预应力包钢法加固框架梁柱节点的试验研究  

Experimental Research on the Core of Beam-Column Joints Strengthened by Profile Steel and Prestressed Bolts

作　　者：徐福泉[1] 刘敏[2] 关建光[1] 

机构地区：[1]中国建筑科学研究院建筑结构研究所,北京100013 [2]核工业第二研究设计院,北京100840

出　　处：《建筑科学》2007年第11期29-34,共6页Building Science

摘　　要：预应力包钢加固法是在混凝土构件四周包以型钢,采用高强螺栓对外包钢施加双向水平预应力的一种先进的加固新技术。本文主要介绍了四个梁柱节点试件在周期反复荷载作用下的试验,试验结果表明:采用预应力包钢法加固梁柱节点,可有效提高其开裂荷载、受剪承载力和延性;加固螺栓箍可以有效参与工作,没有应力滞后现象。在此基础之上,本文提出了预应力包钢法加固框架梁柱节点受剪承载力计算公式以及相关的设计建议,为工程实践提供依据。The strengthened method using profile steel and prestressed bolts refers to a new advanced strengthening way in which the concrete beam-column joint is strengthened around its section by bonding profile steel and prestress is applied by high-tensile bolts. The experiment of four beam-column joints under reversed cyclic loading is mainly introduced. The test results show that the crack resistance, shear capacity and ductility of the strengthened beam-column joints are increased effectively. The prestressed bolts can be brought into full play effectively. Based on those, the formula for calculating shear capacity of the beam-column joints strengthened by the new method and related design suggestions are proposed, which can provide scientific basis for engineering practice.

关 键 词：螺栓 加固 节点 节点核心区 开裂荷载 受剪承载力 变形 延性 

分 类 号：TU375[建筑科学—结构工程] TU317.1