既有房屋的套建增层改造已成为土木工程界关注的一个热点问题。
Using out-jacketing structure for storey-adding has become one of the most concerned topics in the circles of civil engineering.
内置H型钢混凝土组合结构是实现套建增层的结构设计形式之一。
Prestressed composite concrete beam with encased H-steel is one of the structural design forms for the outer-jacketing structure for adding story.
虽然目前开展了一定数量的套建增层工程实践，但有关套建增层框架设计方法的研究较少。
Although a number of projects outer-jacketing frame for storey-adding have been accomplished presently, there is little research on design methods for this kind of frame.
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