- 摘 要
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（1江蘇科技大學(xué)土建學(xué)院， 鎮(zhèn)江 212003； 2 同濟(jì)大學(xué)土木工程學(xué)院， 上海 200092；3昆山市建設(shè)工程質(zhì)量檢測中心， 昆山 215337； 4 江蘇工程職業(yè)技術(shù)學(xué)院， 南通 226000）
［摘要］基于全局布索預(yù)應(yīng)力鋼框架的結(jié)構(gòu)形式，設(shè)計(jì)兩榀縮尺模型進(jìn)行設(shè)計(jì)荷載條件下的靜力試驗(yàn)，以分析不同拉索截面面積、預(yù)拉力對鋼框架的影響。通過試驗(yàn)可知，隨著索支索預(yù)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(yù)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(yù)拉力在相同預(yù)應(yīng)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(guān)，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?cái)_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(yīng)的索截面面積可認(rèn)為是最經(jīng)濟(jì)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(guān)鍵詞］預(yù)應(yīng)力鋼框架； 索支索； 隅撐索； 參數(shù)分析； 試驗(yàn)研究
中圖分類號(hào)：TU394文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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(xué)校自然科學(xué)研究面上項(xiàng)目（18KJD580001）；江蘇工程職業(yè)技術(shù)學(xué)院自然科學(xué)研究基金項(xiàng)目（GYKY201711）；住建部科技計(jì)劃項(xiàng)目（2016-K5-049）。
通訊作者：唐柏鑒，博士，教授，江蘇省“青藍(lán)工程”學(xué)術(shù)帶頭人，Email:tangbaijian@163.com。
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