Seismic Test Program of Special Designed Clay Blocks Due to Earthquake Resistance by Wienerberger Consisting Real Scale Shaking Table-, Cyclic Shear-, Diagonal Tension- and Compression Tests

Abstract eng:
WIENERBERGER has invented a special shape of modern, vertical perforated fired clay blocks for load bearing unreinforced masonry URM and confined masonry, which are optimized due to earthquake excitations without neglecting the today’s requirements in thermal insulation properties hereinafter called “WIENERBERGER POROTHERM–S blocks”. Therefore a project was started to identify and proof the effectiveness of structures and wallets constructed of these WIENERBERGER POROTHERM–S blocks. This project includes the following test program: a) Real scale shaking table test A real scale structure constructed of WIENERBERGER POROTHERM–S blocks was tested due to artificial generated time histories in accordance to Eurocode 8 response spectrum and several real recorded earthquakes. b) Cyclic shear tests Cyclic shear tests have been performed with constant vertical loads and stepwise increased horizontal loads on real scale wallets. Next to the hysteresis (force-deformation plot), damping and ductility properties have been identified. c) Diagonal Tension (Compression) tests Diagonal compression tests have been done to identify the tension strength and furthermore the shear strength in order to compare these values with results of tests conducted with modern ordinary high perforated blocks. d) Compression tests on blocks and mortar To round up the parameters, compression tests on single blocks and mortar samples are performed according to actual European standards in order to evaluate the basic input parameters of the structural elements. As a conclusion of all these tests, it was verified, that structures built with POROTHERM–S blocks are of significant safety and have high energy dissipation capacity, where high behavior and response factors can be considered, if response spectra analysis method is applied.

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