TY - JOUR A1 - Schermer, Detleff T1 - The simplified calculation method of DIN EN 1996-3 in practice JF - Mauerwerk N2 - The design and detailing of masonry buildings was usually undertaken in the past using the simplified procedure in Section 6 of DIN 1053-1 (1996-11). With the changeover to the new European code, a new procedure has been made available with the simplified calculation method of DIN EN 1996-3, which promises similarly simple and safe handling for the user. The practical implementation of this new code has been underway for some time. The article investigates the standard design cases and explains the innovations and alterations compared to DIN 1053-1. T2 - Das vereinfachte Bemessungsverfahren von DIN EN 1996-3 in der Praxis Y1 - 2015 U6 - https://doi.org/10.1002/dama.201500682 VL - 19 IS - 6 SP - 471 EP - 478 PB - Wiley ER - TY - JOUR A1 - Schermer, Detleff T1 - Hybrid testing of masonry structures subjected to seismic loading JF - Mauerwerk N2 - The combination of experiments and numeric description in a test makes it possible to realistically investigate almost any type of system subjected to dynamic loading without requiring the extremely expensive device of a shaking table. With the numeric approach it is possible to examine the behaviour of even very large and complex structures, thus reducing the experimental investigations to the essential part of the system – for example, bracing masonry walls. This test method has proved to be very helpful, particularly for the investigation of seismic loading, and it allows the synchronous examination of several force and displacement variables (horizontal, vertical, rotational). A new laboratory is presented for the investigation of full-scale building structures up to three storeys high. Die Kombination von Experiment und numerischer Beschreibung innerhalb eines Versuches erlaubt die realitätsnahe Untersuchung annähernd beliebiger Systeme unter dynamischen Beanspruchungen, ohne den extrem hohen Aufwand von Rütteltischen zu erfordern. Durch die Numerik können auch sehr große und komplexe Strukturen mit ihrem Verhalten erfasst werden, wobei sich die versuchsmäßige Untersuchung auf den maßgebenden Teil des Systems – beispielsweise aussteifende Mauerwerkswände – beschränken kann. Insbesondere für Erdbebenbeanspruchung hat sich die Versuchsmethode sehr gut bewährt und es können mehrere Kraft- und Verschiebungsgrößen (horizontal, vertikal, Rotation) synchron behandelt werden. Für die Untersuchung an vollmaßstäblichen Gebäudestrukturen bis zu drei Geschossen wird ein neues Labor vorgestellt. T2 - Hybride Versuche an Mauerwerkskonstruktionen unter Erdbebenbeanspruchung Y1 - 2014 U6 - https://doi.org/10.1002/dama.201400625 SN - 1437-1022 SN - 1432-3427 VL - 18 IS - 3-4 SP - 206 EP - 212 PB - Ernst ; WILEY CY - Berlin ; Weinheim ER - TY - GEN A1 - Schermer, Detleff ED - Schermer, Detleff ED - Brehm, Eric T1 - Mauerwerk-Kalender 2023 BT - Schwerpunkte: Instandsetzung; Erdbeben; Lehmbau Y1 - 2023 SN - 978-3-433-03374-6 PB - Ernst & Sohn GmbH CY - Berlin ET - 48. Jahrgang ER - TY - GEN A1 - Schermer, Detleff T1 - Test set-up and proposed testing procedure for the determination of masonry walls under in-plane shear loadings : Brick and Block Masonry: Trends, Innovations and Challenges T2 - Proceedings of the 16th International Brick and Block Masonry Conference (IMAC), Padova, Italy, 26-30 June 2016 Y1 - 2016 SP - 1883 EP - 1888 PB - Routledge ER - TY - JOUR A1 - Schermer, Detleff A1 - Meyer, Udo Joachim A1 - Lutman, Marjana A1 - Triller, Petra T1 - Shear tests on full scale storey-height specimens constructed with thermally insulating clay unit masonry with thin-layer mortar JF - Mauerwerk N2 - The paper presents results of a series of 6 in-plane shear tests on storey-height clay unit masonry panels [1] with thin-layer mortar, carried out in addition to previous test campaigns [2], [3], and [4]. The walls were constructed with unfilled thermally insulating clay units with a thermal conductivity of lambda = 