Based on deeply analyzing the closure effect and stress dispersion of crust,a critical edge pressure formula of soft clay foundation considering the two effects is derived.

Based on the elastic-plastic theory, the critical edge pressure and critical loading of subsoil have been analyzed and stUdied with realistic coefficient of earth pressure at rest (K0≠ 1 )in this paper.

Formula of critical edge load of strip foundation under complex stress state;

The calculation method of the critical edge load and the critical load of composite foundations reinforced by stone columns is provided by the application of Mohr-Coulomb\'s failure criterion to soil between stone columns.

Based on Lade-Duncan failure criterion,calculating methods of cohesion and internal frictional angle of soil mass under plane strain state are given firstly,and critical edge load,critical load and ultimate load of shallow foundations are further studied in detail by using the cohesion and internal frictional angle.

Study on critical load and elastic stability of drilling riser;

A calculating method of critical loading for dual-extension hydraulic legs of hydraulic powered supports;

Supporting-displacement-based critical load calculation for jib strings of rubber tired gantry cranes;

Analysis of critical load for lateral buckling of beam;

Lateral-torsional buckling critical load under the effect of I-type member s transverse concentrated load;

Study of critical loads of thin-walled cylinder pressure vessel with crack;

According to the thin shell plastic stability theory, based on the plastic instability coefficients and energy rule,the theoretical for calculating critical loads of plastic wrinkling on the ends of the hydroformed tube is establ.

The first three critical loads and corresponding bifurcation solutions are calculated.

The buckling critical loads are obtained with varying holes.