结构胶植筋锚固可靠度分析及设计建议

Reliability Analysis on Anchoring Design Length of Bars Embedded in Concrete by Chemistry Adhesive

混凝土结构的粘结锚固问题,不仅在工程实践上很重要(如钢筋的锚固,搭接和细部构造),而且在理论上也具有重要意义.在承载能力和使用极限状态下,钢筋强度能否得到利用取决于粘结的有效程度,近年来有关地震灾害的调查表明,强震下很多混凝土结构毁于粘结锚固破坏.本文由可靠度分析求得了具有一定可靠度的建筑结构胶植筋锚固长度,并在此基础上提出了与‘混凝土结构设计规范'相一致的、采用计算确定结构胶植筋锚固长度的设计方法,可供工程设计参考.

Bond-anchorage of concrete structure is important not only for in-field project （such as anchoring, connection and detailed construction of bars）, but also for academic analysis. With loading and regular service reaching the maximum, the exertion of strength of bars lies in the validity of bond-anchorage. Recent investigation indicates that many concrete structures are destroyed by bond-anchorage failure in violent earthquakes. With the help of reliability analysis, the anchoring design length of bars embedded in concrete by chemistry adhesive is proposed in accordance with Concrete Structure Design Code （GB50010）, which can give some clues for engineering design.