Joints in Large Panel Precast Concrete Structures.

摘要

Large panel structures can be desirable from an economic viewpoint;however,the presence of joints may be a reason for concern in seismic regions or progressive collapse situations. Since the floor and wall assemblies in large panel buildings are expected to act as diaphragms and shear walls in lateral load resistance,there is a need to understand joint behavior and the influence of joints on overall structural response. In this report,the forces which various loading conditions require joints to transfer and the means by which they may do so (transfer mechanisms) are investigated. Some typical joint types (including plain and reinforced concrete,post-tensioned,welded and bolted) have been identified. These may be categorized on the basis of location (horizontal or vertical) or construction (wet,semi-wet or dry). Available information on the behavior of various joint types has been studied,and,based on this,the potential behavior of joints under ultimate loads,including reversals,and their possible influences on structural performance are discussed.