Longitudinal-bar and I-steel-beam connection node and section-steel-beam-column connection structure

The invention relates to the field of building structures. A longitudinal-bar and I-steel-beam connection node and a section-steel-beam-column connection structure aim at solving the problems that inan existing punching-on-beam mode, the structural strength and the stability are influenced, the processing difficulty of a steel member is increased, and site construction is inconvenient. A plurality of upper sleeves are fixedly connected on the upper surface of an upper flange of an I steel steam, a plurality of lower sleeves are fixedly connected on the lower surface of a lower flange of the Isteel steam, and the upper sleeves are right opposite to the lower sleeves in the vertical direction; a longitudinal bar comprises upper longitudinal bar bodies and lower longitudinal bar bodies, thelower ends of the upper longitudinal bar bodies are fixedly connected to the upper sleeves and extend upwards in the vertical direction, and the upper ends of the lower longitudinal bar bodies are fixedly connected to the lowe