空间缆索自锚式悬索桥的无差别坐标杆分析模型

This study is aimed at the fact that, it is always complex for traditional manners to deal with the calculational problems of self-anchored suspension bridges with spatial cables; based on the main features of such structures on compatibility deformation, a “key function analytical model” and specific numerical algorithms are constructed to study the practical calculational methods of such structures, and 2 facets are included: 1) study the key function models that can reflect the coordination of “cable-tower-deck” in different states, and their transformation mechanisms; 2) combining the transformation mechanisms of the model with the analytical theories, develop the numerical algorithms of the total bridge for the finished dead load and unloaded states, the static analysis on different cases of external loads and the construction process with mixed stretching forms, and further study the automated design algorithms for the hanger installation plan under multiple constrained conditions, in order to avoid the limitations of the current methods, such as “only applicable in a specified condition”, “complexity” and “easy divergence” and etc. The studies can preliminarily reach a level of obtaining the different mechanical states of the bridge by efficient datamation analysis, which are of significant academic value and realistic meaning in guiding the design and construction of such structures.

本课题针对传统方法在处理空间缆索自锚式悬索桥计算问题时的局限性，基于该类桥梁协调变形的主要特征，提出一种“核心作用分析模型”并构建特定数值算法研究该类桥梁的实用分析方法，主要包含二个方面：(1)研究能准确反映各种情况下“索-梁-塔”协作体系特性的核心作用模型及其演化机理；(2) 联合模型演化机理与解析理论，发展成桥与空缆状态，静力分析中不同荷载以及施工过程中各种混合张拉方式下全桥平衡态的高效数值类算法，并进一步建立多重因素制约下吊索张拉方案的自动化设计算法，从而避免当前分析方法的状态限定、步骤复杂和易发散等多种局限性。研究成果可初步达到适用于全桥不同力学阶段的高效数据化分析，对于指导该类桥梁的设计与施工具有重要的学术价值和现实意义。