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一、梁柱节点的破坏形式本文所指的框架节点,主要为现浇框架梁柱节点。其范围包括:梁和柱相交的节点核心区以及邻近的柱端和梁端。国内外几次大地震的震害表明:钢筋混凝土框架节点都有不同程度的破坏,严重的会引起整个框架倒毁。节点破坏后的修复也比较困难。图1为几种典型破坏示意图。1.梁端受弯破坏表现为梁纵向受拉钢筋屈服,受压区混凝土压碎。梁端(靠近柱面处)形成塑性
I. Destruction form of beam-column nodes The frame nodes referred to in this paper are mainly cast-in-place frame beam-column nodes. Its scope includes: the core of the node where the beam intersects the column, and the adjacent column and beam ends. The earthquake damage of several large earthquakes at home and abroad shows that the reinforced concrete frame joints all have different degrees of damage, and the entire frame will be seriously damaged. Repair after node destruction is also difficult. Figure 1 shows several typical failures. 1. The bending failure of the beam end is represented by the yielding of the longitudinal tensile reinforcement of the beam and the compression of the concrete in the compression zone. Beam end (close to the cylinder) forming plasticity