摘要
Abstract
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 light-weight 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 relation-ships,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 reinforce-ment 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Key words
semi-lightweight concrete/reinforced concrete column/unbonded ratio/bond slip分类
土木建筑
