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<p>In this study, the concept of an efficient bridge management system focused on monitoring bridge displacements, was proposed for maintaining numerous bridges of municipal government in Japan. In order to monitor displacement easily, a displacement estimation method using measured acceleration data was proposed. The applicability of the proposed method, then, was verified through the field measurement using the prepared and weighed loading truck. The management system was proposed, and its application scenario using the developed system and measurement device, was also introduced for further actual operations in municipal government districts.</p>

The paperless design is becoming popular in the manufacture with the advance of computer technology. However, the design based on the freehand drawing and the beam theory is still common in the bridge design field. This paper proposes the method of designing the steel truss structure with the help of the optimization technique and the finite element method. The grid computing technology and the replacement with a Bezier curve are adopted in this approach for the further improvement in the computing speed.

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