基于试验数据的高强混凝土梁抗剪承载力计算方法Ⅰ.无腹筋梁  

Calculation Method of Shear Capacity of High Strength Concrete Beams Based on Experimental DataⅠ.Without Web Reinforcement

作　　者：黄靓[1] 郑钟国 鲁懿虬 李叶 包堂堂[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]奥克兰大学土木与环境工程系

出　　处：《建筑科学与工程学报》2017年第5期113-119,共7页Journal of Architecture and Civil Engineering

基　　金：国家重点研发计划资助项目(2017YFC0703000)

摘　　要：为了研究高强混凝土无腹筋梁抗剪承载力的计算方法,收集国内外关于高强混凝土无腹筋梁抗剪试验的抗剪承载力、混凝土强度、剪跨比、截面有效高度、受拉纵筋配筋率等试验数据,整理成包含291组数据的数据库。利用数据库中的实测数据对中国《混凝土结构设计规范》(GB 50010—2010)、美国混凝土结构设计规范ACI 318-14和Zsutty提出的混凝土梁抗剪承载力公式用于高强混凝土梁的适用性进行评价,并分情况进一步研究中国规范公式,修正中国规范公式中的参数,得到一个新的公式。结果表明:3个公式用于高强混凝土梁时,Zsutty公式的预测结果最精确,中国规范公式的预测结果准确性次于Zsutty公式但好于美国规范公式;所得出的新公式较原规范公式更加适用于高强混凝土无腹筋梁。In order to study the calculation method of shear capacity of high strength concrete without webs, the experimental data on the shear tests of high strength concrete beams without web reinforcement were collected, these data included shear capacity, concrete strength, shear span ratio, effective cross section, tensile longitudinal reinforcement ratio etc. A database of 291 experimental data was established. Three theoretical formulas of shear capacity of concrete beams were reviewed, the formula in Code for Design of Concrete Structures （GB 50010--2010） and the formula in ACI 318-14 and Zsutty equation. The applicability of these 3 formulas in the high strength concrete beams was evaluated by using the measured data in the database. The further study of the formula in GB 50010--2010 was done under different conditions. The parameters in the formula of GB 50010--2010 were revised based on the experimental comparison. The results show that the prediction results of the Zsutty equation are the most accurate, the accuracy of the formula in GB 50010--2010 is better than the formula in ACI 318-14, and the proposed formula is more suitable for the high strength concrete beams without web reinforcement.

关 键 词：高强混凝土 无腹筋梁 抗剪承载力 数据库 计算方法 

分 类 号：TU311[建筑科学—结构工程]