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首页> 外文期刊>Bulletin of earthquake engineering >An efficient approach for LCC-based optimum design of lead-rubber base isolation system via FFD and analysis of variance (ANOVA)
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An efficient approach for LCC-based optimum design of lead-rubber base isolation system via FFD and analysis of variance (ANOVA)

机译：基于LCC的LCC基础隔离系统的高效方法，通过FFD和方差分析（ANOVA）

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摘要

A framework for optimal design of lead rubber bearing (LRB) system is introduced based on the initial and life cycle cost of structures. The purpose of this framework is to minimize the initial and life cycle cost of building and simultaneously improve the seismic performance of the base isolated structure. Endurance time (ET) method is used to predict the seismic response of the building at continuous levels of hazard intensity. Before implementing the optimization process, a full factorial design is utilized, and the seismic performance of a total of 128 lead rubber base isolated structures with varying LRB design parameters is assessed using the ET analysis method. Accordingly, the parameters with the most significant impact on the responses are determined by the analysis of variance. These parameters are used as design variables in a multi-objective genetic algorithm to minimize the initial and life cycle cost of the building with LRB system. The cost analysis of the system requires evaluation of initial costs including the costs associated with the implementation of LRBs. To date, no appropriate cost model has been proposed for LRB systems in the literature; therefore, a simplified cost model for LRBs is developed. Also, a life cycle cost model is used to evaluate the structural performance in the form of economic measures based on the results obtained from the ET analysis. In order to illustrate the method, a prototype six-story building is studied here. According to the results, the proposed approach is found to be effective in reducing the initial and life cycle cost of the building with an acceptable amount of computational effort.
机译：基于结构的初始和生命周期成本，引入了铅橡胶轴承（LRB）系统的最佳设计框架。该框架的目的是最大限度地减少建筑物的初始和生命周期成本，同时提高底座隔离结构的地震性能。耐力时间（ET）方法用于预测建筑物在连续危害强度水平的地震响应。在实现优化过程之前，利用完整的因子设计，并且使用ET分析方法评估具有不同LRB设计参数的128个铅橡胶基底隔离结构的地震性能。因此，通过对差异的分析来确定具有对响应最显着影响的参数。这些参数用作多目标遗传算法中的设计变量，以最大限度地利用LRB系统最小化建筑物的初始和生命周期成本。系统的成本分析需要评估初始成本，包括与LRB执行相关的成本。迄今为止，没有针对文献中的LRB系统提出适当的成本模型;因此，开发了LRB的简化成本模型。此外，使用寿命周期成本模型用于评估基于从ET分析获得的结果的经济措施形式的结构性能。为了说明该方法，这里研究了原型六层建筑。根据结果​​，发现所提出的方法有效地降低了建筑物的初始和生命周期成本，以可接受的计算工作量。

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