斜交网格筒角部复杂节点传力路径及局部失稳研究

发布时间：2018-04-17 03:29

本文选题：斜交网格筒 + 空间弯曲节点　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：目前斜交网格筒结构力学性能研究多集中于结构整体受力性能分析，忽略了局部复杂区域对结构整体受力效应及局部失稳的影响。基于这一背景，本文首先分析了结构局部复杂区域的力学特性以及其对结构内力分布的影响；并建立了现场实测系统，基于实测相关构件应力分布及变化结果，，验证了前述分析结论，最后通过结构稳定性分析，探讨了局部复杂对结构失稳的影响。局部复杂区域对结构内力分布影响研究。针对斜交网格外筒角部存的局部复杂区域，通过改变角部空间节点的模型参数建立不同折线模型。探讨了在竖向和侧向荷载作用下该节点区域传力路径和内力分布特点。分析了复杂局部区域对结构整体以及局部相关构件内力分布的影响。并给出了选取此类空间节点模型参数的建议。基于现场实测系统的局部复杂区域内力分布特性验证。依托实际斜交网格筒超高层结构，对该结构角部复杂区域建立现场应力监测系统，实测了相关构件施工过程中的应力变化，并与施工过程模拟结果进行对比分析。揭示了实测中环梁轴力以及斜柱弯矩的变化规律，补充说明了角部区域的复杂性，验证了结构局部复杂区域、相关构件的传力路径以及内力分布特点。局部复杂区域对结构失稳的影响研究。通过结构稳定性分析，从角部斜柱传力方式和局部复杂区域内力分布两方面考察导致结构失稳的因素，给出了结构中易失稳区域的位置以及失稳顺序。讨论了局部复杂区域受力特性与结构失稳顺序的关系。
[Abstract]:At present, the research on the mechanical properties of oblique reticulated tube structures is mainly focused on the analysis of the overall mechanical behavior of the structure, ignoring the influence of the local complex region on the overall stress effect and the local instability of the structure.Based on this background, this paper first analyzes the mechanical characteristics of the local complex region of the structure and its influence on the distribution of the internal force of the structure, and establishes a field measurement system, based on the measured results of the stress distribution and the variation of the components.Finally, the influence of local complexity on structural instability is discussed through structural stability analysis.The influence of local complex region on the internal force distribution of the structure is studied.Different broken line models are established by changing the model parameters of the spatial node of the angle for the local complex region of the extra corner of the oblique intersecting network.The distribution characteristics of transmission path and internal force in the joint region under vertical and lateral loads are discussed.The influence of the complex local region on the internal force distribution of the whole structure and the local related members is analyzed.The suggestion of selecting the parameters of the spatial node model is also given.Verification of internal force distribution in local complex region based on field measurement system.The field stress monitoring system is established for the complex region of the corner of the structure based on the actual super tall structure of oblique grid tube. The stress changes in the construction process of the related components are measured and compared with the simulation results of the construction process.The variation law of the axial force and the bending moment of the oblique column is revealed, the complexity of the corner region is explained, and the characteristics of the transmission path and the internal force distribution of the related members are verified.The influence of local complex region on structural instability is studied.By analyzing the stability of the structure, the factors leading to the instability of the structure are investigated from the angle inclined column force transfer mode and the distribution of the internal force in the local complex region, and the position and the instability sequence of the unstable region in the structure are given.The relationship between the stress characteristics of the local complex region and the instability sequence of the structure is discussed.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.1

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