In connection with the characteristic in forces and the construction technique of bridges,the calculation shemes of structure in different stages and the equivalent section formulas of arch rib for flying swallow type of concrete-filled steel tubular arch bridge are proposed.

According to the equivalent load law,the spatial pre-stress is equal to the vertical and the radial direction load.

In general cases, the formula for calculating the equivalent load of prestressing force in curved girder is rather complicated and inconvenient to use.

Because the loss of prestressing force caused by friction resistance in curved girder will increase with the increasing of the curvature of curved girder, the calculation for equivalent load of prestressing force must add the effect of friction resistance.

Replica locating mechanism in grid based on peer agent;

A replica locating method based on Small-world Theory and peer agent was proposed in allusion to current replica locating method in Data Grid environment and P2P data location method.

Application of equal load of soil layer methods in design of retaining wall;