Three-dimensional simulation calculation of skew box girder and static load test;

Using CB shell element and layered model,the behaviors of cracking,yielding and destroying procedures of a three-span PC continuous skew box girder are analyzed considering the material and the geometry nonlinearity.

Based on shell63 element of ANSYS,skew box girders with thirty degrees and fortyfive degrees of skew are analyzed respectively to investigate longitudinal and transversal distributions of shear lag effect under concentrated or uniform force,and they are compared with the corresponding right box girders.

Differences between the results of test and the 3D FEM analysis with two cases of orthogonality and skew were discussed, and the dynamic properties of skew box girders bridge were explored.

We discuss the difference between the results of test and 3D FEM analysis with two cases of orthogonality and shew,and explore the dynamic properties of skew box girders.

Using advanced technologies of computer networks and communications, MNTCSB implements automatic management of telecommunication cable switching box.

The paper will deal with the designing of the supervisory computer control of switching box, the principle of the system hardwares and the designing process of the system softwares.