不同强度等级建材在钢筋混凝土结构设计中的能耗及碳排放分析

Energy consumption and carbon emission of building materials with different strength grades in the design of reinforced concrete structures

以一个简单的三层钢筋混凝土学校结构为例,分别采用了两组强度等级的建材(即HRB335钢筋+C40混凝土与HRB400钢筋+C50混凝土),对比这两组建材在结构设计和整栋建筑碳排放量上的差异。结果表明,采用高强度等级的建材可以使整栋建筑钢筋和混凝土重量减少28.6%,体积减少14.8%,碳排放量减少18.9%,达到进一步节能减排的目的。

This article conducts two analysis(Scheme A and Scheme B)of a reinforced concrete(RC)school building with two types of steel and concrete in different strength grades.Scheme A employs HRB335 steel and C40 concrete,and scheme B employs HRB400 steel and C50 concrete.The quantities of steel and concrete in the beams,columns and foundations in the structure are calculated according to the design codes.The result shows that steel and concrete in scheme B is reduced by 28.6%in weight and 14.8%in volume than those in scheme A.Furthermore,the embedded energy and carbon dioxide emission generated in producing materials are also computed,which shows 22.1%and 18.9%reduction in scheme B in comparison with those in scheme A.