建筑结构构件基于性能的抗爆设计方法

在我国，基于性能的设计方法已运用于工程结构抗震设计，但尚没有运用在结构抗爆设计。该文将基于性能的设计方法引入结构抗爆领域，提出了基于性能的结构抗爆设计方法，明确了基于性能的抗爆设计中的关键问题，给出了设计思路与步骤。在此基础上，以RC柱为研究对象，以轴心受压承载力损失为性能水平参数，划分了3个等级性能水平；根据典型的爆炸场景，确定爆炸的不同烈度等级，计算出RC柱承受的荷载；针对不同类别的建筑，确定两个水准的抗爆性能目标；结合现有RC柱承载力损失的研究成果，分析不同爆炸烈度下的RC柱的承载力损失，提出RC柱基于承载力损失的性能设计方法；基于确定的性能目标和设计方法，提出RC柱基于性能的抗爆设计步骤；最后，给出了RC柱基于性能的抗爆设计的算例。

PERFORMANCE-BASED BLAST-RESISTANT DESIGN OF BUILDING STRUCTURE COMPONENTS

In China, performance-based design method has been used in the field of seismic design, but not in the field of blast-resistant design yet. This article introduces the performance-based design method into the field of blast-resistant structural design and proposes a performance-based blast-resistant design method. Some key issues during design were highlighted and a general design idea and procedure were proposed. Then, the RC column was chosen as an example, the loss of axial load bearing capacity was chosen as the performance level parameter and three performance levels were determined. By setting typical blast scenarios, the explosion intensity levels were determined. For different types of buildings, two performance objectives were determined. The loss of load carrying capacity of RC columns under different explosion intensity levels were analyzed using existing research results. Then, a design method based on the loss of load carrying capacity was proposed. Based on the determined performance objectives and the design method, the performance-based blast-resistant design of the RC columns was proposed. At the end of this paper, a design of RC columns was presented in order to describe the performance-based blast-resistant design method.