TY - CHAP A1 - Finckh, Wolfgang A1 - Niedermeier, Roland T1 - Example 4: Strengthening a reinforced concrete column by wrapping T2 - Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples KW - Betonbauteil KW - Bewehrung KW - Lamelle KW - Kohlenstofffaserverstärkter Kunststoff KW - Kleben KW - Tragfähigkeit KW - Bemessung KW - Gewirke KW - Kohlenstofffaser Y1 - 2014 SN - 978-3-410-65255-7 SN - 0171-7197 SP - 115 EP - 125 PB - Beuth CY - Berlin ; Wien ; Zürich ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad T1 - Comparison of Guidelines for Externally Bonded Reinforcement T2 - Codes in structural engineering - Developments and needs for international practice ; joint IABSE - fib conference, Dubrovnik, Croatia, May 3 - 5, 2010 Y1 - 2010 SN - 978-9537621087 CY - Zagreb ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad T1 - Influence of member-specific effects the bond force transfer of reinforced concrete strengthened with externally bonded CFRP-strips T2 - Proceedings of the Fourth International Symposium "Bond in concrete 2012: Bond, Anchorage, Detailing" -Brescia, Italy, 17th - 20th June 2012. Volume 2: Bond in New Materials and Under Severe Conditions Y1 - 2012 SN - 978-88-907078-3-4 SN - 8890707836 PB - Publisher creation CY - Manerbio ER - TY - JOUR A1 - Finckh, Wolfgang A1 - Zilch, Konrad T1 - Strengthening and Rehabilitation of Reinforced Concrete Slabs with Carbon-Fiber Reinforced Polymers Using a Refined Bond Model JF - Computer-Aided Civil and Infrastructure Engineering N2 - Slabs are one of the main load-bearing elements in nearly every structure. Because of additional live loads or modifications of the building structure these slabs often have to be strengthened. Using externally bonded carbon-fiber reinforced polymer (CFRP) strips to strengthen existing concrete structures has become common practice. One of the main failure modes is the loss of the composite action between the concrete and the CFRP strip making the bond force transfer very important. This bond force transfer depends on many parameters including the concrete strength, the ratio between shear force, and bending moment. A new parameter recently discovered by the Technische Universität München (TUM) is the deflection of the structural elements themselves. Because of this deflection self-inducted contact pressure occurs. This contact pressure affects a higher bond transfer. The lower effective depth of slabs compared to beams causes higher deflections. In this article, first a few principles on the strengthening with adhesive-bonded CFRP strips and the characteristics of the bond are explained. Then, the basics of the bond force transfer, at the end anchorage and in the rest of the element, are summarized. Based on these essentials, as well as numerous experiments, the change in the bond force transfer at the structural element caused by the curvature is then derived. With these findings, a complete verification concept is presented, which is ideal for computerized calculations. This verification concept is finally compared to several full-scale test results presented in pertinent literature. Y1 - 2012 U6 - https://doi.org/10.1111/j.1467-8667.2011.00752.x VL - 27 IS - 5 SP - 333 EP - 346 PB - Wiley ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Schmitt, Alexander A1 - Zilch, Konrad T1 - Example 1: Strengthening a slab with externally bonded CFRP strips T2 - Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples KW - Betonbauteil KW - Bewehrung KW - Lamelle KW - Kohlenstofffaserverstärkter Kunststoff KW - Kleben KW - Tragfähigkeit KW - Bemessung KW - Gewirke KW - Kohlenstoffaser Y1 - 2014 SN - 978-3-410-65255-7 SN - 0171-7197 SP - 47 EP - 68 PB - Beuth CY - Berlin ; Wien ; Zürich ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Niedermeier, Roland A1 - Schmitt, Alexander A1 - Zilch, Konrad T1 - Example 3: Strengthening a T-beam with externally bonded CFRP strips T2 - Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples KW - Betonbauteil KW - Bewehrung KW - Lamelle KW - Kohlenstofffaserverstärkter Kunststoff KW - Kleben KW - Tragfähigkeit KW - Bemessung KW - Gewirke KW - Kohlenstoffaser Y1 - 2014 SN - 978-3-410-65255-7 SN - 0171-7197 SP - 115 EP - 125 PB - Beuth CY - Berlin ; Wien ; Zürich ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Schmitt, Alexander A1 - Zilch, Konrad T1 - Example 2: Strengthening a slab with near surface mounted CFRP strips T2 - Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples KW - Betonbauteil KW - Bewehrung KW - Lamelle KW - Kohlenstofffaserverstärkter Kunststoff KW - Kleben KW - Tragfähigkeit KW - Bemessung KW - Gewirke KW - Kohlenstoffaser Y1 - 2014 SN - 978-3-410-65255-7 SN - 0171-7197 SP - 69 EP - 86 PB - Beuth CY - Berlin ; Wien ; Zürich ER - TY - CHAP A1 - Zilch, Konrad A1 - Niedermeier, Roland A1 - Finckh, Wolfgang ED - Oehlers, Deric John ED - Griffith, Michael C. ED - Seracino, R. T1 - Guideline for the Performance and Interpretation of Bond Tests on Concrete Specimens with Externally Bonded CFRP Strips T2 - Proceedings of the 9th International Symposium on Fibre Reinforced Polymers in Reinforced Concrete Structures (FRPRCS-9), 13.07. - 15.07.2009, Sydney, Australia Y1 - 2009 SN - 978-0-9806755-0-4 