地震作用部分转移法在中小学混凝土框架结构校舍加固中应用

Application of Partially-Transferred Seismic Action Method in Strengthening Concrete Frame Structures for Primary and Secondary School Buildings

目的探讨采用地震作用部分转移加固方法对不满足抗震要求的低层单跨的中小学混凝土框架结构校舍进行抗震加固的可行性,为这类特点的中小学校舍提供加固设计方法.方法结合工程实例提出了一种地震作用部分转移的加固方法,即在原框架结构中设置剪力墙,通过其吸引部分地震作用来降低对原框架结构的抗震能力要求.结果设置剪力墙后,结构X、Y向的变形均明显减小且基本相同,层间位移角也明显地减小,剪力墙可有效地分担原框架结构的部分地震作用,从而间接地提高了其抗震能力.结论地震作用部分转移加固方法具有施工方便、周期短和造价低廉的特点,避免了对原框架结构构件的逐一加固,应用实际工程是可行的.

This paper discussed the feasibility of partially-transferred seismic action strengthening method which was applied to the seismic strengthening of primary and secondary school buildings. A strengthening design method was provided for such characteristics frame structures school buildings with low-rise and sin- gle span,which can＇t meet the new seismic requirements. Through an actual project, this paper introduced a strengthening method called partially-transferred seismic action method. In this method, some shear walls were installed into the original frame structure to reduce the seismic capacity requirements for the original frame structure by partially attracting seismic action. After setting shear wall, the X, Y deformation of struc- ture were reduced significantly and basically the same, the interlayer displacement angle was also reduced obviously. Shear walls can bear part of seismic action from the original frame structure effectively, which can improve seismic capacity indirectly. In addition, the strengthening method was convenient for construction, ittook a shorter construction time and a lower cost, and it can be avoided that reinforcing the original flame structural members one by one. It is feasible in practical engineering application.