From concrete material,embedded of pipeline,temperature,displacement of native reinforcing,corrosion of reinforcing steel and other aspects reasons caused the cracks in concrete structure are analyzed,at the same time corresponding prevention and treatment methods are proposed in order to reduce the production of cracks.

Using construction general plan drawing,be aimed at the mistakes easy to make by the students in practical teaching,combine with an example,give minute description about how to calculate the fulcrum negative steel of the multiple floor frame beam.

General solution method of rectangular plate bending with two opposite ends supported under boundary displacements;

Using the united method in this paper,bending solution of rectangular plates with various supported conditions is solved when the plate is subjected to boundary displacements.

Combined with the construction of the Magong Bridge in Changzhou City, the prestress technique by means of the support displacement method to avoid cracks in floor deck concrete caused by tensile stress is studied.

The influence of support displacement on the load\|carrying capacity of arched corrugated metal roof(ACMR) is evaluated through global stability analysis of this kind of roof structure working together with its supporting structure.

This paper first presents the method for calculating the displacement of movable supports and the expansion amount at the tip of the girder due to th.

Secondly,three calculation methods for numerical simulation analysis of removing temporary supports which are support displacement method,equivalent rod bottom-end displacement method and jack element method were introduced.