Dataset of cracks on DIC images
This dataset contains crack images and corresponding annotated ground truth masks. This data was used to train, validate, and test a deep convolutional neural network to detect crack pixels on images taken as input for the digital image correlation (DIC) method.
Please cite as: Rezaie, A., Achanta, R., Godio, M., & Beyer, K. (2020). Comparison of crack segmentation using digital image correlation measurements and deep learning. Construction and Building Materials, 261, 120474.
Seismic Performance of Slender RC U-shaped Walls with a Single-Layer of Reinforcement
This dataset contains the experimental data for two large-scale reinforced concrete U-shaped wall specimens tested at the Earthquake Engineering and Structural Dynamics Laboratory (EESD Lab), École Polytechnique Féderale de Lausanne (EPFL) in Switzerland. This dataset contains supplementary material for the journal paper titled, “Seismic Performance of Slender RC U-shaped Walls with a Single-Layer of Reinforcement”, which contains some of the experimental observations and results. Thus, this dataset also contains MATLAB files associated with calculating the results presented in the journal paper and the corresponding figures and plots.
Please cite as: Hoult, R., Appelle, A., Almeida, J., & Beyer, K. (2020). Seismic performance of slender RC U-shaped walls with a single-layer of reinforcement. Engineering Structures, 225. doi:10.1016/j.engstruct.2020.111257
Quasi-static shear-compression tests on stone masonry walls with plaster: Influence of load history and axial load ratio
This dataset contains the results of six quasi-static cyclic shear-compression tests performed on single-leaf stone masonry walls made of limestone blocks and lime-based mortar joints. Of the six walls, four are tested under different axial load ratios, performing a cyclic load history with two cycles per increasing drift demand. Three are tested under the same axial load ratio but are subjected to different load histories, namely, one monotonic loading, one cyclic loading with two cycles per drift level and one cyclic loading with one hundred cycles per drift level.
Please cite as: Godio M, Vanin F, Zhang S, Beyer K (2019). “Quasi-Static Shear-Compression Tests on Stone Masonry Walls with Plaster: Influence of Load History and Axial Load Ratio.” Engineering Structures 192: 264–78.
Uni-axial tension-compression tests on thin RC boundary elements
Thin reinforced concrete walls, which are reinforced with only a single layer of vertical reinforcement, are particularly susceptible to out-of-plane failure. In order to investigate the response of the corresponding wall boundary elements, twelve reinforced concrete members with a single layer of vertical rebars were tested under tension–compression cycles.
Please cite as: Rosso A, Jimenez-Roa LA, Pacheco de Almeida J, Guerrero Zuniga AP, Blandon CA, Bonett RL, Beyer K (2017). Cyclic tensile-compressive tests on thin concrete boundary elements with a single layer of reinforcement prone to out-of-plane instability, Bulletin of Earthquake Engineering, https://doi.org/10.1007/s10518-017-0228-1
U-shaped walls under diagonal loading
Core walls are often used to provide horizontal stiffness and strength to mid- or high-rise buildings. The design practice is, however, largely based on findings from tests and analysis of rectangular walls subjected to uni-directional loading. Two quasi-static cyclic tests on U-shaped walls were conducted in which the walls were loaded in the diagonal direction. These tests highlight that the diagonal loading direction is critical for the following reasons: (1) The strain gradient across the wall width promotes out-of-plane buckling of the boundary elements in the flange ends; (2) Plane section analysis does not yield reliable moment capacity estimates for the diagonal loading direction and (3) under diagonal loading the compression depth in the flange end boundary elements is larger than for the other loading directions, exposing unconfined concrete to large compressive strains. The test data comprises conventional and optical measurement data as well as results of material tests.
Please cite as: Constantin R, Beyer K (2016) Behaviour of U-shaped RC walls under quasi-static cyclic diagonal loading, Engineering Structures 106: 36-52
Uni- and bi-directional tests on five thin T-shaped RC walls
The test series investigates the influence of the wall thickness on member stability, the role of lap splices on damage distribution and displacement ductility, and the effects of simultaneous out-of-plane loading on the member response. The tests are unique with respect to the following aspects: TW1 and TW4 are the first tests on RC walls that developed large out-of-plane displacements along the wall height for which the entire 3D displacement field was measured. TW3 is the wall test with the largest lap splice length to shear span ratio documented in the literature and therefore the influence of the moment gradient on lap splice performance. Wall TW5 is geometrically and mechanically similar to unit TW2, but was loaded under bi-directional loading (with a larger shear span ratio). Test units TW4 and TW5 are one of the first bi-directional wall tests on nearly rectangular walls and allow therefore to make an initial assessment of the impact of bi-directional loading on wall performance.
Please cite as: Almeida J, Prodan O, Rosso A, Beyer K (2016) Tests on thin reinforced concrete walls subjected to in-plane and out-of-plane cyclic loading. Earthquake Spectra. Published online
Quasi-static cyclic tests of 6 URM walls
The URM walls were constructed using hollow core clay bricks and normal cement mortar. The main parameters investigated were (i) the shear span and (ii) the axial load ratio. Next to the global response parameters (applied forces, top displacement), also the displacement field was continuously measured by means of 4 LEDs per brick.
Please cite as: Petry S, Beyer K. (2014) Cyclic test data of six unreinforced masonry piers with different boundary conditions, Earthquake Spectra, published online.
Shake table test of a 4-storey building with RC and URM walls
The test unit was constructed at half-scale and subjected to uni-directional shaking up to near collapse. The structure consisted of hollow core clay brick masonry walls and spandrels, reinforced concrete slabs and walls. It was instrumented using conventional and optical measurement techniques. The latter were used to record the displacement field of one of the URM walls.
Please cite as: Beyer K, Tondelli M, Petry S, Peloso S. (2014) Dynamic testing of a four-storey building with reinforced concrete and unreinforced masonry walls: Prediction, test results and data set, Bulletin of Earthquake Engineering, published online.
Quasi-static cyclic tests of 5 half-scale URM walls
Scaling hollow core clay brick masonry poses several challenges and attempts in the past have shown that it is often difficult to achieve good matched with full-scale tests with regard to stiffness, strength and displacement capacity. As preparation for the shake table test, a half-scale brick was developed and five of the six full-scale tests on URM walls repeated (first data set). The experimental results show a good match between full-scale and half-scale masonry.
Please cite as: Petry S, Beyer K. (2014) Scaling unreinforced masonry for reduced-scale testing, Bulletin of Earthquake Engineering, 12(6): 2557-2581.
Quasi-static cyclic tests of 2 systems with one RC and one URM wall each
The test units were constructed at 2/3 scale and subjected to quasi-static cyclic in-plane loading. The test units consisted each of one RC and one URM wall, which were connected by two RC beams. The test units represent the lower two storeys of a four storey reference structure. Their behaviour was recorded using conventional and optical measurement techniques.
Please cite as: Paparo A, Beyer K. (2014) Quasi-static cyclic tests of two mixed reinforced concrete– unreinforced masonry wall structures, Engineering Structures 71:201-211.
Data sets from research activities at ETH Zurich
Quasi-static cyclic tests of two U-shaped reinforced concrete walls
Tests from Katrin Beyer’s PhD thesis (Supervisors: A Dazio, MJN Priestley)
Please cite as: Beyer, K., Dazio, A. and Priestley, M.J.N. (2008) “Quasi-static cyclic tests of two U-shaped reinforced concrete walls,” Journal of Earthquake Engineering 12(7): 1023-1053.