Comparative Performance of Precast Column-To-Foundation Connections: A Review

PROPIKA, JAKA and Pudjisuryadi, Pamuda and Chandra, Jimmy (2024) Comparative Performance of Precast Column-To-Foundation Connections: A Review. In: The 1st International Conference on Civil, Architecture, Environmental Engineering and Technology, 29-09-2024 - 29-09-2024, Surabaya - Indonesia.

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Abstract

ince the introduction of precast concrete as a structural element in the early 20th century, precast concrete has evolved significantly into an essential construction technology in various modern construction projects. This is due to several advantages of precast concrete, such as time efficiency, relatively lower costs, good quality control, and environmental friendliness. However, precast concrete also has disadvantages when applied as part of a seismic-resistant building framework, primarily in the connection between elements, which does not perform as well as monolithic joints in terms of structural performance. The precast column-to-foundation connection is one of the most critical connections, as it experiences the largest axial-moment combination forces in a structure. Commonly used types of precast connections include pocket connections, baseplates, anchor connections, and grouting sleeves. The results of previous research reviews suggest that pocket connections demonstrate reliable structural performance, provided the column’s embedment length into the foundation exceeds 1.0 Diameter. Meanwhile, the structural performance of baseplate and anchor connections is significantly influenced by the thickness of the baseplate, the number of anchors, and their configuration. For grouting sleeve connections, the key factors are the diameter and spacing of the sleeves, as well as the length of the reinforcement bars. On average, test results for precast column-to-foundation connections indicate that all the connections above can achieve the strength of monolithic joints. However, structural performance characteristics such as ductility, energy dissipation, and stiffness degradation require further modifications to match the performance of cast-in-place monolithic joints.

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