Anchorage performance of embedments in anchored prefabricated wall–beam joints of BLC–CCWS

Abstract

The existing wall–beam joints of bundled lipped channel–concrete composite wall structures (BLC–CCWS) are mainly fabricated by welding thin–walled steel tubes and hot–rolled steel plates, and this application requires further improvement. An innovative anchored prefabricated wall–beam joint that does not require field welding was presented in this paper, and the anchorage performance of the embedment, which is the key force transfer component of the joint, was investigated by experimental research and theoretical analysis. The results indicated that (1) the embedments have good anchorage performance in the “bundled lipped channel–concrete” anchorage area, especially the “steel–stud–anchor plate” type of embedment, which clearly demonstrates a mechanical property evolution stage. (2) Embedment construction has a great influence on the anchorage performance. The ultimate bearing capacity, ultimate slip, ductility and energy storage/dissipation capacity of the “steel–stud–anchor plate” embedment are better than those of the “steel–stud” embedment. (3) The construction of the anchorage area has a great influence on the anchorage performance. The bundled lipped channel can substantially limit the range of damage to concrete. In addition, the anchorage performance of the embedment in the “bundled lipped channel–concrete” anchorage area is better than that of the “circumferential steel plate–concrete” anchorage area in terms of the ultimate bearing capacity, ultimate slip, ductility and energy dissipation capacity. (4) The established formula for calculating the anchorage bearing capacity of the embedment is accurate and conservative, and thus can meet the requirements of engineering practice.