龙源期刊网 http://www.qikan.com.cn
关于混凝土局部受压研究与应用现状的探讨
作者:刘虹 秦云
来源:《中国建筑科学》2014年第02期
摘 要:混凝土局部受压在工程实践中是常见的,在国内外,关于该问题的研究起步较早,且主要依赖于一定条件下的、有限数量的试验结果,相关理论或推导引用了或多或少的假设,所得计算公式间存在一定的差距。本文系统总结了国内外学者对混凝土局部受压的研究成果及应用现状,并考虑工程实际,结合现行规范,对与局压相关的问题进行了探讨,所提出的相关意见和看法,可供局压研究和工程实践参考。
关键词:混凝土局部受压;研究与应用现状;局部受压提高系数
Discussion on the present situation of the research and application of local compression of concrete
Liu Hong,Qin Yun
(Yunnan University School of Urban Construction and Management, Kunming 650000) Abstract: It is popular in practice that the compression force is applied locally on concrete member. With the aid of experiment, studies on the local compression were performed by Domestic and foreign scholars earlier. There were remarkable differences among various formulas due to
limited experiments and their hypothesis. In this paper, the research results and application of local compression of concrete were summarized. According to the engineering practice and current
specification, some problems concerned are discussed. Here, relevant comments and views can be references for engineering practice and research in the future.
Keywords: concrete local compression; research and application; improve local compression factor 1.引言
混凝土局部受压即在混凝土构件的表面上只有部分面积承受压力的状态[1]。局部受压是钢筋混凝土结构中最常见的受力形式之一。19世纪80年代,国外便开始了对混凝土局部受压的研究,20世纪50年代—80年代,混凝土局部受压的研究进入了高峰期,研究主要集中于破坏形态、破坏机理、影响因素和强度理论四个方面, 期间的大部分成果得以延续至今;此后,对该课题的研究几乎停滞。由于受客观条件及计算机技术水平的限制,以往的研究方法仅限于试验和理论推导,试件为受压面没有坡度的长方体和圆柱体试件,对于构件内部的应力分布则根据基于一定基本假设的理论推导得到。
相关推荐: