Strain measurement in dams buttresses or bridges - uses strain gauges in rectangular hollows at various location in the structure

摘要

The strain measuring system for structural engineering applications on dam buttress or bridge retaining walls uses a number of hollows (D) of rectangular cross section at selected points in the wall (T). The strain gauges are connected to a common central measuring site (Z). The gauges enable seven deformation strains to be measured in directions parallel to the sides an diagonals of the fundamental cube. The principal strains may be calculated by the Mohr stress diagram technique with the surface under investigation forming an ellipsoid of revolution.