Abstract

Tall buildings are especially prone to damage caused by winds and earthquakes. In practice, only a single hazard is assumed to dominate the design and is adopted for structural verifications. This is also the case when supplemental damping devices such as tuned mass dampers (TMDs) are adopted. Nevertheless, previous research has shown that from a life-cycle cost (LCC) perspective the dominant hazard concept is misleading, and a multi-hazard approach is necessary. This article proposes a methodology for multi-objective optimization-based design of multiple TMDs (MTMDs) attached to tall buildings subjected to both winds and earthquakes. The LCC related to damage on non-structural components is taken as one of the objective functions to join consistently these hazards. The MTMDs initial cost is selected as the second objective function. The results of these multi-objective optimization problems are Pareto fronts of optimized solutions that may be of interest to stakeholders, including non-technical decision makers. A genetic algorithm is adopted as solution strategy. A realistic case study is presented, and the optimization results are compared with classic literature solutions.

摘要

高层建筑特别容易受到风和地震的破坏。在实践中，假设只有一个单一的危害在设计中占主导地位，并被用于结构验证。当采用诸如调谐质量阻尼器 (TMD) 之类的补充阻尼装置时，情况也是如此。然而，先前的研究表明，从生命周期成本 (LCC) 的角度来看，占主导地位的危害概念具有误导性，因此需要采用多危害方法。本文提出了一种基于多目标优化设计的多目标优化设计方法，该方法连接到受风和地震影响的高层建筑上的多个 TMD (MTMD)。与非结构部件损坏相关的 LCC 被视为目标函数之一，以一致地加入这些危害。MTMDs 初始成本被选为第二个目标函数。这些多目标优化问题的结果是优化解决方案的帕累托前沿，利益相关者可能会感兴趣，包括非技术决策者。采用遗传算法作为求解策略。提出了一个现实的案例研究，并将优化结果与经典文献解决方案进行了比较。