A finite element analysis was carried out to investigate the elastic buckling of webs in I-girders under patch load.

On the plan and application of well-shaped beam structure and the control of crack;

Several notable problems in reinforced concrete well-shaped beam design;

Taking the project of bidirectional prestress reinforced concrete well-shaped beam structure for example,support system of high and large formwork is analyzed to ensure structural safety,and structure requirements of support system are introduced.

Discussion on design of pre-stressed cross beam;

From aspects of the structure form and economic comparison, this paper probes into the practicality and economy of using the hollow block floor to replace the cross beam in the frame structure.

In this paper,we introduced the basic structural requirements in the engineering design of cross beam,elaborated some notices on the structural layout of cross beam,and proposed some effective countermeasures on the problem of temperature crack of cross beam.