0.09 W/(m . K). The current design rules for clay unit masonry according to DIN EN 1996-1-1/NA [5] are conservative compared to the presented test results for thermally insulating clay unit masonry. KW - clay units KW - design KW - in-plane shear KW - test methods KW - thin-layer mortar KW - WALLS Y1 - 2019 U6 - https://doi.org/10.1002/dama.201900025 SN - 1432-3427 VL - 23 IS - 6 SP - 378 EP - 386 PB - Ernst & Sohn ER - TY - JOUR A1 - Schermer, Detleff A1 - Schmalz, Jonathan A1 - Meyer, Udo Joachim A1 - Gams, Matija A1 - Lutman, Marjana A1 - Triller, Petra T1 - Shear tests on thermal insulating clay unit masonry walls with thin layer mortar JF - Mauerwerk N2 - The paper presents the results of 20 shear tests on full scale thermal insulating clay unit masonry walls. The types of units used (units with large chambers filled with mineral wool pads and units with small corings filled with mineral wool granulate) as well as the tested wall geometries and vertical loads are representative of the most common wall constructions currently used in housing in Germany. The aim of the investigations was the verification of the shear -resistance of thermal insulating clay unit masonry under realistic conditions and comparison with the design rules in the codes and national technical approvals. The current design rules for clay unit masonry in DIN EN 1996-1-1/NA are rather conservative compared to the test results for thermal insulating units. KW - design KW - experimental testing KW - high precision clay masonry units KW - masonry with thin layer mortar KW - shear KW - thin layer mortar Y1 - 2018 U6 - https://doi.org/10.1002/dama.201800028 VL - 22 IS - 6 SP - 385 EP - 398 PB - Ernst & Sohn, a Wiley brand ER - TY - CHAP A1 - Schermer, Detleff ED - Zilch, Konrad T1 - Bemessung von Mauerwerk T2 - Konstruktiver Ingenieurbau und Hochbau: Technik, Organisation, Wirtschaftlichkeit. N2 - Die Bemessung von Mauerwerk deckt neben der Tragfähigkeit auch den Nachweis der Gebrauchstauglichkeit ab. Im Beitrag werden die Grundanforderungen und Hintergründe der Bemessung von Mauerwerk dargelegt und die Lösungen nach den aktuellen Vorschriften von Eurocode 6 und dem Nationalen Anhang erläutert. Y1 - 2024 SN - 978-3-658-29498-4 U6 - https://doi.org/10.1007/978-3-658-29498-4_66 SP - 443 EP - 473 PB - Springer Fachmedien CY - Wiesbaden ER - TY - GEN A1 - Meißner, Jonathan A1 - Schermer, Detleff A1 - Amberger, Franziska A1 - Hofmann, Philipp ED - Milani, Gabriele ED - Ghiassi, Bahman T1 - Eccentric partial compression tests on wall test specimens T2 - 18th International Brick and Block Masonry Conference : Proceedings of IB2MaC 2024 Volume 2, 21.-24. July 2024, Birmingham N2 - Within the scope of this work, the objective was to transfer the stress situations resulting at the exterior wall-floor joint as partial area loads to wall test specimens. The actual load-bearing capacities of highly thermally insulating plane clay unit masonry are to be quantified and compared with the calculated load-bearing capacities based on the unconfined stress-strain relationship and the linear-elastic, quasi-ductile and rigid-plastic material behaviour. In order to record also the deformations and compression at cross-section level directly in the load application area as well as the curvatures at system level, the deformations of all test specimens are documented by means of optical deformation measurement (digital image correlation). In this way, not only the load-bearing capacity but also, in particular, the stress resp. Strain distribution and stress redistributions as well as the experimental moment-curvature relationship can be quantified for the further analytical considerations and evaluations. Accordingly, it can be determined for all eccentric partial area loads that, regardless of the loading situation, higher load bearing capacities are achieved both compared to the calculated bearing capacity and based on a rigid-plastic material behaviour. Especially in the case of the loading situation at the