气膜薄壳钢筋混凝土结构动力特性测试与有限元分析研究
发布时间：2019-03-22 12:29
【摘要】：随着国家土木工程技术的快速发展,气膜薄壳钢筋混凝土结构以其独有的特点应用到实际生产生活中。这些重要基础设施是人们的日常生活和国家经济建设的结构工程,人们所关注的焦点是它的耐久性和它的安全性及正常使用的问题。因此,对气膜薄壳钢筋混凝土结构进行动力特性研究成为结构安全可靠领域的重点。本文针对气膜薄壳钢筋混凝土结构,采用现场原位测试和有限元分析的方法,分析了结构的动力特性。以实际工程为研究对象,基于环境激励布置水平、竖直方向加速度传感器和速度传感器,在频域范围评估了结构动力特性。基于有限元分析软件ANSYS建立结构三维有限元模型,并对结构进行模态分析,并将前3阶模态参数与实测结果进行了对比分析,研究结果表明:本次现场测试方法适用于气膜薄壳钢筋混凝土结构;两种测试分析系统在气膜薄壳钢筋混凝土结构的初阶动力特性识别有较高的精度,且识别结果差别很小,可认为其识别结果是一致的,起到了互验作用;ANSYS有限元软件在确定气膜薄壳钢筋混凝土结构初阶振型上具有较高的精度。从整体上看,气膜钢筋混凝土结构的刚度和抗震性能良好。最后对结构的使用状况进行评估,为设计人员对气膜薄壳钢筋混凝土结构的设计提供了参考,给管理者提供了结构维护管理的重点,并为以后的设计和建造提供了参考依据。
[Abstract]:With the rapid development of civil engineering technology in China, thin-shell reinforced concrete structure with gas film has been applied to practical production and life because of its unique characteristics. These important infrastructure are the structural engineering of people's daily life and national economic construction. People pay more attention to its durability, safety and normal use. Therefore, the research on dynamic characteristics of thin-shell reinforced concrete structure with gas film becomes the focal point in the field of structural safety and reliability. In this paper, the dynamic characteristics of thin air-film reinforced concrete structure are analyzed by in-situ test and finite element analysis. Based on the level of environmental excitation arrangement, vertical acceleration sensor and velocity sensor, the dynamic characteristics of the structure are evaluated in the frequency domain. Based on the finite element analysis software ANSYS, the three-dimensional finite element model of the structure is established, and the modal analysis of the structure is carried out. The first three-order modal parameters are compared with the measured results. The results show that the method is suitable for gas film thin shell reinforced concrete structure. The two test and analysis systems have high accuracy in identifying the initial dynamic characteristics of thin-shell reinforced concrete structures with gas film, and the difference between the identification results is very small. It can be considered that the identification results are consistent and play an interactive role. The ANSYS finite element software has high accuracy in determining the initial vibration modes of thin air-film reinforced concrete structures. As a whole, the stiffness and seismic performance of the air-film reinforced concrete structure are good. Finally, the application status of the structure is evaluated, which provides a reference for designers to design the thin-shell reinforced concrete structure with gas film, provides the emphasis of structure maintenance and management for the manager, and provides a reference basis for the design and construction of the structure in the future.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
本文编号：2445589
[Abstract]:With the rapid development of civil engineering technology in China, thin-shell reinforced concrete structure with gas film has been applied to practical production and life because of its unique characteristics. These important infrastructure are the structural engineering of people's daily life and national economic construction. People pay more attention to its durability, safety and normal use. Therefore, the research on dynamic characteristics of thin-shell reinforced concrete structure with gas film becomes the focal point in the field of structural safety and reliability. In this paper, the dynamic characteristics of thin air-film reinforced concrete structure are analyzed by in-situ test and finite element analysis. Based on the level of environmental excitation arrangement, vertical acceleration sensor and velocity sensor, the dynamic characteristics of the structure are evaluated in the frequency domain. Based on the finite element analysis software ANSYS, the three-dimensional finite element model of the structure is established, and the modal analysis of the structure is carried out. The first three-order modal parameters are compared with the measured results. The results show that the method is suitable for gas film thin shell reinforced concrete structure. The two test and analysis systems have high accuracy in identifying the initial dynamic characteristics of thin-shell reinforced concrete structures with gas film, and the difference between the identification results is very small. It can be considered that the identification results are consistent and play an interactive role. The ANSYS finite element software has high accuracy in determining the initial vibration modes of thin air-film reinforced concrete structures. As a whole, the stiffness and seismic performance of the air-film reinforced concrete structure are good. Finally, the application status of the structure is evaluated, which provides a reference for designers to design the thin-shell reinforced concrete structure with gas film, provides the emphasis of structure maintenance and management for the manager, and provides a reference basis for the design and construction of the structure in the future.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
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