- 摘 要
-
（1揚州市市政設施管理處， 揚州 225000； 2 揚州大學建筑科學與工程學院, 揚州 225127)
［摘要］為研究混凝土-磚砌體組合托換梁的受剪性能，制作了2 種不同組合形式、3種不同連接筋間距共7根混凝土-磚砌體組合托換梁進行靜載試驗。試驗研究表明，組合托換梁構造可靠，混凝土梁與磚砌體可保持良好的整體性共同工作。根據桁架-拱模型，推導了混凝土-磚砌體組合托換梁的受剪承載能力計算公式?；诂F行規(guī)范的混凝土梁斜截面受剪承載力計算公式，提出了混凝土-磚砌體組合托換梁受剪承載力簡化計算公式。理論公式與簡化公式計算得到的結果與試驗實測值均吻合較好，且簡化公式計算簡單、方便，可適用于工程實踐。
［關鍵詞］混凝土梁； 磚砌體； 托換梁； 受剪性能； 試驗研究
中圖分類號：TU375-1文獻標識碼：A文章編號：1002-848X(2017)09-0059-06
Study on the shear behaviors of composite component of concrete-masonry underpinning beams
Jiang Xiaoqin1, Cao Dafu2, Ge Wenjie2, Wang Songrong2
(1 Yangzhou Municipal Facilities Management Office, Yangzhou 225000, China;
2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)
Abstract:In order to study the shear behaviors of composite component of concrete-masonry underpinning beams, seven composite components with two different combination forms and three different connect reinforcement spacing were made and the static shear experiment were carried out. The experimental results show that the construction of composite components is reliable, concrete beam and masonry beam can work together as an integrity component. Taking truss-arch model as reference, the shear capacity theoretical calculate formula of composite component was derived. According to reinforced concrete beams oblique plane shear capacity calculate formula of current design code for concrete structure, a simplified calculate formula of shear capacity of composite component was given. The results show that theoretical formula and simplified calculate formula were agree well with experimental value. The using of proposed simplified formula is very convenient, which could be used for engineering practice.
Keywords:concrete beam; masonry; underpinning beam; shear behavior; experimental study
*國家自然科學基金資助項目(51578478, 51278445)。
通訊作者：曹大富，碩士，教授，Email: dfcao@yzu.edu.cn。