bottom of the walls with partially supported floors, the activation of the unloaded cross-sectional zone at the load transfer can be shown very well based on the photogrammetrically determined cross-sectional compression. The decoupling initiated by the local discontinuity of the stress-strain state occurs only after the rigid-plastic cross-sectional bearing capacity is reached. Y1 - 2025 SN - 978-3-031-73309-3 U6 - https://doi.org/10.1007/978-3-031-73310-9_16 VL - 2025 SP - 223 EP - 238 PB - Springer ER - TY - CHAP A1 - Hofmann, Philipp A1 - Schermer, Detleff A1 - Amberger, Franziska A1 - Meißner, Jonathan ED - Ghiassi, Bahman ED - Milani, Gabriele T1 - Experimental investigation at the exterior wall-floor joint with partially supported slabs T2 - 18th International Brick and Block Masonry Conference : Proceedings of IB2MaC 2024 Volume 2, 21.-24. July 2024, Birmingham N2 - The objective of the extensive experimental investigations at the exterior wall-floor joint on a scale of 1:1 on highly thermally insulating clay unit masonry was to record the interaction between the acting axial force and the resulting slab rotation as a result of defined slab fixed end moments. The focus of this test series was on the influence of the nonlinear system behaviour at different axial force-moment combinations caused by the gaping of the horizontal joints as well as the contact zone between slab and masonry. With knowledge of the moment-rotation interaction as a function of the axial force of the wall, a numerical model can be developed with regard to the nonlinear system behaviour. Since the angle of rotation of the slab is of major importance in this respect, the structural design of a reinforced concrete slab is dispensed with in the test and replaced by a flexurally rigid solid steel bracket. This has the decisive advantage that the rotation of the steel bracket can be precisely detected by means of optical deformation measurement (digital image correlation) and directly assigned to the existing axial force-moment combinations. The evaluation of the tests has shown that the dominant nonlinear effect is essentially due to the gaping of the horizontal joints in the exterior wall-floor joint. During the test execution, the proportionality limit between the bracket moment and the bracket rotation could be successively increased with increasing load level regardless of the previous nonlinear system behaviour. Y1 - 2025 SN - 978-3-031-73309-3 U6 - https://doi.org/10.1007/978-3-031-73310-9_18 SP - 254 EP - 265 PB - Springer CY - Cham ER - TY - CHAP A1 - Meißner, Jonathan A1 - Schermer, Detleff A1 - Amberger, Franziska A1 - Hofmann, Philipp ED - Milani, Gabriele ED - Ghiassi, Bahman T1 - Experimental investigations on the influence of eccentric load application on the load bearing capacity of clay unit masonry walls T2 - 18th International Brick and Block Masonry Conference : Proceedings of IB2MaC 2024 Volume 2, 21.-24. July 2024, Birmingham N2 - For the analysis of centric and double-eccentric wall compression tests, a comprehensive database of different highly thermally insulating clay unit types is being compiled for the first time. The objective of the analysis is, on the one hand, to characterise the load-deformation behaviour of highly thermally insulating clay unit masonry and, on the other hand, to analyse the resulting stress distribution at the cross-section level. In addition, the influence of the increasing load inclination angle with decreasing test specimen slenderness is also shown. With regard to the wall compression tests under double-eccentric loading, the effects caused by the load inclination become obvious and lead to an average reduction of the load-bearing capacity of 41% compared to the centric compression tests. Furthermore, an opposite effect can also be observed with regard to the generally known interaction between decreasing specimen slenderness and increasing load-bearing capacity. According to this, lower load-bearing capacities result with constant