碳纤维增强复合材料索锚固体系的耐久性及优化设计研究

项目名称： 碳纤维增强复合材料索锚固体系的耐久性及优化设计研究

项目编号： No.51208269

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 诸葛萍

作者单位： 宁波大学

项目金额： 25万元

中文摘要： 碳纤维增强复合材料（CFRP）索在桥梁工程中的应用有越来越广泛的趋势，而对CFRP索的应用产生重要影响的锚固耐久性及考虑耐久性后的锚固优化设计理论有待研究。本研究在申请者对CFRP索锚固体系锚固机理和静动力性能前期研究工作的基础上，围绕设计使用寿命内锚固体系的锚固耐久性和锚固优化设计理论研究问题，从长期荷载和多种不利环境共同作用对锚固区CFRP索-粘结介质界面粘结性能的影响、锚固体系锚固效率和锚固区蠕变松弛情况的影响及考虑耐久性后的锚固体系优化设计理论三个方面开展研究。通过长期荷载及多种不利环境因素耦合作用加速腐蚀试验，测定在各不利因素耦合作用下锚固区粘结界面的粘结性能和锚固体系锚固效率的退化，以及锚固区粘结介质的蠕变和CFRP索的松弛情况，再利用试验结果开展老化后锚固区力学行为理论分析，最终建立起满足设计使用寿命要求的CFRP索锚固优化设计理论，促进CFRP索在土建工程中的应用。

中文关键词： 碳纤维增强复合材料；桥梁工程；耐久性；腐蚀；锚固

英文摘要： The applications of carbon fiber reinforced plastic (CFRP) cable get increasing in bridge engineering. However, the anchorage durability and optimization design theory that the durability is considered of the anhorage system are still considered as the two issues for current research. In this project, based on the preliminary findings of anchorage mechanism and the static and dynamic behavior of CFRP cable anchorage system, the two issues will be studied. Three aspects of the focus are long-term loadling and various adverse environmental factors effect on the bonding properties over the interface of CFRP cable-adhesive in the anchorage zone, the anchorage efficiency coefficient of anchorage system and the creep of adhesive mortar and relaxation of CFRP cable in the anchorage zone and the optimization design theory with consideration of durability of the system. The accelerated corrosion tests about the degradation of mechanical properties over the bonding interface and anchorage efficiency coefficient to the anchorage system and the creep of mortar and the relaxation of CFRP cable in the anchorage zone will be conducted. The long-term loads and various adverse environmental factors are considered during the tests. The mechanical analyzing of the aging anchorage system will be carried out base on the testing res

英文关键词： carbon fiber reinforced plastic (CFRP)；bridge engineering；durability；corrosion；achorage