| |
|
|
|
MERLIN-BDGM
Bridge Geometry
The purpose of BDGM is to solve the geometrics that are required in the design, detailing, and construction of highway bridges and, thereby, the engineering of this time consuming task. In addition, the program removes the geometric limitations in the design of bridge structures.
The program solves the geometrics by intersecting a series of longitudinal lines that run basically parallel to the bridge with a series of transverse lines that lie basically across the bridge. The computed area (including the finished grade elevation) at each intersection point is reported as the output data. The longitudinal lines may be composed of beams, gutters, curbs, railings, etc., whereas the transverse lines can be bents, centerline bearings, diaphragms, construction joints, splice poiints, etc. The input data is entered on forms provided for the engineer. |
|
| |
| The bridge is oriented on a user-defined coordinate system of X and Y axes. The longitudinal and transverse lines are set up in equation form and intersected by computing the solutions of simultaneous equations. The data given in the output at the intersection points of the longitudinal and transverse lines are computed using the basic concepts of analytical geometry.
The bridge may be located in one, two, or three combinationns of horizontal curves and tangents. The horizontal curves may be compound but not reverse curves (work as two problems). The survey line cannot be a spiral for the purpose of computing stations. Vertical alignment is limited to two vertical curves with corresponding tangents. The surface of the bridge may be level, superelevated (with one to six lanes in constant or transition superelevation), or parabolic. The maximum number of longitudinal lines is thirty, and the maximum number of T-lines is twenty per span with no limitation on the number of spans.
The program has been upgraded to run under the WINDOWS, WINDOWS/NT or DOS environments. Single user or Network versions are available.
|
|
| |
|
|
|
