| 负弯矩作用下腹板开洞组合梁抗剪性能试验研究 |
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| 引用本文： | 廖文远,周东华,李龙起,韩春秀,姚凯程.负弯矩作用下腹板开洞组合梁抗剪性能试验研究[J].四川大学学报(工程科学版),2014,46(4):46-52. |
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| 作者姓名： | 廖文远 周东华 李龙起 韩春秀 姚凯程 |
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| 作者单位： | 昆明理工大学土木工程学院,昆明理工大学土木工程学院,昆明理工大学土木工程学院,昆明理工大学土木工程学院,昆明理工大学土木工程学院 |
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| 基金项目： | 国家自然科学基金:带腹板开洞连续组合梁的受力性能及承载力研究（51268022）国家青年科学基金:预应力腹板开洞组合梁受力性能及承载力研究（51308269） |
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| 摘 要： | 摘 要：通过对集中荷载作用下的腹板开洞钢-混凝土组合梁进行试验，研究在负弯矩作用下腹板开洞组合梁的抗剪力学性能。试验结果表明：负弯矩作用下的组合梁腹板开洞后，其刚度和承载力降低很大，洞口区域截面不再符合平截面假定；破坏形式为洞口区混凝土板的剪切破坏，同时洞口区的部分栓钉连接件出现了拔脱现象；另外，通过增加混凝土翼板厚度可以提高负弯矩区腹板开洞组合梁的承载力，增加纵向钢筋配筋率可以提高其变形能力。研究为负弯矩区腹板开洞组合梁的有限元分析和实际应用提供了试验数据。
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| 关 键 词： | 组合梁 腹板开洞 负弯矩作用 抗剪性能 试验研究 |
| 收稿时间： | 2014/2/18 0:00:00 |
| 修稿时间： | 2014/3/26 0:00:00 |
Experimental Study on Shear Behavior of Composite Beams with Web Opening Under Negative Moment |
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| Liao Wenyuan,Zhou Donghu,Li Longqi,Han Chunxiu and Yao Kaicheng.Experimental Study on Shear Behavior of Composite Beams with Web Opening Under Negative Moment[J].Journal of Sichuan University (Engineering Science Edition),2014,46(4):46-52. |
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| Authors: | Liao Wenyuan Zhou Donghu Li Longqi Han Chunxiu and Yao Kaicheng |
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| Affiliation: | College of Civil Eng.,Kunming Univ. of Sci. and Technol.;College of Civil Eng.,Kunming Univ. of Sci. and Technol.;College of Civil Eng.,Kunming Univ. of Sci. and Technol.;College of Civil Eng.,Kunming Univ. of Sci. and Technol.;College of Civil Eng.,Kunming Univ. of Sci. and Technol. |
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| Abstract: | Abstract: In order to investigate the shear behavior of composite beam with web opening under negative moment, simply supported composite beam under concentrated load were tested. The test results show that the stiffness and ultimate capacity decreases significantly after web opening and the plane hypothesis is not satisfied any more. The failure mode is shear fracture in concrete slab near the opening area, and some stud connectors in opening area were pulled off. The ultimate load bearing capacity and deformation capacity can be effectively enhanced by increasing the thickness and reinforcement ratio of a concrete slab. Experimental basis for the EFA and the application of composite beams with web openings under negative moment are provided.
Key words: composite beam; web opening; negative moment; shear behavior; experimental study |
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| Keywords: | composite beam web opening negative moment shear behavior experimental study |
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