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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

38卷

期数:

2021年01期

页码:

107-116

栏目:

出版日期:

2021-01-20

文章信息/Info

Title:

Analysis of Cracking of Concrete Floor Slabs in Steel-tube-bundle Structure

文章编号:

1673-2049(2021)01-0107-10

作者:

钱匡亮,程鹏允,张利锋,钱晓倩

(浙江大学 建筑工程学院,浙江 杭州 310058)

Author(s):

QIAN Kuang-liang, CHENG Peng-yun, ZHANG Li-feng, QIAN Xiao-qian

(College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China)

关键词:

钢管束结构;  混凝土楼板;  建模分析;  裂缝;  配筋

Keywords:

steel-tube-bundle structure;  concrete floor slab;  modeling analysis;  crack;  reinforcement

分类号:

TU398

DOI:

10.19815/j.jace.2020.05049

文献标志码:

A

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。

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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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2020-05-23
作者简介:钱匡亮(1973-),男,浙江嵊州人,高级工程师,工学博士,E-mail:qklcivil@zju.edu.cn。

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更新日期/Last Update: 2021-01-20