PB - [Univ ersity of Adelaide] CY - [Adelaide] ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad A1 - Ellinger, Mathias ED - Motavalli, Masoud T1 - Evaluating the bond stress relationship of externally bonded CFRP-strips at the intermediate crack element T2 - Smart monitoring, assessment and rehabilitation of civil structures : proceedings of SMAR 2011, First Middle East Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, Dubai, UAE, 8-10 February 2011 at AUD, American University in Dubai UAE N2 - When reinforced concrete is strengthened by using externally bonded CFRP strips it is not sufficient to perform checks just for the end anchorages. The bond forces must be transferred where the load is applied. These bond forces may be transferred by the elements in between flexural cracks which are mainly influenced by the bond behavior of the internal and external reinforcing. Therefore the models which were derived from end anchorage tests must be expanded to include other effects as well. These models were first described theoretically by the differential equation of bond and a bilinear bond stress slippage relationship. To evaluate this theoretically derived relationship numerous experiments on the intermediate crack elements where conducted. In this paper, an evaluation of these experiments in two different ways is shown. The one evaluation is carried out only on the fracture force, the other analysis also takes the slippage occurred in the intermediate crack element tests into account. With both evaluations it can be shown, that besides the previously scheduled bilinear bond approach additional friction effects between the already decoupled fracture surfaces of the bonded strips occur. Y1 - 2011 UR - https://data.smar-conferences.org/SMAR_2011_Proceedings/papers/97.pdf SN - 978-3-905594-58-4 SP - 1 EP - 9 PB - EMPA CY - [Dübendorf] ET - 1 CD-ROM ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad ED - Ye, Lieping ED - Feng, Peng ED - Yue, Qingrui T1 - Evaluation of the bond behavior at the intermediate crack element with a special test procedure T2 - Advances in FRP Composites in Civil Engineering : Proceedings of the 5th International Conference on FRP Composites in Civil Engineering (CICE 2010), Sep 27-29, 2010, Beijing, China N2 - The bond behavior of externally bonded reinforcement is one main parameter for the load bearing capacity of strengthened reinforced concrete structures. Because of the low bond force transfer at the outmost bending crack, the bond forces have also been transferred to elements between the cracks in order to effectively utilize the permissible stress of the CFRP strip. Two different experimental series on the bond behavior on the intermediate crack element were carried out. Small tests on an idealized intermediate crack element were made to evaluate the bond stress increase. In the second series parts of a structural element, which had the length of an intermediate crack element were tested to find out about other effects which only occur in the structural element. Based on these experimental data and the differential equation of the sway bond a new concept for the bond behavior of externally bonded reinforcement has been found out. Y1 - 2011 SN - 978-3-642-17486-5 SN - 978-3-642-17487-2 U6 - https://doi.org/10.1007/978-3-642-17487-2_111 SP - 517 EP - 520 PB - Springer CY - Berlin ; Heidelberg ER - TY - CHAP A1 - Zilch, Konrad A1 - Niedermeier, Roland A1 - Finckh, Wolfgang ED - Motavalli, Masoud T1 - New German guideline for strengthening concrete structures with adhesive bonded reinforcement T2 - Smart monitoring, assessment and rehabilitation of civil structures, Proceedings of SMAR 2011, First Middle East Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, Dubai, UAE, 8 - 10 February 2011 at AUD, American University in Dubai UAE Y1 - 2011 SN - 978-3-905594-58-4 PB - EMPA ET - 1 CD-ROM Ill., graph. Darst. 1 Buch (212 S.) ER - TY - CHAP A1 - Gläser, Christian A1 - Jung-Saeng, A. A1 - Finckh, Wolfgang T1 - Recent developments of spliced segmental griders using enhanced post tensioning systems T2 - Third international fib congress incorporating the PCI annual convention and bridge conference 2010, May 29-June 2, 2010, Washington, D.C. Y1 - 2010 PB - Precast/Prestressed Concrete Institute, CY - Chicago, IL ET - 1 DVD-ROM ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad T1 - Influence of the curvature on the bond force transfer of EBR T2 - 10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011 : Tampa, Florida, USA, 2 - 4 April 2011 KW - Beton KW - Faserverstärkter Kunststoff Y1 - 2011 SN - 978-1-61839-203-9 PB - Curran CY - Red Hook, NY ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad T1 - Specific structural effects on the bond force transfer of reinforced concrete strengthened with externally bonded CFRP-strips T2 - Building Materials and Building Technology to Preserve the Built Heritage Y1 - 2011 SN - 978-3-937066-21-9 CY - Brno ER - TY - CHAP A1 - Finckh, Wolfgang A1 - Zilch, Konrad T1 - Strengthening and rehabilitation of reinforced concrete slabs with CFRP T2 - International conference on high rise towers and tall building 2010, April 14-16, Munich Y1 - 2010 CY - München ER -