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（北京建筑大學(xué)工程結(jié)構(gòu)與新材料北京市高等學(xué)校工程研究中心， 北京 100044）

［摘要］研究了高強(qiáng)鋼絞線-聚合物砂漿加固鋼筋混凝土柱（簡(jiǎn)稱加固柱）的抗爆性能及損傷程度的評(píng)估。利用ANSYS/LS-DYNA有限元軟件建立了有限元模型，在與鋼筋混凝土柱現(xiàn)場(chǎng)爆炸試驗(yàn)結(jié)果驗(yàn)證基礎(chǔ)上比較了鋼筋混凝土柱及加固柱的動(dòng)力響應(yīng)與破壞模式。然后，依據(jù)構(gòu)件損傷后的剩余承載力指標(biāo)提出了加固柱的損傷評(píng)估準(zhǔn)則，重點(diǎn)分析了不同參數(shù)如鋼絞線直徑、鋼絞線橫向間距、砂漿層厚度及砂漿強(qiáng)度等對(duì)加固柱損傷程度的影響規(guī)律。結(jié)果表明：經(jīng)高強(qiáng)鋼絞線-聚合物砂漿加固后，鋼筋混凝土柱抗爆性能明顯提高，損傷程度由倒塌降低為重度損傷；隨著加固層厚度的增大、砂漿強(qiáng)度的增大、鋼絞線直徑的增大以及鋼絞線橫向間距的減小，損傷指數(shù)均減小。

［關(guān)鍵詞］高強(qiáng)鋼絞線； 聚合物砂漿； 鋼筋混凝土柱； 抗爆性能； 參數(shù)分析

中圖分類號(hào)：TU375-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)04-0083-07

Damage evaluation on blast-resistant behavior of RC columns retrofitted with high strength steel wire mesh-polymer mortar

Zhang Yutang, Liao Weizhang, Shen Shuangjun

(Beijing University of Civil Engineering and Architecture, Beijing Higher Institution Engineering Research Center of Civil Engineering Renewable Material, Beijing 100044, China)

Abstract:Blast-resistant behavior of RC columns retrofitted with high strength steel wire mesh-polymer mortar and evaluation of its damage degree were studied. Firstly, RC columns and retrofitted RC columns were established by using ANSYS/LS-DYNA  to simulate and the blast resistant behavior of RC column specimens were predicted. Numerical results well agreed with the experimental results and test observations.On the basis of verifying the results of field explosion test of reinforced concrete columns, the dynamic response and failure modes of RC columns and retrofitted RC columns were compared. According to the residual capacity of RC columns, the damage assessment criteria of retrofitted columns was proposed, and the influence of different parameters such as strand diameter, strand transverse spacing, mortar layer thickness and mortar strength on the damage degree of retrofitted columns were analyzed and summarized. The results of this study indicated that high strength steel wire mesh-polymer mortar strengthen technology is effective in enhancing the blast resistance behavior of retrofitted RC column. The damage index will be decreased with the increase of the thickness and strength of mortars layer, the increase of the diameter of steel wire and the decrease of the transverse spacing of steel wire.

Keywords:high strength steel wire mesh; polymer mortar; reinforced concrete columns; blast resistant behavior; parameter analysis

*國(guó)家自然科學(xué)基金項(xiàng)目（51378046，51278490）。

作者簡(jiǎn)介：張玉堂，碩士研究生，Email：1033424274@qq.com。