武汉市游泳馆屋顶网架结构安全预警方法研究
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摘要
以武汉市游泳馆屋顶网架结构为工程背景,根据屋顶网架结构的特点,研究了该结构的安全预警方法。考虑到屋顶设置了"V"型天窗,天窗处积雪是该结构的最大安全隐患。因此,合理建立积雪的天窗有限元模型和识别积雪厚度是此结构安全预警实现的关键。据此,基于雪的唯象本构关系,根据武汉市的气候特点,建立了适合于结构安全预警的积雪天沟板有限元模型。根据天窗处天沟板的应变与积雪厚度存在着一一对应的映射关系,通过在网架结构易积雪的天窗处布置应变传感器采集应变信息,采用模糊模式识别理论,实时自动识别作用在网架结构天窗处的积雪厚度,达到对该网架结构的积雪厚度进行安全预警的目的。
Taking roof latticed structure of Wuhan Natatorium as engineering background,according to the structural characteristics,the structural safety early-warning method is proposed in the paper.It is great trouble of Wuhan Natatorium roof since the "V" shape skylights located on the roof.Therefore,the key to realize the structural safety early-warning is to establish finite element model of "V" shape skylights acted by snow load and to detect firn thickness on the roof.Based on the phenomena constitutive equation of snow,the finite element model of gutter board with firn used for structural safety early-warning is established according to climate characteristics of Wuhan city.Due to the map relationship between the strains of "V" shape skylight with firn thickness,the strain information is measured by strain gauges installed on the "V" shape skylights;the firn thickness is detected by fuzzy pattern identification methods.The target of safe early-warning for firn thickness of the latticed structure can be achieved.
Taking roof latticed structure of Wuhan Natatorium as engineering background,according to the structural characteristics,the structural safety early-warning method is proposed in the paper.It is great trouble of Wuhan Natatorium roof since the "V" shape skylights located on the roof.Therefore,the key to realize the structural safety early-warning is to establish finite element model of "V" shape skylights acted by snow load and to detect firn thickness on the roof.Based on the phenomena constitutive equation of snow,the finite element model of gutter board with firn used for structural safety early-warning is established according to climate characteristics of Wuhan city.Due to the map relationship between the strains of "V" shape skylight with firn thickness,the strain information is measured by strain gauges installed on the "V" shape skylights;the firn thickness is detected by fuzzy pattern identification methods.The target of safe early-warning for firn thickness of the latticed structure can be achieved.
引文
[1]顾明,赵明伟,全涌.结构台风灾害风险评估研究进展[J].同济大学学报,2009,37(5):569-574.
[2]孙鸿敏,李宏男.土木工程结构健康监测研究进展[J].防灾减灾工程学报,2003,23(3):92-98.
[3]瞿伟廉,滕军,项海帆,等.风力作用下深圳市民中心屋顶网架结构的智能健康监测[J].建筑结构学报,2006,27(1):1-8.
[4]刘晖,杨莉,王锦文,等.武汉游泳馆屋顶网架结构安全预警系统雪荷载模糊模式识别[J].武汉理工大学学报,2008,30(11):130-132.
[5]邓洪超.积雪路面GPR探测信号处理与雪铲自动控制研究[D].长春:吉林大学,2007.
[6]Scapozza C,Bartelt P.Triaxial Tests on Snow at Low Strain Rate,PartⅡ,Constitutive Behaviour[J].Journal ofGlaciology,2003,49(164):91-101.
[7]Navarre J P.3D Numerical Model of Snow Deformation Without Failure and Its Application to Cold Room MechanicalTests[J].Cold Regions Science and Technology,2007,50:3-12.
[8]王清涛.基于模糊模式识别的风力作用高耸结构应力场的识别[D].武汉:武汉理工大学,2008.
[9]舒宁,马洪超,孙和利.模式识别的理论与方法[M].武汉:武汉大学出版社,2004.
[10]谢季坚,刘承平.模糊数学方法及其应用[M].武汉:华中科技大学出版社,2000.
[11]瞿伟廉,陈超,汪菁.深圳市民中心屋顶网架结构支撑钢牛腿瞬时应力场的识别[J].地震工程与工程振动,2002,22(4):41-46.
[2]孙鸿敏,李宏男.土木工程结构健康监测研究进展[J].防灾减灾工程学报,2003,23(3):92-98.
[3]瞿伟廉,滕军,项海帆,等.风力作用下深圳市民中心屋顶网架结构的智能健康监测[J].建筑结构学报,2006,27(1):1-8.
[4]刘晖,杨莉,王锦文,等.武汉游泳馆屋顶网架结构安全预警系统雪荷载模糊模式识别[J].武汉理工大学学报,2008,30(11):130-132.
[5]邓洪超.积雪路面GPR探测信号处理与雪铲自动控制研究[D].长春:吉林大学,2007.
[6]Scapozza C,Bartelt P.Triaxial Tests on Snow at Low Strain Rate,PartⅡ,Constitutive Behaviour[J].Journal ofGlaciology,2003,49(164):91-101.
[7]Navarre J P.3D Numerical Model of Snow Deformation Without Failure and Its Application to Cold Room MechanicalTests[J].Cold Regions Science and Technology,2007,50:3-12.
[8]王清涛.基于模糊模式识别的风力作用高耸结构应力场的识别[D].武汉:武汉理工大学,2008.
[9]舒宁,马洪超,孙和利.模式识别的理论与方法[M].武汉:武汉大学出版社,2004.
[10]谢季坚,刘承平.模糊数学方法及其应用[M].武汉:华中科技大学出版社,2000.
[11]瞿伟廉,陈超,汪菁.深圳市民中心屋顶网架结构支撑钢牛腿瞬时应力场的识别[J].地震工程与工程振动,2002,22(4):41-46.
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