- 學位論文
波形鋼腹板預力箱型梁之實驗成果探討
Study on Experimental Results of Prestressed Box Girder with Corrugated Steel Web
摘要
波形鋼腹板複合橋係利用波形鋼腹板取代傳統預力混凝土梁之混凝土腹板，可使上部結構輕量化，並進而降低傳遞至下部結構之地震力，降低橋柱地震力需求，對於大跨徑跨河橋，此類橋型具有相當之優勢。 波形鋼腹板預力箱型梁複合橋除了具備自重輕之特點外，波形鋼腹板的垂直穩定性佳，具高剪力挫屈強度，且波形鋼腹板具有容許沿橋軸向大變形的特性，使得外加預力更為容易有效導入混凝土中。近年來因外置預力及高強度混凝土技術愈趨成熟，波形鋼腹板橋在世界各國之實際應用大幅增加。目前國內也已完成首座波形鋼腹板預力箱型梁複合橋之設計與施工，且該橋主梁為三箱室，算是此類橋型之首創。 為更進一步瞭解此類橋型之實際結構力學行為，配合國家地震工程研究中心進行波形鋼腹板預力箱型梁之相關性能實驗。並利用有限元素分析軟體ANSYS模擬波形鋼腹板箱型梁，於分析模式中同時考慮幾何非線性及材料非線性以便提高分析模擬之精確性，所得之分析結果與試驗分析成果比對，藉以探討波形鋼腹板之結構特性。
並列摘要
Prestressed girder with corrugated steel web is a new type of structure. In which, the corrugated steel web is employed to substitute web of the traditional concrete box girder. Therefore, it can reduce the use of concrete as well as self-weight effectively, and increase shear strength of the web. The use of corrugated steel web has many advantages such as light girder, economy cost, artistic appearance, high shear strength and rapid construction. The application of it to practical bridge engineering becomes popular in last decade, the study on its structure behavior is thus important. In Taiwan, the construction of the pre-stressed box girder with corrugated steel web has three chambers in main beam had already finished. As well known that the mechanics of this kind of composite box girder was complex. In order to investigate more detailed behaviors of it and ensure the safety of the designs, sets of experiments including bridge’s stabilization, the strength of the connection between the steel web and concrete flange as well as the experiment of the distorted model of bridge had performed at NCREE. In this thesis the main goal is to construct the analytical models considered the effect of geometric and material nonlinear for simulation and analysis by using the FEM software, ANASYS. The FEM’s analytical results seem well consistent with the experimental measurements and theoretical solutions by comparison. And the 3D FEM analysis models are useful to predict the structural behavior of the box girder with steel web. Nevertheless, even though the 3D FEM analysis is a powerful tool for analysis with accuracy, it might not employ with ease by engineers and cost time during the analysis procedure actually. Therefore, to benefit the engineers in design and analysis of which, the establishment of a simplified model or method is still a room in the future study.
參考文獻
延伸閱讀
- 陳律安、吳安傑、陳雋、蔡克銓（2022）。變斷面桁架圍束式挫屈束制支撐設計分析與試驗研究。結構工程，37(3)，27-47。https://doi.org/10.6849/SE.202209_37(3).0002
- 陳律安（2021）。變斷面桁架圍束式挫屈束制支撐設計分析與試驗研究〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU202102617
- 吳思誼（2005）。新式滾動隔震支承應用於縮尺橋梁振動台試驗研究〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2005.01710
- 徐誌隆（2008）。Study on Structure Behavior of Prestressed Girder with Corrugated Steel Web〔碩士論文，國立臺北科技大學〕。華藝線上圖書館。https://doi.org/10.6841/NTUT.2008.00046
- Wong, K. C. (1960). Experimental investigation on the web stability of plate girders [master's thesis, The University of Hong Kong]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0029-1812201200008889