BFRP筋再生混凝土无腹筋梁开裂荷载试验研究  

Experimental study on cracking behavior of BFRP reinforced recycled concrete beams without stirrups

作　　者：彭长岭 刘华新[1] Peng Changling, Liu Huaxin(School of Civil Engineering and Architecture, Liaoning University of Technology, Jinzhou 121001, China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《山西建筑》2018年第26期30-33,共4页Shanxi Architecture

基　　金：辽宁省自然科学基金(2015020208)

摘　　要：通过对9根BFRP筋再生混凝土无腹筋梁的抗剪性能试验,研究了BFRP筋配筋率、剪跨比、截面高度和混凝土抗压强度对开裂荷载的影响。试验表明:BFRP筋再生混凝土梁的开裂荷载随着剪跨比的增大而逐渐减小;一定范围内,提高再生混凝土抗压强度、BFRP筋配筋率和截面高度能增大试验梁的开裂荷载。将试验梁的开裂荷载试验值与三种不同开裂荷载计算方法得到的理论值进行比较分析,得出当前的开裂荷载计算方法已经不再适合BFRP筋再生混凝土无腹筋梁开裂荷载的计算。Study on the influence of reinforcement ratio,shear span ratio,depth of section and concrete compressive strength on cracking load by the shear performance expermance experimental study of 9 BFRP reinforced recycled concrete beams without stirrups. The test results show that the cracking load of BFRP reinforced recycled concrete beams decreases with the increase of shear span ratio,and with increasing the compressive strength of recycled concrete,the reinforcement ratio of BFRP bars and depth of section,the cracking load of test beams can be increased in a certain range. By comparing the cracking load test results with the theoretical values obtained by three different cracking load calculation methods,it is shown that the current cracking load calculation method is no longer suitable for the cracking load calculation of BFRP reinforced recycled concrete beams without web reinforcement.

关 键 词：BFRP筋 无腹筋梁 再生混凝土 开裂荷载 

分 类 号：TU317[建筑科学—结构工程]