| Title | Shear strength of dry keyed joints and comparison with different formulations |
|---|---|
| Authors | ALCALDE RICO, MARÍA, Cifuentes H. , Medina F. |
| External publication | Si |
| Means | FraMCoS 2013 |
| Scope | Conference Paper |
| Nature | Científica |
| Area | International |
| Web | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879939844&partnerID=40&md5=fb9b986cb1fafdbf596d09e95c95913b |
| Publication date | 01/01/2013 |
| Scopus Id | 2-s2.0-84879939844 |
| Abstract | The shear strength of multiple-keyed joints is a very important part of the design of prestressed segmental concrete structures. This type of structures is widely used but the formulations of different design codes deal to different values of the shear strength of joints. In this paper, it has been developed a finite element model of four different types of joints, with a number of keys varying between one and seven. The brittle cracking model was used for the material. The material model has been calibrated and validated using the P-d curve from single edge notched beams subjected to three-point-bending test. The model has been tested comparing the predicted response with the experimental results for one and three keys. Then, it has been analysed the behaviour of joints and their dependence on the number of keys. The results have been compared with the formulation of different codes and authors. The results show that the average shear stress transferred across the dry keyed joints decreases with the number of keys but this effect is less appreciated as the compression stress acting on the joint increases. Comparing with the formulas of design codes, the ATEP formula underestimates the shear capacity of the joints, and AASHTO formula overestimates it in the case of multiple keys and low prestressing force. |
| Keywords | Concrete buildings; Concrete construction; Fracture mechanics; Prestressed concrete; Shear strength; Average shear stress; Compression stress; Material models; Prestressing forces; Segmental structure; Shear strength of joint; Single edge notched beams; Three-point-bending tests; Structural design |
| Universidad Loyola members |