Development of quality control methods for measurements and testing concrete structures

Abstract

The development of building materials, structures, calculation and design methods, technologies leads to a significant lag in quality control methods, in particular, concrete. Modern control methods cannot guarantee the level of reliability of buildings and structures under construction. The standards for designing and controlling the compressive strength class of concrete, which are controlled according to various schemes, cannot meet the requirements for reliability during construction and operation. Goal. Give recommendations on the use of various concrete classes to ensure the required level of reliability and reliability of critical structures. Methods and materials. Standard concrete samples of classes B 30,50,100 in the form of 150 mm cubes were used as materials. Methods for estimating random variables for the load-bearing capacity and the load effect on the structure are used. Results. Different classes of concrete in terms of compressive strength provide different safety margins. With an increase in the concrete class, the safety factor increases, which ensures more efficient use of high-strength concretes in construction practice in terms of reliability. The probability of failure increases as the concrete class increases, which is due to different safety factors as the class increases. Practical significance. The development of control methods contributes to the level of development of engineering and technology of design and construction. The conducted research will improve the accuracy and quality of measurements and tests in the control of building materials and structures, even when using destructive methods.