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首页> 外文会议>International Structural Engineering and Construction Conference(ISEC-03); 20050920-23; Shunan(JP) >Preliminary design of prestressed concrete continuous bridges using genetic algorithms and spreadsheets
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Preliminary design of prestressed concrete continuous bridges using genetic algorithms and spreadsheets

机译：利用遗传算法和电子表格对预应力混凝土连续桥进行初步设计

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摘要

This paper presents the application of the genetic algorithm to the design of prestressed concrete, medium-span bridges, which are continuous over several spans and with uniform depth. The bridge deck is assumed to be of single-cell, box-girder type and sitting on bearings. The problem is formulated as a combinatorial optimization, that is, cross-sectional dimensions, individual span lengths, the size and number of prestressing tendons and the tendon profile are all treated as discrete design variables and the objective is to minimize the weight of the structure subject to various stress constraints. Data sets are constructed a priori for the said variables in the practical range, taking into account relevant local construction practices and designers' experience. The method is relatively simple for practicing engineers to understand and implement on spreadsheets using VBA. A numerical example is given herein for illustration; further applications will be presented in the Conference.
机译：本文介绍了遗传算法在预应力混凝土中跨桥梁设计中的应用，该桥梁跨多个跨度连续且深度均匀。假定桥面为单格，箱梁式且位于轴承上。该问题被表述为组合优化，即横截面尺寸，单个跨距长度，预应力筋的大小和数量以及筋的轮廓都被视为离散的设计变量，目的是最大程度地减少结构的重量受到各种压力限制。考虑到相关的当地建筑实践和设计者的经验，将在实际范围内为上述变量建立先验数据集。对于实践工程师来说，该方法相对简单，可以使用VBA来理解和实现电子表格。这里给出了一个数字示例以进行说明。进一步的应用将在大会上介绍。

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