（解放军理工大学爆炸冲击防灾减灾国家重点实验室, 南京 210007）

［摘要］我国现有的抗爆设计方法主要以构件抗力或是极限变形作为设计依据。本文则另辟蹊径，提出了一种基于能量概念的RC梁抗爆设计方法，通过典型算例验证了该方法的有效性，并将此方法与传统基于力的设计方法进行了对比和讨论；同时还利用提出的基于能量的抗爆设计方法分析了截面尺寸和材料强度对RC梁造价的影响。结果表明：在进行抗爆设计时，钢筋对抗力设计的影响不可忽略；梁的造价与钢筋和混凝土价格比有关，降低RC梁造价的推荐做法是增大梁宽和钢筋屈服强度。

［关键词］抗爆设计； 能量法； RC梁； 配筋率； 优化

中图分类号： TU318 文献标识码： A文章编号：  1002-848X(2016)S1-0696-06

Energy-based optimum blast-resistant design and research for RC beam

Zhang Diandian, Yu Runqing， Zhang Xiaocheng

(State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact,

PLA University of Science and Technology, Nanjing 210007, China)

Abstract: The blast-resistant design method used in China at present is mainly SDOF that use resistant or displacement as the failure criterion, namely resistant-based blast-resistant design method(RBRD) and displacement-based blast-resistant design method(DBRD). In this paper, a new SDOF energy-based blast-resistant design method (EBRD) was proposed and explained in detail with a typical RC beam example. The comparison and discussion between EBRD and RBRD was made. Then, the influence of cross-sectional dimensions and material strength on the cost of RC beams were discussed. Results show that, the influence of reinforcement ratio on the resistant should not be ignored. Besides, the cost of RC beams and the price ratio between steel and concrete are related, the best approach to reduce the cost of RC beams is to increase the beam width or reinforcement yield strength. 

Keywords: blast-resistant design; energy-based; RC beam; ratio of reinforcement; optimization

作者简介： 张典典，硕士研究生，Email:472885951@qq.com。

*国家自然科学基金面上项目(51478467,51378016)。