均布荷载作用下高强钢筋混凝土深梁受剪性能研究及有限元分析  

Research on shear behavior and finite element analysis of high-strength reinforced concrete deep beams under uniform loads

作　　者：解伟 司先洋 李树山 张光耀 韩云昭 曹夫利 XIE Wei;SI Xianyang;LI Shushan;ZHANG Guangyao;HAN Yunzhao;CAO Fuli(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450046,China)

机构地区：[1]华北水利水电大学水利学院,河南郑州450046 [2]华北水利水电大学土木与交通学院,河南郑州450046

出　　处：《混凝土》2022年第11期1-5,10,共6页Concrete

基　　金：国家自然科学基金项目(U1404526);河南省高等学校重点科研项目(21A560008)。

摘　　要：采用八点集中加载方式模拟均布荷载作用,完成7根高强钢筋混凝土深梁受剪性能试验。试验参数为纵筋配筋率、水平腹筋配筋率和竖向箍筋配筋率,分析这些参数对深梁受剪承载力的影响规律。在此试验基础上,建立ANSYS有限元模型,并采用GB 50010—2010《混凝土结构设计规范》中的计算式,对深梁受剪承载力进行计算,将有限元计算结果及规范计算结果与试验值进行对比分析。研究结果表明:均布荷载作用下的高强钢筋混凝土深梁,随着3种配筋率的增大,极限承载力显著提高;ANSYS计算结果接近试验值,有限元模型能够合理反映深梁构件的受剪机理;对于受均布荷载作用下的深梁,我国规范计算结果较为保守。The shear performance test of seven deep beams of high-strength reinforced concrete was completed by simulating the effect of uniform load with eight points of concentrated loading.The test parameters are longitudinal reinforcement rate,horizontal web reinforcement rate and vertical hoop reinforcement rate,and analyze the influence law of these parameters on the shear bearing capacity of deep beams.On the basis of this test,ANSYS finite element model is established,and the calculation formula in the Code for Design of Concrete Structures(GB50010—2010)is used to calculate the shear bearing capacity of deep beams,and the finite element calculation results and the code calculation results are compared and analyzed with the test values.The results show that the ultimate bearing capacity of high-strength reinforced concrete deep beam under uniform load increases significantly with the increase of three reinforcement ratios,the ANSYS calculation results are close to the test values,and the finite element model can reasonably reflect the shear mechanism of deep beam members.For the deep beam under uniform load,the calculation results of our code are more conservative.

关 键 词：高强混凝土 高强钢筋 深梁 均布荷载 配筋率 ANSYS有限元分析 

分 类 号：TU528.0571[建筑科学—建筑技术科学]