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对于受到地震那样大的外力作用时的钢筋混凝土构筑物,对其变形性能的评价,人们一直在广泛的范围内进行着试验研究。不少学者指出,主筋的被拔出对构筑物的抗震性能有着极大的影响,因而有必要深入这方面的研究。但钢筋的拔出是一个与混凝土和钢筋握裹表面的局部受力状态有关的问题,目前由于分析上的困难,所以不易解决。最近,有些学者进行了一系列的研究分析,试图通过求出钢筋与混凝土之间的附着应力-滑移关系来搞清这一问题,取得了一些成果。许多学者都一致认为:如果能够正确地求得埋入混凝土中的钢筋因受力而产生的应变分布规律,那么将这一应变分布沿
For reinforced concrete structures subjected to external forces as large as earthquakes, evaluations of their deformation properties have been conducted experimentally in a wide range. Many scholars have pointed out that the pulling out of the main tendons has a great influence on the seismic performance of the structures, so it is necessary to further study in this area. However, the pulling out of the steel bar is a problem related to the local stress state of the concrete and the steel bar grip surface. At present, due to the analysis difficulties, it is not easy to solve. Recently, some scholars have conducted a series of research and analysis, trying to find out the problem by obtaining the adhesion stress-slip relationship between reinforcing steel and concrete, and achieved some results. Many scholars agree that if we can correctly find the strain distribution of reinforcing steel embedded in concrete, then we will distribute this strain along