eccentricity and decreasing slenderness, so that a back calculation to a uniform slenderness ratio with the relevant normalisation functions is not possible. The reason for this is due to the linearly increasing load inclination angle and the resulting increasing shear stress within the transverse webs. Y1 - 2025 SN - 978-3-031-73309-3 U6 - https://doi.org/10.1007/978-3-031-73310-9_17 SP - 239 EP - 253 PB - Springer CY - Cham ER - TY - CHAP A1 - Schermer, Detleff A1 - Meißner, Jonathan A1 - Amberger, Franziska A1 - Hofmann, Philipp ED - Ghiassi, Bahman ED - Milani, Gabriele T1 - Numerical investigation for nonlinear internal forces at the exterior wall-floor joints T2 - 18th International Brick and Block Masonry Conference : Proceedings of IB2MaC 2024 Volume 2, 21.-24. July 2024, Birmingham N2 - The objective of the presented work is the analysis of the numerically determined nodal moments at the exterior wall-floor joint compared to the linear-elastic calculation of a frame section according to Annex C of Eurocode 6, Part 1–1 (EN 1996-1-1). The focus of the comparative analysis is the influence of the structural nonlinearity of the exterior wall-floor joint as well as the acting wall axial force, which are explicitly captured in the FE model in contrast to the linear-elastic frame section. In particular, the contact zone is of special importance for partially supported floor and the associated discontinuous stress distribution between the exterior wall and slab. The reason for this is the fact that the transition zone between the masonry wall and the slab behaves in a highly nonlinear manner due to the lack of tensile strength. The related eccentricity e/a required for the ultimate limit state design is thus significantly influenced by the interaction of the axial force and the resulting joint rotations. Y1 - 2025 SN - 978-3-031-73310-9 U6 - https://doi.org/10.1007/978-3-031-73310-9_19 SP - 266 EP - 279 PB - Springer CY - Cham ER - TY - CHAP A1 - Schermer, Detleff ED - Albert, Andrej T1 - Kapitel 7A: Mauerwerksbau T2 - Schneider Bautabellen für Ingenieure : mit Berechnungshinweisen und Beispielen Y1 - 2024 SN - 978-3-8462-1479-4 PB - Reguvis CY - Köln ET - 26. aktualisierte Auflage ER - TY - CHAP A1 - Hofmann, Philipp A1 - Schermer, Detleff A1 - Amberger, Franziska A1 - Meißner, Jonathan ED - Ghiassi, Bahman ED - Milani, Gabriele T1 - Substitute test method for the local load bearing capacity of masonry with partially supported slabs T2 - 18th International Brick and Block Masonry Conference : Proceedings of IB2MaC 2024 Volume 2, 21.-24. July 2024, Birmingham N2 - With increasing thermal insulation requirements and resource-efficient construction methods, demands on building exterior walls are rising. Monolithic exterior walls, devoid of additional insulation, require meticulous planning and execution of the exterior wall-floor joint. Besides addressing building physics, fire safety, and sustainable construction, this detail must meet structural analysis standards. The joint’s load-bearing capacity hinges on both the masonry wall and slab loads. Masonry walls primarily bear loads from slabs and roof structures. However, slab loads induce rotation, adding bending stress to the masonry. Bending transmission depends on structural design, material parameters, and axial force, creating parameter interactions. To scrutinize various products and design variants regarding contact stiffness, load distribution, and stress concentrations, the Laboratory for Structural Engineering at the University of Applied Sciences (OTH) in Regensburg, Germany developed specific testing methods. These methods realistically capture load redistribution effects based on perforation patterns and quantify potential loadbearing reserves. Additionally, optimising design regulations based on results can accurately describe masonry’s load-deformation behaviour. Y1 - 2025 SN - 978-3-031-73310-9 U6 - https://doi.org/10.1007/978-3-031-73310-9_21 SP - 294 EP - 307 PB - Springer CY - Cham ER -