@incollection{FinckhNiedermeier, author = {Finckh, Wolfgang and Niedermeier, Roland}, title = {Example 4: Strengthening a reinforced concrete column by wrapping}, series = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, booktitle = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, publisher = {Beuth}, address = {Berlin ; Wien ; Z{\"u}rich}, isbn = {978-3-410-65255-7}, issn = {0171-7197}, pages = {115 -- 125}, subject = {Betonbauteil}, language = {en} } @inproceedings{FinckhZilch, author = {Finckh, Wolfgang and Zilch, Konrad}, title = {Comparison of Guidelines for Externally Bonded Reinforcement}, series = {Codes in structural engineering - Developments and needs for international practice ; joint IABSE - fib conference, Dubrovnik, Croatia, May 3 - 5, 2010}, booktitle = {Codes in structural engineering - Developments and needs for international practice ; joint IABSE - fib conference, Dubrovnik, Croatia, May 3 - 5, 2010}, address = {Zagreb}, isbn = {978-9537621087}, language = {en} } @inproceedings{FinckhZilch, author = {Finckh, Wolfgang and Zilch, Konrad}, title = {Influence of member-specific effects the bond force transfer of reinforced concrete strengthened with externally bonded CFRP-strips}, series = {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}, booktitle = {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}, publisher = {Publisher creation}, address = {Manerbio}, isbn = {978-88-907078-3-4}, language = {en} } @article{FinckhZilch, author = {Finckh, Wolfgang and Zilch, Konrad}, title = {Strengthening and Rehabilitation of Reinforced Concrete Slabs with Carbon-Fiber Reinforced Polymers Using a Refined Bond Model}, series = {Computer-Aided Civil and Infrastructure Engineering}, volume = {27}, journal = {Computer-Aided Civil and Infrastructure Engineering}, number = {5}, publisher = {Wiley}, doi = {10.1111/j.1467-8667.2011.00752.x}, pages = {333 -- 346}, abstract = {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 Universit{\"a}t M{\"u}nchen (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.}, language = {en} } @incollection{FinckhSchmittZilch, author = {Finckh, Wolfgang and Schmitt, Alexander and Zilch, Konrad}, title = {Example 1: Strengthening a slab with externally bonded CFRP strips}, series = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, booktitle = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, publisher = {Beuth}, address = {Berlin ; Wien ; Z{\"u}rich}, isbn = {978-3-410-65255-7}, issn = {0171-7197}, pages = {47 -- 68}, subject = {Betonbauteil}, language = {en} } @incollection{FinckhNiedermeierSchmittetal., author = {Finckh, Wolfgang and Niedermeier, Roland and Schmitt, Alexander and Zilch, Konrad}, title = {Example 3: Strengthening a T-beam with externally bonded CFRP strips}, series = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, booktitle = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, publisher = {Beuth}, address = {Berlin ; Wien ; Z{\"u}rich}, isbn = {978-3-410-65255-7}, issn = {0171-7197}, pages = {115 -- 125}, subject = {Betonbauteil}, language = {en} } @incollection{FinckhSchmittZilch, author = {Finckh, Wolfgang and Schmitt, Alexander and Zilch, Konrad}, title = {Example 2: Strengthening a slab with near surface mounted CFRP strips}, series = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, booktitle = {Commentary on the DAfStb guideline "Strengthening of concrete members with adhesively bonded reinforcement" with examples}, publisher = {Beuth}, address = {Berlin ; Wien ; Z{\"u}rich}, isbn = {978-3-410-65255-7}, issn = {0171-7197}, pages = {69 -- 86}, subject = {Betonbauteil}, language = {en} } @inproceedings{ZilchNiedermeierFinckh, author = {Zilch, Konrad and Niedermeier, Roland and Finckh, Wolfgang}, title = {Guideline for the Performance and Interpretation of Bond Tests on Concrete Specimens with Externally Bonded CFRP Strips}, series = {Proceedings of the 9th International Symposium on Fibre Reinforced Polymers in Reinforced Concrete Structures (FRPRCS-9), 13.07. - 15.07.2009, Sydney, Australia}, booktitle = {Proceedings of the 9th International Symposium on Fibre Reinforced Polymers in Reinforced Concrete Structures (FRPRCS-9), 13.07. - 15.07.2009, Sydney, Australia}, editor = {Oehlers, Deric John and Griffith, Michael C. and Seracino, R.}, publisher = {[Univ ersity of Adelaide]}, address = {[Adelaide]}, isbn = {978-0-9806755-0-4}, language = {en} } @inproceedings{FinckhZilchEllinger, author = {Finckh, Wolfgang and Zilch, Konrad and Ellinger, Mathias}, title = {Evaluating the bond stress relationship of externally bonded CFRP-strips at the intermediate crack element}, series = {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}, booktitle = {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}, editor = {Motavalli, Masoud}, edition = {1 CD-ROM}, publisher = {EMPA}, address = {[D{\"u}bendorf]}, isbn = {978-3-905594-58-4}, pages = {1 -- 9}, abstract = {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.}, language = {en} } @inproceedings{FinckhZilch, author = {Finckh, Wolfgang and Zilch, Konrad}, title = {Evaluation of the bond behavior at the intermediate crack element with a special test procedure}, series = {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}, booktitle = {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}, editor = {Ye, Lieping and Feng, Peng and Yue, Qingrui}, publisher = {Springer}, address = {Berlin ; Heidelberg}, isbn = {978-3-642-17486-5}, doi = {10.1007/978-3-642-17487-2_111}, pages = {517 -- 520}, abstract = {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.}, language = {en} } @inproceedings{ZilchNiedermeierFinckh, author = {Zilch, Konrad and Niedermeier, Roland and Finckh, Wolfgang}, title = {New German guideline for strengthening concrete structures with adhesive bonded reinforcement}, series = {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}, booktitle = {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}, editor = {Motavalli, Masoud}, edition = {1 CD-ROM Ill., graph. Darst. 1 Buch (212 S.)}, publisher = {EMPA}, isbn = {978-3-905594-58-4}, language = {en} }