| 水工结构高强钢筋混凝土梁受剪性能试验研究 |
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| 引用本文： | 李朋,郑鸿飞,张宪堂,张永波.水工结构高强钢筋混凝土梁受剪性能试验研究[J].实验力学,2016,31(2):253-262. |
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| 作者姓名： | 李朋 郑鸿飞 张宪堂 张永波 |
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| 作者单位： | 1. 山东科技大学土木工程与建筑学院,山东青岛266590;山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590;2. 青岛国家海洋科学研究中心,山东青岛,266071 |
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| 基金项目： | 山东省自然科学基金面上项目(ZR2013EEM023)；山东省优秀中青年科学家科研奖励基金项目(BS2015HZ017)；山东省土木工程防灾减灾重点实验室开放课题基金项目(CDPM2013ZR01)；山东科技大学人才引进科研启动基金项目(2013RCJJ032)；青岛市博士后研究人员应用研究项目(01020120406)资助 |
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| 摘 要： | 通过对12根配置高强箍筋的混凝土梁在集中荷载作用下的受剪试验,研究梁的挠度、箍筋应变、斜裂缝扩展规律及破坏形态。依据现行《水工混凝土结构设计规范》,对比分析试验梁斜截面承载力及考虑荷载长期作用的正常使用阶段斜裂缝宽度。研究结果表明,配置高强箍筋的混凝土梁斜向开裂规律和受力特征与普通钢筋混凝土梁基本相同,受剪承载力可按现行《水工混凝土结构设计规范》公式计算,且有较高安全储备。当考虑荷载长期作用,HRBF500钢筋在水工结构中抗拉强度设计值取360MPa时,斜裂缝宽度满足正常使用极限状态要求。
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| 关 键 词： | 水工结构 高强钢筋 受剪性能 极限承载力 正常使用极限状态 |
Experimental Investigation on Shear Performance of High Strength Rebar Reinforced Concrete Beam in Hydro-structure |
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| LI Peng,ZHENG Hong-fei,ZHANG Xian-tang and ZHANG Yong-bo.Experimental Investigation on Shear Performance of High Strength Rebar Reinforced Concrete Beam in Hydro-structure[J].Journal of Experimental Mechanics,2016,31(2):253-262. |
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| Authors: | LI Peng ZHENG Hong-fei ZHANG Xian-tang and ZHANG Yong-bo |
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| Institution: | 1.College of Architecture and Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China; 2.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;1.College of Architecture and Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China; 2.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;1.College of Architecture and Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China; 2.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;National Oceanographic Center of Qingdao, Qingdao 266100, Shandong, China |
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| Abstract: | Based on shear experiment for 12 concrete beams rainforced by high-strength HRBF500 rebar subjected to concentrated loading action, the beam deflection, rebar strain, diagonal crack growth pattern and failure mode were investigated. According to current design code for hydraulic concrete structure, comparison analysis for the beam oblique cross section bearing capacity and the oblique crack width in normal limit stage was carried out. Results show that the diagonal crack growth pattern and stress characteristics of beams reinforced by high strength HRBF500 rebar is as same as the commonly reinforced concrete beams. The shear bearing capacity can be calculated by the formula published in design code for hydraulic concrete structure, which has higher safety reserve. Taking into account the influence of long-term load effects, when the recommended design value of tensile strength of HRBF500 rebar is taken as 360MPa, the diagonal crack width of reinforced concrete beam can meet the requirement of normal limit state. |
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| Keywords: | hydro-structure high strength rebar shear performance ultimate bearing capacity normal limit state |
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