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Abstract The microbial-induced carbonate precipitation (MICP) technique has been increasingly employed for erosion mitigation and stabilization of sandy slopes. Biocementation can improve the strength and stiffness of unsaturated sand. In this study, the performance of a new biogrouting method (i.e., surface percolation) for sandy slopes under unsaturated conditions was investigated. Model-scale laboratory tests were conducted on…

Abstract In this paper, the stress-strain response of two extrusive volcanic igneous rocks, e.g., compact basalt (CB) and volcanic breccia (VB), under a high rate of loading is studied experimentally and numerically. The dynamic characterization of rocks is done for five different specimen sizes using a split Hopkinson pressure bar (SHPB) device with a 76–mm diameter….

The potential for service robotics is growing fast: in hospitality, medical care, agriculture and logistics, lightweight robots help to automate monotonous tasks. To show that using service robots can be easy and low cost, igus will present a modular, configurable gearbox kit for robotics at the Hannover Trade Show from 12-16 April. The kit features…

Abstract Probability distribution models (PDMs) of variables are cornerstones in the performance-based earthquake engineering framework. For liquefiable ground in earthquake-prone regions, the liquefiable layer often is sandwiched between nonliquefiable layers. However, PDMs for thicknesses of these soil layers, particularly the nonliquefiable crust and the liquefiable layer, are not yet well established. To fill this gap,…

Abstract This paper presents an experimental investigation on the application of textile-reinforced mortar (TRM) layers as a means of increasing the flexural capacity of two-way reinforced concrete (RC) slabs with cut openings. The investigated parameters included the number of TRM layers (one versus two layers), the textile type (two carbon fiber textiles with different weight…

Senior Geotechnical Engineer, Fugro GeoConsulting, 58 Mounts Bay Rd., Perth, WA 6000, Australia; formerly, Research Associate, Centre for Offshore Foundation Systems, Oceans Graduate School, Univ. of Western Australia, Perth, WA 6009, Australia. Email: [email protected] Source link

Abstract P-wave velocity ( Vp ) is a significant parameter in characterizing the physical and mechanical properties of rock. The Vp of rock under different stress conditions will vary greatly. This study investigated the transformation of Vp under a single load and unload condition. Six concrete specimens were used. The unload level was 0 (uniaxial…

Abstract In this study, in-plane shear tests were performed on 20 masonry wall specimens. The research factors considered included the length, height, thickness, fiber material, and number of textile-reinforced concrete (TRC) layers of the specimens. The failure modes, shear strength, pseudoductility, and energy dissipation of masonry walls under the influence of different factors studied were…

Day Four of the British Engineering Excellence Awards has seen new winners announced. They are: Start-Up of the Year: Archangel Lightworks Young Design Engineer of the Year: Mohammed Tahir of PRFI Archangel Lightworks is a specialist in the design, manufacture, repair and calibration of load cells and load monitoring equipment. The judges called it: “Boldly…