半轻钢筋混凝土局部无黏结构件力学性能试验研究  

Experimental study on mechanical properties of partiallyunbonded members of semi-light reinforced concrete

作　　者：张水仙 周婉 ZHANG Shui-xian;ZHOU Wan(School of Architecture and Engineering,Zhengzhou University of Industrial Technology,Zhengzhou 450000,China)

机构地区：[1]郑州工业应用技术学院建筑工程学院,河南郑州450000

出　　处：《河南城建学院学报》2025年第2期57-63,共7页Journal of Henan University of Urban Construction

摘　　要：为研究半轻钢筋混凝土局部无黏结构件的力学性能及其在结构体系中的应用,使用石轻混凝土(GLWC)、混轻混凝土(HALWC)和少陶粒混凝土(HACC)等3种半轻混凝土,制备9组半轻钢筋混凝土局部无黏结柱构件进行单调加载试验,分析不同未黏结率对半轻钢筋混凝土构件的破坏形态、轴向变形、开裂荷载、黏结滑移本构关系以及承载力的影响。结果表明:半轻钢筋混凝土局部无黏结构件与普通钢筋混凝土构件的破坏形式基本一致,但最终的破坏状态不同;随着未黏结率的增加,构件的裂缝宽度增加、轴向位移增大、极限承载力降低;构件钢筋与混凝土之间的滑移值随荷载、与跨中截面的距离以及未黏结率等的增大而增加。To investigate the mechanical performance of partially unbonded members of semi-light reinforced concrete and their application in structural systems,nine groups of partially unbonded column members of semi-light reinforced concrete were prepared by using three kinds of semi-light concrete,including gravel lightweight concrete(GLWC),hybrid aggregates lightweight concrete(HALWC)and hybrid aggregates concrete with less ceramsite(HACC),and monotonic loading tests were carried out.The study analyzed the effects of different unbonded ratios on the failure modes,axial deformation,cracking load,bond-slip constitutive relationships,and load-bearing capacity of the members.The results show that the failure modes of partially unbonded members of semi-light reinforced concrete are essentially similar to those of normal-weight concrete members,but the final failure state is different;under the same conditions,as the unbonded ratio increases,crack width increases,axial displacement increases,ultimate bearing capacity decreases;the slip value between reinforcement and concrete increases with the increase of load,the increase of distance from the mid-span section,and the increase of unbonded ratio.

关 键 词：半轻混凝土 钢筋混凝土柱 未黏结率 黏结滑移 

分 类 号：TU528.2[建筑科学—建筑技术科学]