Bearing Capacity Reserves of Stone Spacer Structures

Defects and mechanisms of damage to stone vaults, arches and arched window lintels are analyzed. The shortcomings of the existing methods of their strengthening are noted. The margins of safety of cylindrical and cross vaults with cracks are discussed, as well as the positive effect of sinus filling on their bearing capacity. The results of experimental studies of full-scale samples of passage and decorative stone arches are presented. The unloading effect of the masonry sections located above them was established. It was revealed that as a result of the redistribution of forces between the arches and the areas of masonry mating with them, the mechanism of destruction and a significant increase in the bearing capacity of the arches occur. A similar effect has been established for stone lintels of various curvilinear outlines. The effect of their joint work with the layers of masonry located above them increases with an increase in the curvature of the lintels, as well as the thickness of the masonry located above them. The identified reserves of the bearing capacity of stone spacer structures in many cases make it possible to avoid their costly repair and strengthening.

R.B. ORLOVICH¹, Doctor of Sciences (Engineering), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.);
S.S. ZIMIN², Candidate of Sciences (Engineering), Associate Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ «Georeconstruction» PI (4, Izmaylovskiy Avenue, Saint Petersburg, 190005, Russian Federation)
² Peter the Great St. Petersburg Polytechnic University (29, Politekhnicheskaya Street, Saint-Petersburg, 195251, Russian Federation)

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