| 钢管束结构中混凝土楼板开裂分析 |
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| 引用本文： | 钱匡亮,程鹏允,张利锋,钱晓倩.钢管束结构中混凝土楼板开裂分析[J].建筑科学与工程学报,2021,0(1):107-116. |
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| 作者姓名： | 钱匡亮 程鹏允 张利锋 钱晓倩 |
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| 作者单位： | (浙江大学 建筑工程学院,浙江 杭州 310058) |
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| 摘 要： | 针对钢管混凝土束剪力墙结构(简称钢管束结构)中现浇混凝土楼板出现的开裂问题进行有限元分析研究,找出楼板开裂的原因并针对性地给出预防建议。根据钢管束结构不同于混凝土结构的特点,利用ANSYS建立了一套不同于传统设计方法的钢管束结构有限元建模方法,按照实际工程设计文件进行有限元建模分析。结果表明:在正常使用阶段,楼板板面双向应力较大的位置集中在横向、纵向承重构件附近,楼板板底双向应力在跨中位置比较大; 在施工阶段,考虑楼板自重、温度变化和混凝土收缩的影响,楼板板底拉应力最大的区域出现在钢管混凝土束剪力墙等承重构件附近; 楼板应力云图与现场裂缝分布情况有较高的一致性,所提出的建模方法能较好地反映钢管束结构中楼板的受力情况; 根据开裂楼板的配筋验算结果,建议在钢管混凝土束剪力墙周边板格和靠近钢管混凝土柱的板格增加配筋用量。
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| 关 键 词： | 钢管束结构 混凝土楼板 建模分析 裂缝 配筋 |
Analysis of Cracking of Concrete Floor Slabs in Steel-tube-bundle Structure |
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| QIAN Kuang-liang,CHENG Peng-yun,ZHANG Li-feng,QIAN Xiao-qian.Analysis of Cracking of Concrete Floor Slabs in Steel-tube-bundle Structure[J].Journal of Architecture and Civil Engineering,2021,0(1):107-116. |
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| Authors: | QIAN Kuang-liang CHENG Peng-yun ZHANG Li-feng QIAN Xiao-qian |
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| Affiliation: | (College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China) |
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| Abstract: | In light of the cracking problems of cast-in-situ concrete floor slabs in the concrete-filled steel-tube-bundle shear wall structure(steel-tube-bundle structure), the finite element analysis and research were conducted to find out the causes of cracking of floor slabs, and the preventive suggestions were provided. According to the characteristics of the steel-tube-bundle structure different from the concrete structure, a set of finite element modeling methods for the steel-tube-bundle structure different from the traditional design methods were established by using ANSYS, and the finite element modeling analysis was carried out according to the actual engineering design file. The results show that in the normal use stage, the location of larger biaxial stress is concentrated near the transverse and longitudinal load-bearing members on the floor slab surface, and is mainly concentrated on mid-span at bottom of floor slab. In the construction stage, considering the impact of the weight of floor slab, temperature changes and concrete shrinkage, the maximum tensile stress at the bottom of floor slab occurs near the load-bearing members such as concrete-filled steel-tube-bundle shear walls. The stress cloud diagram of the floor has a high consistency with the crack distribution on site, which indicates that the proposed modeling methods can better reflect the stress of the floor slab in the steel-tube-bundle structure. According to the reinforcement check results of the cracked floor slab, it is recommended to increase the amount of reinforcement in the grid around the concrete-filled steel-tube-bundle shear walls and the concrete-filled steel-tube columns. |
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| Keywords: | steel-tube-bundle structure concrete floor slab modeling analysis crack reinforcement |
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