Related Experiment Video
Updated: Jan 20, 2026

Measuring the Strength of Mice
Published on: June 2, 2013
Strength without Size Effect and Formula of Strength for Concrete and Natural Marble
Guangchun Zhou1,2, Jun Shi3, Maohong Yu4
1Key Lab of Structures Dynamic Behavior and Control of China Ministry of Education, School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China. gzhou@hit.edu.cn.
Abstract:
Throughout the several-hundred-year-long history of the concept of strength, inaccurate material strength as a result of the size effect and the inconsistency of strength theories have been two continuous and challenging issues, and have even been taken to be inherent attributes of material strength. Applying the structural stressing state theory and method, this study experimentally investigates the uniaxial load-bearing process of concrete specimens and reveals their stressing state mutation features at specific load levels. Exploration of this general feature resulted in the discovery of essential strength, which is basically without size effect. Then, biaxial and triaxial experiments with concrete specimens were conducted in order to obtain the results for various combinations of principal stresses on essential strength. Consequently, according to Yu's unified strength theory, the formula for strength of concrete was determined by fitting the relation between the combined principal stresses and the essential strength, which was verified by experiments carried out using natural marble specimens. Essential strength could promote the accuracy of strength indices, and the formula for strength might replace the existing strength theories for brittle materials. The initial solution of these two classic issues could make a new contribution to Yu's unified strength theory and its final goal, promoting related research on material strength and leading to a more rational use of material strength in practical engineering.
More Related Videos
Related Concept Videos
Fatigue Strength of Concrete
Relation Between Tensile Strength and Compressive Strength of Concrete
Impact Strength of Concrete
Non-destructive Tests for Concrete Strength
Tensile Strength Considerations of Concrete
The dimensions and shape of a concrete specimen...
Acid Strength and Molecular Structure
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with increasing...

