传媒广场中庭弧形屋面钢结构施工过程分析与监控

发布时间：2019-07-06 11:49

【摘要】：由中亿丰建设集团股份有限公司承建的苏州广播电视总台现代传媒广场项目办公楼中庭屋面采取大高差弧形悬链状钢结构形式,整体造型美观、时尚、别具一格。但正是由于其新颖独特的建筑构造风格造成弧形屋面钢结构施工难度高,施工步骤较为繁杂,因此施工过程分析与实时监控显得尤其重要。弧形屋面钢结构施工采用分段拼装——累积滑移法进行。因此,滑移过程受力分析及实时监控是中庭弧形钢结构屋面施工过程中控制要点。针对中庭弧形钢结构屋面滑移施工方案,应用SAP2000建立了有限元分析模型,分析了施工过程中弧形钢屋面的受力、变形等情况,验证了施工方案的可行性。采用ABAQUS软件建立了滑移支座的三维有限元模型,对中庭弧形钢屋面单榀类悬链状钢梁进行了计算分析,包括钢梁焊接卸载后的内力和变形,为滑移构造提供了依据。对实际施工滑移过程进行了实时监测,分析了监测数据并归纳出弧形类悬链状钢结构的受力特性。相关结果可以供今后类似弧形钢屋面滑移施工方案设计参考。本文的研究结论如下:(1)合理的限位及构造措施,并在滑移过程中保障同步性,是大高差弧形悬链线状钢屋面滑移施工成败的关键;(2)大高差弧形悬链线状钢屋面滑移施工中上下支座竖向受力存在显著差别,顶推力主要分布在上部支座,在编制滑移方案时需重点考虑。(3)上下滑移支座除水平限位外,还需在下支座设置防止结构上翘的竖向限位。(4)钢屋面各榀间系杆不足以承受滑移时各榀弧形钢梁间拉力,在弧形钢梁间需焊接连系梁提高结构整体强度。
文内图片：

图片说明：1屋面钢结构图片
[Abstract]:The atrium roof of Suzhou Radio and Television General Station Modern Media Square Project, built by Zhongyifeng Construction Group Co., Ltd., adopts the form of large height difference arc catenary steel structure, which has beautiful overall shape, fashion and unique style. However, it is precisely because of its novel and unique architectural structure style that the construction of arc roof steel structure is difficult and the construction steps are complicated, so the construction process analysis and real-time monitoring are particularly important. The construction of arc roof steel structure is carried out by piecewise assembly-cumulative slip method. Therefore, the stress analysis and real-time monitoring of sliding process are the key points in the construction of atrium arc steel structure roof. Aiming at the sliding construction scheme of atrium arc steel structure roof, the finite element analysis model is established by using SAP2000, the force and deformation of arc steel roof in the construction process are analyzed, and the feasibility of the construction scheme is verified. The three-dimensional finite element model of sliding support is established by ABAQUS software, and the single catenary steel beam of atrium arc steel roof is calculated and analyzed, including the internal force and deformation of steel beam after welding and unloading, which provides the basis for slip structure. The real-time monitoring of the actual construction slip process is carried out, the monitoring data are analyzed and the mechanical characteristics of the arc catenary steel structure are summarized. The related results can be used as a reference for the design of sliding construction scheme of similar arc steel roof in the future. The conclusions of this paper are as follows: (1) reasonable limit and structural measures, and to ensure synchronization in the process of slip, are the key to the success or failure of sliding construction of arc catenary steel roof with large height difference; (2) there is a significant difference in the vertical force of the upper and lower supports in the sliding construction of the arc catenary steel roof with large height difference. The top thrust is mainly distributed in the upper support, which should be taken into account when compiling the slip scheme. (3) in addition to the horizontal limit, the upper and lower supports should also be set up to prevent the vertical limit of the structure. (4) the tie rods between the steel roof are not enough to withstand the tension between the arc steel beams when the slip is carried out. It is necessary to weld connecting beams between arc steel beams to improve the overall strength of the structure.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU758.11

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