本文選題：兵器科學(xué)與技術(shù) + 爆炸荷載　； 參考：《兵工學(xué)報(bào)》2016年08期

【摘要】：為研究鋼筋混凝土梁在爆炸波作用下的毀傷判據(jù),對(duì)兩種尺寸的鋼筋混凝土梁在縮比條件下進(jìn)行了不同爆炸距離作用和裝藥量下的試驗(yàn)研究。試驗(yàn)中以高層和框架結(jié)構(gòu)中最常見的兩種梁為研究對(duì)象,通過11次獨(dú)立的爆炸試驗(yàn),觀測(cè)了鋼筋混凝土梁在不同裝藥量下的破壞模式和破壞特征。研究結(jié)果表明:鋼筋混凝土梁在近區(qū)爆炸荷載作用下,在同一爆高下,隨著裝藥量的增加,梁的破壞程度逐漸增加,破壞模式由迎爆面中心兩側(cè)少量混凝土脫落和背爆面少量斷裂裂紋逐漸增加為迎爆面倒三角錐形式混凝土壓碎彎曲破壞,背爆面出現(xiàn)三角錐裂紋和背爆面少量混凝土脫落破壞,最終迎爆面和背爆面三角錐破壞區(qū)域貫通形成中心區(qū)域壓碎崩塌彎曲破壞;崩塌區(qū)域的尺寸隨著裝藥量增加而逐漸增加。近區(qū)爆炸(以爆距0.5 m為例)作用下,試驗(yàn)鋼筋混凝土梁的毀傷判據(jù)為:當(dāng)比例爆高Z0.4 m/kg1/3時(shí),梁遭受到輕微破壞;當(dāng)比例爆高0.3 m/kg1/3Z0.4 m/kg1/3時(shí),梁遭受到中等破壞;當(dāng)比例爆高0.28 m/kg1/3Z0.3 m/kg1/3時(shí),混凝土梁遭受重度破壞;當(dāng)比例爆高Z0.28 m/kg1/3,梁遭受嚴(yán)重破壞。在近區(qū)爆炸作用下,鋼筋混凝土梁的破壞不僅依賴于爆炸比例距離,還與爆高有關(guān),同一比例距離下爆高越大,梁試件的破壞越嚴(yán)重。研究結(jié)果可為工程應(yīng)用及毀傷評(píng)估提供參考。
[Abstract]:In order to study the damage criterion of reinforced concrete beam under the action of explosion wave, the experimental study of two kinds of reinforced concrete beams under the condition of different explosion distance and charge quantity was carried out under the condition of shrinkage ratio. Two kinds of beams which are most common in tall buildings and frame structures are taken as research objects. The failure modes and characteristics of reinforced concrete beams under different charge amounts are observed through 11 independent explosion tests. The results show that the damage degree of reinforced concrete beams increases gradually with the increase of charge under the same explosion height under the action of near area explosion load. The failure mode is gradually increased from a small amount of concrete shedding on both sides of the center of the face to a small amount of fracture crack on the back blasting surface. Finally, the fracture area of the triangle cone of the face and the back surface is broken through the center area, and the size of the collapse area increases gradually with the increase of charge quantity. Under the action of near area explosion (taking the explosion distance 0. 5 m as an example), the damage criterion of the test reinforced concrete beam is as follows: when the proportional blast height is 0. 4 m/kg1/ 3, the beam suffers slight damage, and when the proportional explosion height is 0. 3 m / kg 1 / 3 Z 0. 4 m/kg1/ 3, the beam suffers moderate damage. When the proportional blast height is 0.28 mkg1 / 3Z0.3 m/kg1/ 3, the concrete beam suffers severe damage, and when the proportional blast height is 0.28 m / kg 1 / 3, the beam suffers serious damage. The failure of reinforced concrete beam depends not only on the proportional distance of explosion, but also on the height of explosion. The bigger the height of explosion is, the more serious the damage of beam specimen is. The results can provide reference for engineering application and damage assessment.
【作者單位】： 總參謀部工程兵科研三所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11302261) 國(guó)家自然科學(xué)基金委員會(huì)與河南省聯(lián)合基金項(xiàng)目(U1404107)
【分類號(hào)】：O383;TU375.1

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本文編號(hào)：2018968