ABSTRACT

The inerter-based systems have proven to be effective for vibration control of adjacent structures. The interaction through the soil medium between adjacent structures in urban areas is generally accepted. However, existing studies concerning the inerter-based adjacent structures are primarily based on the assumption of a fixed base, without considering the inevitable interaction. To address this issue, this study incorporated the soil effects into the theoretical analysis of adjacent structures interconnected by an inerter system, and correspondingly develops an optimal design framework for such system. Employing a classic discrete model for structures and soil, the interaction behavior between inerter-based adjacent structures and soil was extensively studied in a comparative analysis. Based on the revealed interaction phenomena, the need for considering the soil condition in the design of an inerter system for adjacent structures was addressed, and a performance-demand-based optimal design framework was developed. The results indicated that for inerter-based adjacent structures spaced closely, the coupled interaction effect of soil and structure requires careful consideration, especially in soft soil conditions. Owing to the soil effects, the inerter system exhibited a weakened effectiveness for displacement reduction. A larger inner deformation of the inerter system is required to meet the demand for energy dissipation. With consideration of the soil condition, the proposed design method can satisfy the pre-specified target displacement demands for adjacent structures, simultaneously optimizing the control cost as an economical solution.

摘要

基于惯性的系统已被证明对相邻结构的振动控制是有效的。城市地区相邻结构之间通过土壤介质的相互作用被普遍接受。然而，现有关于基于惰性的相邻结构的研究主要基于固定基础的假设，没有考虑不可避免的相互作用。为了解决这个问题，本研究将土壤效应纳入由惰性系统互连的相邻结构的理论分析中，并相应地为该系统开发了一个优化设计框架。采用经典的结构和土壤离散模型，在比较分析中广泛研究了基于惰性的相邻结构与土壤之间的相互作用行为。基于揭示的相互作用现象，解决了在设计相邻结构的惰性系统时考虑土壤条件的必要性，并开发了基于性能需求的优化设计框架。结果表明，对于间距较近的基于惰性气体的相邻结构，需要仔细考虑土壤与结构的耦合相互作用效应，尤其是在软土条件下。由于土壤的影响，惰性系统表现出减弱的位移减少效果。为了满足能量耗散的需求，需要更大的惰性系统内部变形。考虑到土壤条件，所提出的设计方法可以满足相邻结构预先指定的目标位移需求，同时优化控制成本，作为一种经济的解决方案。