Slab Strips Research Articles

Intergrowth tungsten bronzes of bismuth

High resolution electron microscopic studies show that bismuth forms intergrowth tungsten bronzes containing varying widths of the WO 3 slab and one-tunnel wide HTB strips.

中空スラブのせん断性状に関する研究 (その 2) : 抵抗特性についての実験的考察

In this report characteristics on the shear resistance of void-slabs are investigated in some series of tests with regard to the slab strips parallel to the void direction. It is pointed out that the void-ratios, i.e. the hole diameter to the slab depth ratios, influence the unit shear strength and also failure mechanizms. In the case of comparatively large ratios the unit shear strength is considerably enhanced by the combined effects of the I-type section and the web reinforcement by the winding pipes. In the caseof usual middling ratios, showing shear-compression failure mode, the ultimate shear strength takes about 1.5 times as much as the values computed from empirical formula for ordinary rectangular beams. When the hole diameter becomes small, shear-tension failure appears and the strength is almost equal to that of the corresponding rectangular beams. These results are also supported by a study of the data from some previous tests by other investigators. A simple experimental formula to evaluate these effects is presented.