中文摘要：

提出新型截面（正向和斜向布置扩大十字型钢）型钢混凝土（SRC）柱-I字型钢SRC梁节点的构造措施。通过4个新型截面SRC柱-I字型钢SRC梁节点试件与1个普通SRC梁柱节点试件的低周反复荷载试验,研究试件的破坏特征和节点区剪力-剪切角关系,分析配钢形式、加载角度和构造措施对节点剪切变形的影响,并进一步提出实腹式SRC梁柱节点的受剪机理,结果表明,新型截面SRC梁柱节点发生核心区剪切破坏,其受力机理为斜压杆、刚框架-钢板剪力墙和约束机理的综合作用。通过对数值模拟数据的回归分析,采用叠加方法,提出考虑型钢腹板、箍筋和轴压比的新型截面SRC梁柱节点抗剪承载力计算公式,计算值与试验结果吻合较好。

英文摘要：

Joint details of new-type steel reinforced concrete （SRC） columns with enlarging and diagonal cross- shaped steel and SRC beams with I-shaped steel were presented. The shear patterns and shear force-shear angle re- lationship of beam-column joints were researched by tests of four new-type and one ordinary specimens under low cycle reversed loading. Effects of steel shape, load angel and structural measures on shear deformation of joints were analyzed, and the shear mechanism of solid-web SRC beam-column joints was proposed. The results show that the typical shear failure is occurred for SRC joints with new-type section steel, and the shear mechanism is the com- bination of strut-tie mechanism, rigid frame-steel shear wall mechanism and restriction mechanism. Through regres- sion analysis of the numerical simulation data, the calculation formulas for shear capacity of joint core region con- sidering the steel web, stirrup and axial compression ratio were suggested by using strength superposition method, and the calculation results agree well with the test data.