Calculation of deadbolt v 1.0

The program is intended as an additional tool for checking crossbars and installing new ones. The program was implemented on the basis of standard projects Gipropromtr asstroy and the book "Designing the contact network" A.V Freifeld. The program allows you to calculate for crosses overlapping from 1 to 8 ways. For the selection of the cross-bar is compiled on the basis of the actual location of the tracks, the dimensions of the installation of the racks and the intersections. In this case, three modes are considered, two normal (ice with wind speed is half the maximum and wind of maximum intensity without ice) and emergency (wire break during ice, but in the absence of wind). Bending moments from external forces that characterize the carrying capacity of the crossbars in the emergency mode determine the normals for the lower belt of the truss (Mn np) and for normal modes calculate the design moments for the upper belt (Mp in). Corresponding bending moments from external forces are compared with permissible for medium and extreme blocks, with middle blocks being checked in the middle of the span. The end blocks are checked at a distance of 1/3 (right and left) for three-unit crossbars and 1/4 span for four-block. If the moments from external forces proved to be much less than admissible, we must either accept a light-type crossbar, or, if possible, increase the distance (span) between the cross-arms. For moments exceeding the permissible, it is necessary to take the cross-bars of a heavier type or to reduce the distance between them. In all cases, it is necessary to again determine the moments from external forces and repeat all the above checks. The conditional admissible moments in different modes for the crossbar belt wallpaper, as well as their possible design lengths, which can be obtained by decreasing the number of panels of the end blocks, are given in the program database in the window Conditionally admissible moments.
Download Rigel v 1.0
Win98 requires the VB msvbvm60.dll library

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