Abstract
This paper presents an experimental research on bearing-type bolted connections consisting of two bolts positioned perpendicular to the loading direction. A total of 24 connections in double shear fabricated from high strength steels with yield stresses of 677MPa and 825MPa are tested. Two failure modes as tearout failure and splitting failure are observed in experiments. The effect of end distance, edge distance, bolt spacing and steel grade on the failure mode and bearing behavior are discussed. For connection design with bolts positioned perpendicular to loading direction, it is further found that combination of edge distance and bolt spacing effectively determines the failure mode and ultimate load. The test results are compared with Eurocode3. An optimal combination of edge distance and bolt spacing as well as related design suggestion is thus recommended.
Highlights
Bearing-type bolted connection is a widely used connection type in design of steel structures
This paper further provides an experimental analysis on 24 groups of connections with two bolts positioned perpendicular to loading direction
An experimental and numerical study on twobolt connections perpendicular to loading direction made from two grades of high strength steel (Q550D and Q690D) are conducted
Summary
Bearing-type bolted connection is a widely used connection type in design of steel structures. The resistance of connection is provided by the bearing between bolt and plate. Experiment on single-bolt connection has been a popular method to test the bearing resistance of an individual bolt [2,3,4]. The connection with two bolts positioned perpendicular to the loading direction is a basic form of multi-bolt connection. Study on this type of two-bolt connection can effectively test the bearing behavior of an individual bolt affected by another bolt positioned perpendicular to loading direction. The connection with two bolts positioned perpendicular to loading direction will be mainly discussed in this paper. This paper further provides an experimental analysis on 24 groups of connections with two bolts positioned perpendicular to loading direction. Two types of high strength steels with yield stress of 677MPa and 825MPa are used, which supplements the data set for two-bolt connections made from high strength steels
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