Author(s)

Si Daolin

Corresponding Author

Si Daolin

ABSTRACT

Underpinning is a key link in the building moving technology, and the different roller arrangement of underpinning beam directly impacts on the stability and the security of moving process of building. Through the experiment of the wrap-underpinning joints under frame columns, the relationship is studied between the fracture morphology of the underpinning joints and the different roller arrangement of underpinning beam, and also the influence is determined by the different roller arrangement of underpinning beam on the force mechanism and failure forms. The results show that the crack load was influenced hardly by the roller arrangement, neither inside arrangement nor full arrangement, but the ultimate bearing capacity was increased approximately by 30% and 1 times separately. When the roller inside arrangement, the failure form of underpinning joint is flexural failure of the underpinning beam, and full arrangement, failure mode of bonding interface between underpinning-beam and column was relative slippage.

KEYWORDS

Structural engineering, underpinning joints, roller arrangement, failure forms