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Development of FP Structural Members for Large-Scale Truss Structure

大型桁架结构FP结构构件的研制

基本信息

批准号：
14550575
负责人：
OSAKA Katsuhiko
金额：
$ 1.15万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550575/
关键词：
Truss structure FRP Bonded joint Optical fiber Peeling Reliability Strain monitoring Damage 引抜成形法金属部分 FW成形法

项目摘要

In the present study, an FRP(Fiber Reinforced Plastics) truss member for a large-scale structure was developed. This FRP member has metal parts bonded at its end with epoxy adhesives. The large-scale truss structure is assembled from these members bolted together in the field. The member was equipped with a strain monitoring system using optical fiber sensors for improving its structural material reliability. First, the internal strain monitoring technique was investigated by using the newly developed strain measurement system with the optical fiber sensors embedded in FRP during molding. After molding, an ability of the sensors for damage detection in the FRP was also examined in strain monitoring experiments. From the results, it was found that the optical fiber sensors have the strain measurement ability during molding of the FRP and their exactresidual strains after molding can be obtained. The sensors could also measure strains in the FRP under cyclic loading conditions and the damage generated in the FRP could be detected by their strain monitoring. Finally, metal-FRP adhesively bonded joint specimens were used for strain monitoring experiments under tensile loading. The experimental results showed that peeling of the bonded area can be detected and its length can be obtained with the strain monitoring by using newly developed strain measurement system.In this study, the FRP members could be developed which were equipped with the strain monitoring system with the optical fiber sensors. This study could yield the basic results of development for the large-scale truss structure assembled with the FRP members having metal jointing parts bonded at the end.

在本研究中，开发了一种用于大型结构的玻璃钢（纤维增强塑料）桁架构件。该FRP构件在其端部具有用环氧树脂粘合剂粘合的金属部件。大型桁架结构是由这些构件在现场用螺栓连接在一起组装而成的。该构件配备了使用光纤传感器的应变监测系统，以提高其结构材料的可靠性。首先，内部应变监测技术进行了研究，通过使用新开发的应变测量系统与光纤传感器嵌入在FRP成型过程中。成型后，在应变监测实验中还检查了传感器的FRP中的损伤检测能力。结果表明，光纤传感器具有测量FRP成型过程中应变的能力，并可获得成型后FRP的准确残余应变。传感器还可以测量在循环载荷条件下FRP中的应变，并且可以通过其应变监测来检测FRP中产生的损伤。最后，对金属-FRP粘结接头试件进行了拉伸加载下的应变监测试验。试验结果表明，利用新开发的应变测量系统，可以检测出粘结区的剥离情况，并通过应变监测获得剥离长度，本研究可以开发出配备光纤传感器的应变监测系统的FRP构件。本研究可提供端部有金属连接件之FRP构件组装大型桁架结构发展之基本成果。