鋼筋套筒擠壓搭接連接預(yù)制空心樓板-疊合梁節(jié)點試驗
韓文龍1，趙作周1，錢稼茹1，尹鴻飛1，劉時偉2
- 摘 要
-
（1 清華大學(xué)土木工程安全與耐久教育部重點實驗室，北京 100084；2 內(nèi)蒙古蒙西工程設(shè)計有限公司，呼和浩特 010000）
［摘要］為研究受拉鋼筋套筒擠壓搭接連接的預(yù)制空心樓板-疊合梁連接節(jié)點在豎向荷載作用下的受力性能，進(jìn)行了2個筒芯內(nèi)模布設(shè)方向不同的預(yù)制空心樓板-疊合梁連接節(jié)點和1個現(xiàn)澆空心樓板-疊合梁連接節(jié)點的靜力試驗。結(jié)果表明：3個試件的裂縫分布相同、破壞形態(tài)相同，均為空心樓板受彎破壞；試件的試驗承載力與規(guī)范計算承載力的比值均大于1.05，可采用規(guī)范正截面受彎承載力公式計算預(yù)制空心樓板的受彎承載力；試件的名義屈服荷載、峰值荷載、峰值點割線剛度基本相同；預(yù)制空心樓板受拉鋼筋套筒擠壓搭接接頭可有效傳遞鋼筋拉力。［關(guān)鍵詞］預(yù)制空心樓板; 疊合梁; 板-梁節(jié)點; 鋼筋套筒擠壓搭接連接; 靜力試驗中圖分類號：TU375, TU317 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2016)10-0068-06
Experimental study on composite RC beam-slab joints of precast concrete hollow floor with rebars lapping in pressed sleeveHan Wenlong1, Zhao Zuozhou1, Qian Jiaru1, Yin Hongfei1, Liu Shiwei2(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 Inner Mongolia Mengxi Engineering Design Co., Ltd., Hohhot 010000, China)Abstract: To study the mechanical performance of composite RC beam-slab joints of precast concrete hollow floor with rebars lapping in pressed sleeve, static tests of two precast assembly composite RC beam-slab joints with tube fillers layed in different directions and one cast-in-place composite RC beam-slab joint were carried out. The test results indicate that all specimens fail in a flexural failure mode of the hollow slabs with similar crack distributions and failure patterns. The ratio of the measured bearing capacity to the calculated capacity following the formula in the current design code is greater than 1.05, so the code formula can be used to calculate the flexural capacity of the precast concrete hollow slab. The nominal yield load, the peak load and the secant stiffness at the peak load of all specimens match well. The lapping pressed sleeve splice can transfer the tensile force of the rebars in a precast concrete hollow slab effectively.Keywords: precast concrete hollow slab; composite RC beam; beam-slab joint; rebars lapping in pressed sleeve; static test
作者簡介：韓文龍，博士研究生，Email：hanwenlong9122@163.com。
