- 摘 要
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（1江蘇科技大學土建學院， 鎮(zhèn)江 212003； 2 同濟大學土木工程學院， 上海 200092；3昆山市建設工程質(zhì)量檢測中心， 昆山 215337； 4 江蘇工程職業(yè)技術學院， 南通 226000）
［摘要］基于全局布索預應力鋼框架的結構形式，設計兩榀縮尺模型進行設計荷載條件下的靜力試驗，以分析不同拉索截面面積、預拉力對鋼框架的影響。通過試驗可知，隨著索支索預拉力的增加，增大了索支撐桿對鋼框架的頂推力，隨著隅撐索預拉力的增加，增大了隅撐撐桿對鋼框架的拖曳力。不同索截面面積的拉索初始預拉力在相同預應力的情況下對鋼框架各截面產(chǎn)生的彎矩和擾度與其各自的索截面面積有關，且按其變化倍數(shù)增加。隨著兩索索截面面積的增加，在豎向荷載下使鋼框架各截面彎矩擾度的增長率不斷下降，且存在增長率下降幅度的峰值，其對應的索截面面積可認為是最經(jīng)濟的索截面面積，水平荷載下，索截面面積變化對鋼框架各截面彎矩變形的增長率影響較小。
［關鍵詞］預應力鋼框架； 索支索； 隅撐索； 參數(shù)分析； 試驗研究
中圖分類號：TU394文獻標識碼：A文章編號：1002-848X(2019)16-0078-07
Experimental study on prestress parameters of cable-supported and knee-braced steel frame
Guo Junyuan1,2, Tang Baijian1, Gu Sheng3, Zhang Taiyue4
（1 School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China； 2 College of Civil Engineering, Tongji University, Shanghai 200092, China； 3 Kunshan Construction Engineering Quality Testing Center, Kunshan 215337, China； 4 Jiangsu College of Engineering and Technology, Nantong 226000, China）
Abstract:Based on the structural form of cable-supported and knee-braced steel frame, two scaled models were designed for the static test under load conditions to analyze the impact of different cable cross-section areas and pre-tension force on steel frame. It is found in the experiment that the increase of pre-tension force on cable-supporting cable increases the pushing force of cable-supporting rod on steel frame, and the increase of pre-tension force on knee-bracing cable increases the drag force of knee-bracing rod on steel frame. The bending moments and deformations of the initial prestressing forces of cables with different cross-sectional areas are related to the respective cross-sectional areas of cables under the same prestressing conditions, and increase according to their change multiples. The increase of cross-sectional area of two cables makes the increase rate of moment deformation of each section of steel frame decrease continuously under vertical load, and there is a peak of the decrease rate. The corresponding cross-sectional area of cables can be considered as the most economical cross-sectional area of cables. Under horizontal load, the change of cross-sectional area of cables has little influence on the increase rate of moment deformation of each section of steel frame.
Keywords:prestressed steel frame; cable-supporting cable; knee-bracing cable; parametric analysis; experimental study
*江蘇省高等學校自然科學研究面上項目（18KJD580001）；江蘇工程職業(yè)技術學院自然科學研究基金項目（GYKY201711）；住建部科技計劃項目（2016-K5-049）。
通訊作者：唐柏鑒，博士，教授，江蘇省“青藍工程”學術帶頭人，Email:tangbaijian@163.com。
