轴心受压构件正截面加固计算方法探讨  

DISCUSSION ON COMPUTATIONAL NORMAL SECTION STRENGTHENING OF AXIAL COMPRESSION MEMBERS

作　　者：肖良锦[1] 肖慧菲[1] 高朋朋[1] 

机构地区：[1]贵州大学土木建筑工程学院,贵阳550003

出　　处：《工业建筑》2009年第S1期1070-1072,共3页Industrial Construction

摘　　要：柱作为永久承受竖向荷载的主要结构构件,往往是结构加固的重点。利用E.Hognestad[1]提出的混凝土应力应变模型,推导建立轴心受压构件加固承载力计算公式,引进新增混凝土与钢筋强度利用系数cα、sα与原柱混凝土应力指标β的概念。从理论上分析原结构应力水平对cα、sα的影响,并根据这个结论提出采用增大截面加固钢筋混凝土轴心受压构件时新结构承载力的计算方法。As the main structure component bearing the load,the column sometimes is the priority of a structural reinforcement.Using concrete stress-strain model brought forward by E.Hognestad,deduced the reinforcing bearing capacity computational formula of axial compression members is deduced.Introducing the concept of α_c and α_s for the added concrete and strength of the reinforced steel bar,as well as the newly making use of modulus α_c,α_s and plain post concrete stress index β of original column,it is analyzed the impact of the original structure stress level on α_c and α_s theoretically,from which the computational method of the new structure′s bearing capacity is proposed when strengthening axial compression members.

关 键 词：结构承载力 混凝土柱加固 

分 类 号：TU375[建筑科学—结构工程]