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（解放軍理工大學(xué)爆炸沖擊防災(zāi)減災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室, 南京 210007）

［摘要］我國(guó)現(xiàn)有的抗爆設(shè)計(jì)方法主要以構(gòu)件抗力或是極限變形作為設(shè)計(jì)依據(jù)。本文則另辟蹊徑，提出了一種基于能量概念的RC梁抗爆設(shè)計(jì)方法，通過(guò)典型算例驗(yàn)證了該方法的有效性，并將此方法與傳統(tǒng)基于力的設(shè)計(jì)方法進(jìn)行了對(duì)比和討論；同時(shí)還利用提出的基于能量的抗爆設(shè)計(jì)方法分析了截面尺寸和材料強(qiáng)度對(duì)RC梁造價(jià)的影響。結(jié)果表明：在進(jìn)行抗爆設(shè)計(jì)時(shí)，鋼筋對(duì)抗力設(shè)計(jì)的影響不可忽略；梁的造價(jià)與鋼筋和混凝土價(jià)格比有關(guān)，降低RC梁造價(jià)的推薦做法是增大梁寬和鋼筋屈服強(qiáng)度。

［關(guān)鍵詞］抗爆設(shè)計(jì)； 能量法； RC梁； 配筋率； 優(yōu)化

中圖分類(lèi)號(hào)： TU318 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  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

作者簡(jiǎn)介： 張典典，碩士研究生，Email:472885951@qq.com。

*國(guó)家自然科學(xué)基金面上項(xiàng)目(51478467,51378016)。