Advances in Adhesive Joining of Carbon Fibre/Polymer Composites to Steel Members for Repair and Rehabilitation of Bridge Structures
Advances in Adhesive Joining of Carbon Fibre/Polymer Composites to Steel Members for Repair and Rehabilitation of Bridge Structures
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DOI：
10.1260/136943306779369419
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发表时间：
2006-12
影响因子：
2.6
通讯作者：
L. Hollaway;L. Zhang;N. K. Photiou;J. Teng;S. S. Zhang-S.
中科院分区：
文献类型：
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作者：
L. Hollaway;L. Zhang;N. K. Photiou;J. Teng;S. S. Zhang-S.
通常，如果在理想的工厂条件下固化，则使用大多数现代粘合系统相对容易获得高的接头强度。然而，土木工程施工缝是在现场固化的，并且需要在恶劣的环境条件下持续结构构件的寿命。这意味着现场接缝可能不会像工厂制造的那样进行施工和养护。本文比较了两种可能的方法粘结FRP复合材料补片/板的钢被粘体适用于建筑工地。第一种方法采用公认的技术，即使用两部分冷固化粘合剂粘合两种不同的材料。第二种方法采用预浸渍FRP复合板与兼容的薄膜粘合剂，这些比较是通过检查双带对接试验的结果。一种可能的现场技术，使用预浸渍的FRP复合材料升级钢梁，而它是在低频振动载荷下的调查，这代表了一个钢桥不断下穿越交通的维修。对接测试结果表明，平均而言，预浸渍复合材料与薄膜粘合剂结合导致比冷固化粘合剂技术高15%的破坏载荷。修复梁试验的结果表明，预浸渍CFRP复合材料和钢被粘物之间的粘结接头没有遭受任何显着的损害，从低频率振动施加在钢梁在固化期间。
Generally, it is relatively easy to obtain a high joint strength with most modern bonding systems if these are cured under ideal factory conditions. However, civil engineering construction joints are cured on site and are required to last the lifetime of the structural member in harsh environmental conditions. This implies that site joints might not be constructed and cured as well as those fabricated in the factory. The paper compares two possible methods for bonding an FRP composite patch/plate to a steel adherend suitable for construction sites. The first method utilises the accepted technique of bonding two dissimilar materials using a two-part cold cure adhesive. The second method employs a pre-impregnated FRP composite plate in conjunction with a compatible film adhesive; these comparisons are undertaken by examining the results of double-strap butt joint tests. A possible site technique using the pre-impregnated FRP composite to upgrade a steel beam whilst it is under a low frequency vibration load is investigated; this represents the repair of a steel bridge constantly under traversing traffic. The butt joint test results show that on average, the pre-impregnated composite in conjunction with the film adhesive leads to a failure load which is 15% higher than that of the cold setting adhesive technique. The results of the rehabilitated beam tests show that the bonded joint between the pre-impregnated CFRP composite and the steel adherend did not suffer any significant damage from the low frequency vibrations imposed upon the steel beam during the cure period.