Experimental and numerical investigation of double‐embedded blind‐bolted concrete‐filled steel tube connections subjected to cyclic tension load

Concrete‐filled steel tubular (CFST) columns with limited accessibility require the use of blind‐bolted connections in beam‐to‐column joints. This study investigates the tensile behavior of single anchored blind‐bolted connections in the tension zone of a composite truss joint. The literature examines the effects of bolt type, embedment length, and tube size. However, they are limited to an effective embedment length of 60 mm. This study extends the investigation to embedment lengths of 70, 80, and 90 mm. A washer tube is introduced to improve the anchorage mechanism. Pull‐out tests are conducted to evaluate the tensile performance of the connections. The results show that the tensile capacity is strongly influenced by the effective embedment length. A finite element model is developed in ABAQUS to simulate experimental behavior. The numerical results show good agreement with the experimental data. A comparison with published studies further validates the proposed model. The findings improve the understanding of the tensile behavior of blind‐bolted connections to CFST columns and provide useful information for the design of blind‐bolted composite joints.