应用于砌筑填充墙的速接式轻钢构造柱研究
发布时间：2019-05-20 14:19
【摘要】：我国的建筑工程填充墙大多采用砌块砌筑,需要在结构的相关部位增设钢筋混凝土构造柱,保障对填充墙的约束作用,避免在地震时墙体散落。在长期工程实践过程中,传统的钢筋混凝土构造柱施工困难,存在混凝土浇捣不密实等质量通病。其设计用材、施工工艺等,已经不适宜现代建筑材料和施工方法,更不能满足快速施工、缩短工期的要求。为此,本文研究一种新型的轻钢构造柱来替代传统的钢筋混凝土构造柱,实现工业化生产,现场快速组装,以提高工效、降低成本、确保工程质量。本文围绕轻钢构造柱技术开展的主要研究工作如下:(1)根据工程需要设计了一字墙,T型墙,十字型墙,L型墙的轻钢构造柱截面。考虑工程抗震最不利情况,研究轻钢构造柱应用于一字墙的受力特性和约束墙体的作用效果。进行轻钢构造柱和传统混凝土构造柱约束的墙片试件的对比试验。通过对比墙片试件极限承载力、墙体和构造柱的破坏形态及最大位移、拉结筋应力等,证明了轻钢构造柱在墙体受到水平荷载作用下,有效约束墙体位移,其作用效果优于混凝土构造柱。轻钢构造柱与墙体连接可靠,且自身刚度大位移很小,应力远小于钢材屈服强度,有较大的安全储备。(2)采用有限元软件ABAQUS,建立轻钢构造柱约束墙体试件在平面外水平荷载作用下的理论分析模型。模拟结果与试验数据吻合较好,验证了有限元模型的准确性和可靠性。同时,有限元模拟结果可作为对轻钢构造柱墙片试验数据的补充,通过应力云图和位移云图,全面了解轻钢构造柱墙片试件的受力特征和应力变化规律。(3)通过有限元软件进行轻钢构造柱应用范围扩展模拟。模拟了墙长5m~10m,高度2.5m~4m范围的8个模型。对比分析构造柱受力、墙体位移及拉结筋受力,了解轻钢构造柱受力变化的特点,提出工程应用改进设计和构造要求的建议。轻钢构造柱强度和刚度均满足使用要求,且与墙体连接可靠。但墙体长度越大,墙体自身跨中挠度增加;墙体高度越大,构造柱自身位移增加,约束墙体边界位移的能力下降,宜采取适当的构造措施。
[Abstract]:Block masonry is mostly used in the filling wall of construction engineering in our country, so it is necessary to add reinforced concrete structural columns to the relevant parts of the structure to ensure the restraint effect on the filled wall and avoid the wall scattered in earthquake. In the process of long-term engineering practice, the construction of traditional reinforced concrete structural columns is difficult, and there are some common problems such as the quality of concrete pouring is not dense and so on. Its design material, construction technology and so on, are no longer suitable for modern building materials and construction methods, and can not meet the requirements of rapid construction and shortening the construction period. Therefore, this paper studies a new type of light steel structural column to replace the traditional reinforced concrete structural column to realize industrial production and field rapid assembly in order to improve work efficiency, reduce cost and ensure engineering quality. The main research work of this paper is as follows: (1) according to the engineering needs, the light steel structural column sections of one-word wall, T-wall, cross-shaped wall and L-shaped wall are designed. Considering the most unfavorable seismic situation of the project, the mechanical characteristics of the light steel structural column applied to the one-word wall and the effect of the confined wall are studied. The comparative test of wall specimens constrained by light steel structural columns and traditional concrete structural columns is carried out. By comparing the ultimate bearing capacity of wall specimens, the failure form and maximum displacement of wall and structural column, and the stress of tension bar, it is proved that the light steel structural column can effectively restrain the displacement of wall under horizontal load. Its effect is better than that of concrete structural columns. The connection between light steel structural column and wall is reliable, and its stiffness is very small, the stress is much smaller than the yield strength of steel, and has a large safety reserve. (2) the finite element software ABAQUS, is used. The theoretical analysis model of light steel structural column confined wall specimen under horizontal load outside plane is established. The simulation results are in good agreement with the experimental data, which verifies the accuracy and reliability of the finite element model. At the same time, the finite element simulation results can be used as a supplement to the test data of light steel structure column wall, through stress cloud diagram and displacement cloud picture, The stress characteristics and stress variation of light steel structural column wall specimens are comprehensively understood. (3) the application range of light steel structural columns is simulated by finite element software. Eight models with wall length 5 m 鈮，
本文编号：2481705
[Abstract]:Block masonry is mostly used in the filling wall of construction engineering in our country, so it is necessary to add reinforced concrete structural columns to the relevant parts of the structure to ensure the restraint effect on the filled wall and avoid the wall scattered in earthquake. In the process of long-term engineering practice, the construction of traditional reinforced concrete structural columns is difficult, and there are some common problems such as the quality of concrete pouring is not dense and so on. Its design material, construction technology and so on, are no longer suitable for modern building materials and construction methods, and can not meet the requirements of rapid construction and shortening the construction period. Therefore, this paper studies a new type of light steel structural column to replace the traditional reinforced concrete structural column to realize industrial production and field rapid assembly in order to improve work efficiency, reduce cost and ensure engineering quality. The main research work of this paper is as follows: (1) according to the engineering needs, the light steel structural column sections of one-word wall, T-wall, cross-shaped wall and L-shaped wall are designed. Considering the most unfavorable seismic situation of the project, the mechanical characteristics of the light steel structural column applied to the one-word wall and the effect of the confined wall are studied. The comparative test of wall specimens constrained by light steel structural columns and traditional concrete structural columns is carried out. By comparing the ultimate bearing capacity of wall specimens, the failure form and maximum displacement of wall and structural column, and the stress of tension bar, it is proved that the light steel structural column can effectively restrain the displacement of wall under horizontal load. Its effect is better than that of concrete structural columns. The connection between light steel structural column and wall is reliable, and its stiffness is very small, the stress is much smaller than the yield strength of steel, and has a large safety reserve. (2) the finite element software ABAQUS, is used. The theoretical analysis model of light steel structural column confined wall specimen under horizontal load outside plane is established. The simulation results are in good agreement with the experimental data, which verifies the accuracy and reliability of the finite element model. At the same time, the finite element simulation results can be used as a supplement to the test data of light steel structure column wall, through stress cloud diagram and displacement cloud picture, The stress characteristics and stress variation of light steel structural column wall specimens are comprehensively understood. (3) the application range of light steel structural columns is simulated by finite element software. Eight models with wall length 5 m 鈮，
本文编号：2481705
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