The utilization of semi-rigidly connected T-nodes in architectural engineering projects within smart cities presents advantages such as improved fatigue life of the structure, enhanced adaptability to the long-term development needs of the urban environment, and increased flexibility and construction convenience for smart city development. Additionally, this discussion delves into the application and arrangement of smart sensors on T-nodes, along with the implementation of a stress-strain cloud monitoring system for T-nodes. To comprehensively understand the impact of T-node flange plate thickness and bolt preload on the internal force of T-node bolts, a series of tensile tests and finite element simulation analyses are conducted on the T-node. These analyses aim to derive the load-strain curve of the T-node, providing valuable insights into the influence laws associated with these design parameters.