高层建筑框架柱加固计算原理及实例

CALCULATION PRINCIPLES FOR REINFORCEMENTS OF HIGHRISE BUILDING' S FRAMED CONCRETE COLUMNS WITH A PRACTICAL EXAMPLE

当高层建筑中框架柱混凝土的强度等级达不到设计要求时，常采用柱外包混凝土加固的方法，但加固设计如果不合理，将造成较大浪费。在分析了新老两部分共同工作的条件并做了基本假定后，提出了加大截面法的计算原则，并推导了需增加截面积的计算公式。

When the strength grade of highrise building' s framed concrete columns can not meet the requirement of design,the strengthening method of a column externally covered with reinforced concrete has been generally adopted.But if the strengthening method was not apropriate,it would lead to considerable waste.After a detailed analysis of the new and old structures' coordinated actions and provided thereafter with the basic assumptions,it has put forward the calculation principle for increase of cross-section method,and derived the calculation formula for increase of cross-section.