钢筋混凝土框架夹心节点受力性能与施工处理方法研究进展

Research on Mechanical Performance and Construction Method of Sandwich Joints of Reinforced Concrete Frame

节点核心区采用同梁等强的低强度混凝土浇筑的夹心节点和采用同柱等强的高强度混凝土浇筑的传统节点相比,施工简单且易保证质量,但是我国规范对其规定过于简单,没有明确的验算方法,对其深入研究已成为一种很迫切的工程需求。本文从钢筋混凝土框架夹心节点的受力性能、相关规范规定及加强措施与施工处理方法三个方面,对国内外研究工作及主要成果进行归纳总结,并在此基础上分析有待进一步研究的问题。指出,在不采取或采取一定的加强措施条件下,夹心节点有满足承载力和抗震性能要求的可能性,但是目前国内相关研究较少,对影响其性能的因素研究还不够系统,尚未取得公认的研究成果。因此,有必要对其受力性能与施工处理方法进行深入的理论和试验研究。

The sandwich joints casted core area with weaker strength concrete of beam have more advantages than the traditional joints casted core area with higher strength concrete of column,such as the simple construction and quality assurance,while China design codes are too simple about the sandwich joints that have no clear calculation methods. The present situation of research on behaviors and construction methods of sandwich joints of reinforced concrete frames is reviewed in aspects including behaviors,design codes of different country like Canada USA and China,construction methods,and the existing problems in present research are summarized.The analysis results show that the sandwich joints have possibility that could satisfy the requirement of bearing capacity and seismic performance,but the research is not enough in China. The factors affecting the performance need to be updated for more systematic research,and recognized research results have not yet been made. Therefore,further theoretical and experimental research are necessary on mechanical performance and construction methods of sandwich joints.