摘要
在大量现有钢筋混凝土框架结构中,由于设计不当或施工事故,框架节点的强度和构造均不能满足现行抗震设计规范的要求,需进行加固。通过对节点核心区配筋不足、强梁弱柱、强柱弱梁,弱弯弱剪、梁纵筋锚固不足等7个足尺粘钢加固钢筋混凝土框架中节点,在低周反复荷载作用下的伪静力对比性试验,探讨了节点应力由梁传至柱的机理,提出了粘钢加固后节点的抗裂计算方法。
In many reinforced concrete frame structures,because of design unavailable or constructional accidents,the strength and the construction of the joints can't accord with the current aseismic code,which should be strengthened. The project team has carried out comparative pseudo-static test under low cycle reversed loading on seven different specimens of R C frame joints strengthened with adhering steel sheets which are joints core zone with low reinforcement ratio,strong beam and weak column,stong column and weak beam,weak bending and shear beam, beam with insufficiently anchored longitudinal bars,etc. Based on the test,the mechanism of stress transfer from the beam to the column through the joint was discussed.The method for calculating crack resistance of the strengthened joint is proposed.
出处
《青岛大学学报（工程技术版）》
CAS
2003年第4期41-46,共6页
Journal of Qingdao University(Engineering & Technology Edition)
