Method for testing a wall structure shearing strength in situ in the existing buildings

摘要

The in situ test of wall resistance to cutting in existing buildings, using a hydraulic fitter, is characterised by the removal of the support coil in the wall above one of the wall elements (1) by creating a gap (2),where t w o steel inserts (3) are placed with a distance t equal to the width of the wall element (1),and below the centre part of the wall element (1), the wall shall have a depth (4) of length and depth t corresponding t o the width of the wall element (1),where a steel load plate (5) of length and width t is positioned so that the edge of the steel load plate (5) and the edge of the steel inserts (3) are located in t w o vertical planes (6) of t-range, with a hydraulic motor (7) under the steel load plate (5),determine the maximum value of the force Pn followed by a drop in the pressure on the hydraulic motor (7) and determine the strength of the wall a t the cut-off perpendicular to the support coils according to the formula: fvvk=pn/2ht where: h -height of the wall element 1, t-width of the wall element (1),and Pn is the maximum P force with which the decrease occurs.