To apply this novel method to design of steel portal frames, the integrated nonlinear analysis, the assessment of frame systems and the practical design formats of steel portal frames with tapered members were studied.

Employing a non linear finite element analysis program, which is designed especially for the calculation of the limit temperature of the steel portal frames with the tapered members against fire, authors carries out research on the influence of a number of parameters on the limit temperature of steel portal frames subjected to fires.

The design of the foundation of portal frame structure under special foundation condition;

This paper discusses modeling method of finite element about large span portal frame structure in a certain workshop,and performs the non-linear static analysis of this structure by using ANSYS.

In China, with the fast economic development rising, portal frame structures with profiled steel sheets as maintenance system and H type steel members as main frame demostrates great market interests in the field of industrial and civil constructions.

The application of gabled frame is very widely in China.

Issues mentioned above restrict the application of gabled frame structures in high-seismic fortification intensity district in our country.

The critical conditions on eliminating fire protection cover for steel portal frames;

Research on sloped beam of steel portal frame about temperature distributing under local fire

Using the finite element analysis software ANSYS,the critical temperatures of steel portal frames in fire affected with varied factors are investigated.

In the light of that the portal strut light building structure,which has developed rapidly,possesses many quality problems,from the angles of the design and the construction,this paper probes into problems needing attention in the application of the portal strut light building structure,and puts forward some measures for solving these problems.