城市复杂环境地下互通立交工程数字化应用

桥梁选型是一项包含多影响因素的系统性决策过程，为了提高桥型选择的客观性和合理性，建立了一种以全寿命周期适应性作为评价指标的桥梁选型模型，该模型以适应性评估作为目标层，以安全、适用、经济、耐久、美观、环保作为准则层。在此基础上，引入了一种主客观相结合的方法确定评价指标权重，最后对典型建设条件下几种常见中小跨径桥梁进行了适用性评估，验证了选型方法的可行性。

Study on Selection Method of Bridge Type Based on Adaptation Assessment

The selection of bridge type is a systematic decision-making process which contains many influence factors. In order to improve the objectivity and rationality of the bridge type selection, a selection model of bridge type with the whole life cycle adaptability as the assessment index is established. This model takes the adaptation assessment as the target layer and takes the safety, application, economy, durability, beauty and environmental protection as the criterion layer. On this basis, a method combining subjective and objective is introduced to determine the weight of evaluation indexes. Finally, the applicability of several common small and medium span bridges under the typical construction conditions is evaluated, and the feasibility of the type selection method is verified.