装配式钢管混凝土组合剪力墙分段纤维模型研究

发布时间：2018-04-16 11:39

本文选题：装配式结构 + 组合结构　；参考：《华北理工大学》2017年硕士论文

【摘要】：装配式钢-混凝土组合剪力墙结构是一种新型结构体系,存在大量的节点、水平接缝、竖向接缝连接,这些接缝的受力性能直接决定结构的整体性能。目前国内相关研究多集中在试验研究,按现有规范“等同现浇”理念进行设计,然而在数值计算方面通常未考虑“装配”的因素,与现浇建模方法一致进行分析。文中建立装配式结构的分段纤维模型,通过截面有效面积减少、粘结滑移等参数变化,考虑“装配”因素对结构抗震性能分析的影响,基于Open SEES计算平台和现有试验研究,校核和确认模型关键参数,并进行参数分析,进一步拓宽模型的适用范围和验证其合理性。1)选取GB50010-2010、JGJ1-2014、JGJ1-91、DB11/1003—2013、DB23/T-2010与美国、欧洲等国外规范,结合实例,对比研究规范中关于装配式混凝土结构水平接缝承载力计算方法的异同,结果表明各国规范计算结果存在不同程度差异,验证了装配式混凝土结构设计方法与数值分析中,考虑接缝存在、粘结滑移及构造措施等因素影响的必要性。2)建立装配式钢筋混凝土剪力墙结构的分段纤维模型(Multi-section Fiber Model,即MFM),结合5片装配式混凝土剪力墙构件试验研究,进行数值分析研究,将试验结果与数值分析结果进行对比分析,验证模型及关键参数的合理性。为考虑“装配”的因素,通过钢筋粘结滑移、剪切效应以及约束混凝土面积减少等方面予以参数研究,结果表明考虑参数对钢筋混凝土剪力墙结构的数值分析结果影响较小,数值分析时可不考虑。3)基于OpenSEES有限元分析计算平台,建立装配式钢管混凝土组合剪力墙结构的分段纤维模型,分别基于足尺与考虑竖缝影响的试验研究,校核和确认模型的关键参数,试验结果与数值结果吻合较好,验证模型及关键参数的合理性。通过数值分析,结果表明考虑钢筋粘结滑移、剪切效应以及约束混凝土面积减少等参数对钢管混凝土组合剪力墙结构的数值分析结果影响较小,数值分析时可不考虑。
[Abstract]:The fabricated steel-concrete composite shear wall structure is a new type of structural system, which has a large number of joints, horizontal joints and vertical joints. The mechanical properties of these joints directly determine the overall performance of the structure.At present, most domestic researches focus on experimental research and design according to the concept of "equal cast-in-place" in existing codes. However, the "assembly" factor is usually not considered in numerical calculation, which is consistent with the cast-in-place modeling method.In this paper, the segmented fiber model of assembly structure is established. Through the change of effective area of section, bond slip and other parameters, considering the influence of "assembly" factors on seismic performance analysis of the structure, based on the Open SEES calculation platform and the existing experimental research.Check and confirm the key parameters of the model, and carry out parameter analysis, further widen the applicable scope of the model and verify its rationality. 1) choose GB50010-2010 / JGJ1-2014 / JGJ1-91 / DB11 / 1003-2013 DB23 / T-2010 and other foreign norms such as the United States, Europe, etc.The differences and similarities of calculation methods of horizontal joint bearing capacity of prefabricated concrete structures in the code are compared. The results show that the calculation results of each country are different to different degrees, which verifies the design method and numerical analysis of prefabricated concrete structures.Considering the existence of joints, the necessity of bond-slip and structural measures, etc. (2) to establish the segmented fiber model of prefabricated reinforced concrete shear wall structure, which is called Multi-section Fiber Model, combining with the experimental study of 5 fabricated concrete shear wall members.The results of numerical analysis are compared with the results of numerical analysis to verify the rationality of the model and the key parameters.In order to consider the factors of "assembly", the parameters are studied in the aspects of bond slip, shear effect and the reduction of confined concrete area. The results show that the effect of considering parameters on the numerical analysis results of reinforced concrete shear wall structures is relatively small.In numerical analysis, based on OpenSEES finite element analysis and calculation platform, the segmented fiber model of composite shear wall structure of concrete-filled steel tubular (CFST) is established, which is based on full-scale and experimental research considering the effect of vertical joint, respectively.The key parameters of the model are checked and confirmed. The experimental results agree well with the numerical results, and the rationality of the model and the key parameters is verified.Through numerical analysis, the results show that the influence of the parameters such as bond slip of steel bar, shear effect and reduction of confined concrete area on the numerical results of CFST composite shear wall structure is small, which can not be taken into account in numerical analysis.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2

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