Based on the collapse theory and a 3D numerical simulation model,the ultimate bearing capacity of reinforced concrete arch ribs was calculated to accurately determine the ultimate bearing capacity of a long-span reinforced concrete arch bridge.

The formation of a plastic hinge at its cross section is considered as the limit state of strength of the member; and the stable load bearing capacity of the member is determined by means of the collapse theory.

On the basis of axially compressed short column experiments, this paper analyzes the M-N- relationship for concrete filled square steel tubular columns through numerical computation and simplified approach , By use of the collapse theory, a simplified analytic method for computing the ultimate strength of concrete filled square steel tubular columns under eccentric compression has been suggested .

Based on the blown-up theory and the V-3θ structural prediction method,V-3θ figures of 36 aerological stations in Northwest China were made.

A unique mathematical model was established on the transition line from stratified flow to slug flow according to the Stokes breaking dam theory.

Accurate Simulation on Collapse History of Thin-walled Beam with Closed-hat Section;

The destroyed process of this rigid resistance structure is from buckling to collapse.

Considering the requirements of riser strength,system collapse,propagated buckling and limitation of floating,the smallest thickness that meets the requirements is determined.

By analyzing the ozone cell electrical characteristic,theoritic resistance to voltage,and the ingredients which affect the character of ozone cell,it can be concluded from the result of the experiment and academic analysis that one tubular ozone cell of glass dielectrics will produce ozone more than 100 g / h in expect if only we choose optimized configuration parameter and work condition.