| 基于修正压力场理论的再生混凝土梁抗剪承载力计算方法研究 |
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| 引用本文： | 刘超,王芯苗,樊金承,农翔云,王有强.基于修正压力场理论的再生混凝土梁抗剪承载力计算方法研究[J].应用力学学报,2021(1):375-381. |
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| 作者姓名： | 刘超 王芯苗 樊金承 农翔云 王有强 |
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| 作者单位： | 西安建筑科技大学;同济大学 |
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| 基金项目： | 国家自然科学基金(51878546);陕西省杰出青年科学基金(2020JC-46);陕西省创新人才推进计划(2018KJXX-056);陕西省科技创新基地(2017KTPT-19);陕西省重点研发计划(2018ZDCXL-SF-03-03-02);陕西省混凝土结构安全与耐久性重点实验室开放基金(XJKFJJ201904)。 |
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| 摘 要： | 基于修正压力场理论分析有腹筋再生混凝土梁的剪切破坏机理,建立了更接近有腹筋再生混凝土梁实际受力的抗剪模型,并通过考虑再生骨料有效粒径和受箍筋作用下的裂缝宽度与构件裂缝处应力的联系,分析了再生骨料咬合力对梁斜截面抗剪性能的影响,提出了再生混凝土梁极限抗剪承载力的计算方法。此外,本文将理论结果与课题组自制的6根再生混凝土梁的抗剪承载力试验结果进行了对比,理论值与试验值吻合较好,验证了本文方法的有效性,从而为设计人员提供了一种预测再生混凝土梁极限抗剪承载力的计算方法。
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| 关 键 词： | 修正压力场理论 再生混凝土 骨料有效粒径 骨料咬合力 抗剪承载力 |
A new calculation method of shear capacity of recycled concrete beams based on the modified compression field theory |
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| Liu Chao,Wang Xinmiao,Fan Jincheng,Nong Xiangyun,Wang Youqiang.A new calculation method of shear capacity of recycled concrete beams based on the modified compression field theory[J].Chinese Journal of Applied Mechanics,2021(1):375-381. |
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| Authors: | Liu Chao Wang Xinmiao Fan Jincheng Nong Xiangyun Wang Youqiang |
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| Institution: | (Xi’an University of Architecture and Technology,710055,Xi’an,China;Tongji University,200092,Shanghai,China) |
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| Abstract: | In this paper, the mechanisms of shear failure for recycled aggregate concrete beam is analyzed based on the modified compression field theory, and a shear model of recycled aggregate concrete beam with web reinforcement is established, which is closer to actual mechanical behavior. The influence of the bite force of the recycled aggregate on the shear resistance of the inclined beam section is analyzed by considering the recycled aggregate effective particle size and the relationship between the crack width under the stirrup influence and the stress at the member crack. After that, the calculation method of ultimate shear capacity for recycled aggregate concrete beam is proposed. Finally, the theoretical calculation results are compared with the results of the shear capacity test with six recycled aggregate concrete beams conducted by ourselves. It reveals that the theoretical results coincide well with those from the experimental measurements, which verifies the effectiveness. The present method provides us guidelines for predicting the ultimate shear capacity of recycled aggregate concrete beams. |
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| Keywords: | the modified compression field theory recycled concrete effective aggregate size aggregate interlock capacity shear capacity |
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