弧形预应力混凝土屋面箱梁的施工监测研究

发布时间：2018-08-26 20:39

【摘要】：施工监测关系到工程结构的安全,而目前行业内关于建筑工程中弧形预应力混凝土箱梁的工程施工监测研究很少.结合某学生活动中心场馆的工程实际,为确保施工过程的安全,针对屋面结构中受力较大的异形箱梁构件,制定了专门的监测方案,进行施工全过程跟踪监测.采用有限元分析软件Midas Gen对该场馆"蝴蝶形"屋面结构的施工过程进行数值模拟,按照实际施工步骤,利用单元生死技术分析了屋面关键构件箱梁的应力和位移变化过程,并将实际监测数据与数值模拟结果进行对比.研究表明,实际监测结果与模拟结果吻合较好,证明该施工模拟方法的可行性;施工过程中箱梁的应力及位移在可控范围内,满足施工验收要求.该工作和研究成果对建筑工程中类似大型异形构件的设计和施工有重要的参考价值.
[Abstract]:Construction monitoring is related to the safety of engineering structures, but there is little research on the construction monitoring of arc-shaped prestressed concrete box girders in the industry at present. In order to ensure the safety of the construction process, a special monitoring scheme was established for the special-shaped box girder members in the roof structure based on the engineering practice of a student activity center stadium, and the whole process of construction was followed up and monitored. The finite element analysis software Midas Gen is used to simulate the construction process of the "butterfly" roof structure of the stadium. According to the actual construction steps, the stress and displacement variation process of the box girder, the key component of the roof, is analyzed by using the element birth and death technique. The actual monitoring data are compared with the numerical simulation results. The research shows that the actual monitoring results are in good agreement with the simulation results, which proves the feasibility of the construction simulation method, and the stress and displacement of the box girder in the construction process are within the controllable range to meet the requirements of construction acceptance. This work and research results have important reference value for the design and construction of similar large special-shaped members in building engineering.
【作者单位】：湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51278187) 国家火炬计划项目(2013GH561393)~~
【分类号】：TU757

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