光纤传感技术在网架结构健康检测中应用
|
摘要
网架结构是由杆件和节点按一定规律组成的空间结构,这些杆件通常是大量钢管构件,在荷载作用下承受轴向压力或拉力.了解网架在使用过程中的受力状态,就可以比较实际结构响应与理论计算的差距,从而判断结构是否处于正常工作状态.本文研制了应用于钢管构件内力测试的网架结构无损检测系统及装置,特别是根据网架结构构件特点开发了一种可装卸的光纤传感器专用夹具,通过实验验证了该检测装置传力的可靠性.这种检测装置具有无损网架构件、不产生残余应力、安装方便的优点.同时,文中介绍某大型平板网架工程利用这种可装卸式光纤光栅装置系统进行实际结构测试的情况.
Space truss structures are composed of members and nodes by some rules.The members are usually steel tubes and in axial force subject to external load.In order to understand the mechanical state of the space truss in the period of service,comparison between the practical response and theory solution of the structure subjected to loading is conducted to estimate whether the structure is under normal working state.In this paper,the non-destructive detection equipment of spatial truss which was applied to the detection of internal force of the steel tubes was developed.A kind of special clamp used together with the fiber Bragg grating sensors which can be assembled and unassembled conveniently was also developed according to the traits of spatial truss structures.The experimental results showed that the interned force of the members of spatial truss structures can be transferred reliably to the fiber Bragg grating sensors through this detection equipment.The detection equipment has a lot of nerits such as no destrution of steel bubes,converience for installation and no produce of residual stress.In addition,the health detection for a large plane spatial truss project using this equipment was introduced.
Space truss structures are composed of members and nodes by some rules.The members are usually steel tubes and in axial force subject to external load.In order to understand the mechanical state of the space truss in the period of service,comparison between the practical response and theory solution of the structure subjected to loading is conducted to estimate whether the structure is under normal working state.In this paper,the non-destructive detection equipment of spatial truss which was applied to the detection of internal force of the steel tubes was developed.A kind of special clamp used together with the fiber Bragg grating sensors which can be assembled and unassembled conveniently was also developed according to the traits of spatial truss structures.The experimental results showed that the interned force of the members of spatial truss structures can be transferred reliably to the fiber Bragg grating sensors through this detection equipment.The detection equipment has a lot of nerits such as no destrution of steel bubes,converience for installation and no produce of residual stress.In addition,the health detection for a large plane spatial truss project using this equipment was introduced.
引文
[1]罗尧治,吴玄成.干煤棚网壳结构使用现状与缺陷分析[J].工业建筑,2005,35(5):88-91.
[2]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90.
[3]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.
[4]欧进萍.重大工程结构的积累损伤与安全评定[A].走上21世纪的中国力学——中国科协第9次“青年科学家论坛”[C],北京,1996:179-189.
[5]梁磊,姜德生,罗裴,汪术文等.光纤B ragg光栅在结构健康诊断中的实验研究[J].山东理工大学学报(自然科学版),2003,17(3):4-7.
[6]赵雪峰,田石柱,周智,等.基于封装光纤B ragg光栅传感器的混凝土应变监测试验研究[J].光学技术,2003,29(4):423-426.
[7]梁磊,罗裴,周雪芳,等.光纤光栅用于混凝土结构应变模态检测的研究[J].中国水泥,2003(8):35-37.
[8]董志明.光纤布喇格光栅原理及在土木工程中的应用[J].矿业科学技术,2003(1):13-17.
[9]万里冰,武湛君,张博明,等.埋光纤光栅传感器智能土木结构应变检测[J].力学与实践,2003,25(4):35-38.
[10]D ong X inyong,L iu Y unq i,L iu Zh iguo,et a l.S im u l-taneous d isp lacem en t and tem perature m easurem en tw ith can tilever-based fiber B ragg grating sensor[J].O ptics Comm un ications,2001,192(3):213-217.
[11]X iaom ing T ao,L iqun T ang,et a l.In terna l stra inm easurem en t by fiber B ragg grating sensors in tex tilecom pos ites[J].Com epos ite Sc ience and T echno logy,2000,60(5):657-669.
[12]李宏男,李东升,赵柏东.光纤健康监测方法在土木工程中的研究与应用进展[J].地震工程与工程振动,2002,22(6):76-83.
[2]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90.
[3]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.
[4]欧进萍.重大工程结构的积累损伤与安全评定[A].走上21世纪的中国力学——中国科协第9次“青年科学家论坛”[C],北京,1996:179-189.
[5]梁磊,姜德生,罗裴,汪术文等.光纤B ragg光栅在结构健康诊断中的实验研究[J].山东理工大学学报(自然科学版),2003,17(3):4-7.
[6]赵雪峰,田石柱,周智,等.基于封装光纤B ragg光栅传感器的混凝土应变监测试验研究[J].光学技术,2003,29(4):423-426.
[7]梁磊,罗裴,周雪芳,等.光纤光栅用于混凝土结构应变模态检测的研究[J].中国水泥,2003(8):35-37.
[8]董志明.光纤布喇格光栅原理及在土木工程中的应用[J].矿业科学技术,2003(1):13-17.
[9]万里冰,武湛君,张博明,等.埋光纤光栅传感器智能土木结构应变检测[J].力学与实践,2003,25(4):35-38.
[10]D ong X inyong,L iu Y unq i,L iu Zh iguo,et a l.S im u l-taneous d isp lacem en t and tem perature m easurem en tw ith can tilever-based fiber B ragg grating sensor[J].O ptics Comm un ications,2001,192(3):213-217.
[11]X iaom ing T ao,L iqun T ang,et a l.In terna l stra inm easurem en t by fiber B ragg grating sensors in tex tilecom pos ites[J].Com epos ite Sc ience and T echno logy,2000,60(5):657-669.
[12]李宏男,李东升,赵柏东.光纤健康监测方法在土木工程中的研究与应用进展[J].地震工程与工程振动,2002,22(6):76-83.
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