干燥和飽和狀態(tài)下混凝土動(dòng)靜態(tài)壓縮性能試驗(yàn)研究及其本構(gòu)關(guān)系*
張永亮1,2,3，朱大勇1,3，姚華彥1,2,3，李永池2，高光發(fā)2，應(yīng)國(guó)柱1,3
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(1 合肥工業(yè)大學(xué)土木與水利工程學(xué)院，合肥 230009； 2 中國(guó)科技大學(xué)近代力學(xué)系，合肥 230027；3 安徽省土木工程結(jié)構(gòu)與材料省級(jí)實(shí)驗(yàn)室，合肥 230009)
［摘要］為研究干燥和飽和狀態(tài)下混凝土的應(yīng)力-應(yīng)變關(guān)系，利用MTS試驗(yàn)機(jī)和大口徑分離式Hopkinson壓桿(SHPB)裝置進(jìn)行了一系列的動(dòng)靜態(tài)的混凝土試驗(yàn)。結(jié)果表明，干燥和飽和狀態(tài)下混凝土的峰值應(yīng)力隨圍壓增大而提高，且峰值應(yīng)力隨應(yīng)變率增大而提高，飽和狀態(tài)下混凝土較干燥狀態(tài)下混凝土峰值應(yīng)力小、變形能力強(qiáng)。采用Hsieh-Ting-Chen四參數(shù)破壞準(zhǔn)則，基于簡(jiǎn)化的單軸損傷演化方程，建立了混凝土的損傷本構(gòu)模型，該模型參數(shù)易得，模型曲線與不同條件下的試驗(yàn)曲線基本一致，便于實(shí)際工程中應(yīng)用。［關(guān)鍵詞］混凝土; 壓縮; 損傷模型; 本構(gòu)關(guān)系中圖分類號(hào)：TU528.1， O346.5 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)12-0023-05
Study on dynamic and static compression performance of concrete for dry and saturated state and its constitutive relationshipZhang Yongliang1,2,3, Zhu Dayong1,3, Yao Huayan1,2,3, Li Yongchi2, Gao Guangfa2, Ying Guozhu1,3(1 School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; 2 Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China; 3 Anhui Key Laboratory of Civil Engineering and Materials, Hefei 230009, China）Abstract: To study the stress-strain relationship of dry and saturated state concrete, a series of dynamic and static tests of concrete were taken by using the MTS tester and the large diameter split Hopkinson pressure bar (SHPB) device. The results show that the peak stress of dry and saturated concrete increases with the confining pressure increasing and raises with the strain rate increasing. The peak stress is smaller under saturated state than under dry state with stronger deformation ability. Based on the simplified damage evolution equation of single axis by using Hsieh-Ting-Chen four parameters failure criterion, a concrete damage constitutive model was established, the parameters of which were easy to be got. The model curve and test curve under different conditions are basically the same. The application of the model is convenient in practical engineering.Keywords:concrete; compression; damage model; constitutive relationship
*國(guó)家自然科學(xué)基金項(xiàng)目（51078123，11102205，11202206， 41402256）。作者簡(jiǎn)介：張永亮，碩士研究生，Email：docter88zhang@163.com。
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