):29-36.Li Hongnan,Yan Shi,Lin Gao.State-of-the-art reviewfor intelligent structural control[J].Earthquake Engi-neering and Engineering Vibration,1999,19(2):29-36.(in Chinese)
[5]Ribeiro do Carmo Pacheco Pedro Alvares,AdΙo da Fon-seca Antnio Manuel.Organic prestressing[J].Jour-nal of Structural Engineering,2002,128(3):400-405.
[6]Deng Z C,Li Q B,Sun H J.Behavior of concretebeam with embedded shape memory alloy wires[J].Engineering Structures,2006,28(12):1691-1697.
[7]吕志涛.高速铁路桥梁建设中的结构问题[J].建筑科学与工程学报,2006,23(3):1-6.LZhitao.Structural problems in high-speed railwaybridge construction[J].Journal of Architecture andCivil Engineering,2006,23(3):1-6.(in Chinese)
[8]徐伟炜,吕志涛,丁汉山.智能预应力梁的变位控制理论及方法[J].公路交通科技,2006,23(12):67-71.Xu Weiwei,L櫣Zhitao,Ding Hanshan.Deformationcontrol theory and method of smart prestressed beam[J].Journal of Highway and Transportation Researchand Development,2006,23(12):67-71.(in Chinese)
[9]Li Lei,Li Qingbin,Zhang Fan.Behavior of smart con-crete beams with embedded shape memory alloy bundles[J].Journal of Intelligent Material Systems and Struc-tures,2007,18(10):1003-1014.
[10]徐伟炜.智能预应力技术研究[D].南京:东南大学土木工程学院,2007.
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