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（1 西南交通大學(xué)土木工程學(xué)院，成都 610031； 2 廣州大學(xué)土木工程學(xué)院，廣州 510006）

［摘要］中山異型拱橋是由兩條傾斜的鋼拱肋、橋面曲線鋼箱梁及傾斜的吊桿組成的多元空間體系，屬于特殊的空間鋼肋拱橋,受力復(fù)雜。為研究其力學(xué)行為，進(jìn)行了縮尺模型試驗。介紹了該橋模型試驗的目的、模型設(shè)計原則、測試工況、加載方案以及應(yīng)變和變形測點布置情況等，給出了幾個主要荷載工況下模型試驗的主要結(jié)果。同時利用ANSYS軟件建立空間有限元模型，對其靜力、動力性能進(jìn)行了理論分析。試驗數(shù)據(jù)與理論數(shù)據(jù)比較接近，證明該橋設(shè)計是合理、安全的。

［關(guān)鍵詞］異型拱橋；模型試驗；加載方案；測點布置；有限元模型

Mechanical property test and simulation analysis of special-shaped arch bridge

Lu Pengzhen 1, Zhang Junping 2, Zhao Renda1

 (1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China；

2 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:Zhongshan special-shaped arch bridge is composed of tow slope steel arch ribs, steel box girder of bridge deck curve and slope suspender. It belongs to the especial space steel rib arch bridge, and its mechanics property is complex. In order to study its mechanical behavior, scale model test is carried out. The testing purpose, model design principle, testing case, loading program, strain and arrangement of deformation test point of the special-shaped arch bridge test model are introduced in detail. Furthermore, the test data of main loading case is listed. The finite element model is established to analyze the static and dynamic performance using ANSYS software. By comparing  test data with the theoretical data, the two kinds of value are found quite agreeable, and it is proved that the bridge design is reasonable and safe.

Keywords:special-shaped arch bridge; model test; loading program; test point arrangement; finite element model  

*教育部優(yōu)秀青年教師基金項目（教人司［2000］11號）。