【摘要】：隨著國家土木工程技術的快速發(fā)展,氣膜薄殼鋼筋混凝土結構以其獨有的特點應用到實際生產生活中。這些重要基礎設施是人們的日常生活和國家經濟建設的結構工程,人們所關注的焦點是它的耐久性和它的安全性及正常使用的問題。因此,對氣膜薄殼鋼筋混凝土結構進行動力特性研究成為結構安全可靠領域的重點。本文針對氣膜薄殼鋼筋混凝土結構,采用現場原位測試和有限元分析的方法,分析了結構的動力特性。以實際工程為研究對象,基于環(huán)境激勵布置水平、豎直方向加速度傳感器和速度傳感器,在頻域范圍評估了結構動力特性�；谟邢拊治鲕浖嗀NSYS建立結構三維有限元模型,并對結構進行模態(tài)分析,并將前3階模態(tài)參數與實測結果進行了對比分析,研究結果表明:本次現場測試方法適用于氣膜薄殼鋼筋混凝土結構;兩種測試分析系統在氣膜薄殼鋼筋混凝土結構的初階動力特性識別有較高的精度,且識別結果差別很小,可認為其識別結果是一致的,起到了互驗作用;ANSYS有限元軟件在確定氣膜薄殼鋼筋混凝土結構初階振型上具有較高的精度。從整體上看,氣膜鋼筋混凝土結構的剛度和抗震性能良好。最后對結構的使用狀況進行評估,為設計人員對氣膜薄殼鋼筋混凝土結構的設計提供了參考,給管理者提供了結構維護管理的重點,并為以后的設計和建造提供了參考依據。
[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.
【學位授予單位】：河北工程大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU398.9

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