冻融循环下CFRP-混凝土的粘结强度

对于采用纤维增强复合材料加固的混凝土结构,粘结面是关键问题。粘结面与混凝土、组合结构、粘结剂的力学和物理性能以及混凝土的表面处理密切相关。土木工程应用中的一个重要课题是恶劣环境下粘结面的耐久性问题。首次对试件进行冻融循环下剥离试验,以研究粘结长度和环境的关系。首先探讨了环境条件对粘结长度的影响,最后,试验数据与意大利CNR DT200/2004标准中的设计公式结果进行比较并提出建议。

Bond Strength of CFRP-Concrete Elements Under Freeze-Thaw Cycles

Bonding between the adherents represents a key point when dealing with the reinforcement of concrete structures by using FRPs.Bonding depends on mechanical and physical properties of concrete,composite and adhesive as well as on the surface treatment of the concrete substrate.A very important topic for civil engineering applications is related to the durability of the bond in harsh environments.In the present paper some specimens were first subjected to freeze-thaw cycles and then experimental debonding tes...