Interaction between Precast Concrete Columns with Socket Foundations Using Different Bonding Interfaces

In this study, a novel test technique is used to experimentally study the behavior and performance of the socket joint used to stabilize the precast columns embedded in a foundation that is subject to lateral loading. The test program included the testing of five test specimens, which represent the condition of the prefabricated concrete columns, which are embedded in the foundation. five specimens were divided into two groups based on the embedded length. Group one consists of two samples with a smooth interface and different embedded lengths. Group two consists of three samples with constant embedding length, two of them with a smooth interface and the other with a rough interface. Self-compacting mortar (SCM) was used as the adhesive material to fill the gap between the concrete column and the base for the samples of the first group, while the non-shrinking mortar and the self-compacting mortar (SCM) were used as adhesive material. Fill the gap between the Concrete column and the base in the second group. The practical results showed the possibility to use the developed test method as an alternative test method for comparing and representing a relationship between the different cases of socket connections. It has also been found that the roughness of the interface increases the bearing capacity for the embedded length, which corresponds to and is less than the depth of the concrete column, otherwise it is not required.