Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 95-97). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 98-100). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 81-82). Also available via the Internet.

No description available.

Thesis (M.S.)--University of Wyoming, 2008. / Title from PDF title page (viewed on Nov. 13, 2009). Includes bibliographical references (p. 47).

The strength and stiffness characteristics of longspan composite open-web steel joists are studied. Eight full scale single span composite joists were tested to failure to evaluate their performance in both the elastic and inelastic ranges. The test specimens' spans, depths, slab depth, and amount of shear connection was varied. Analytical methods are presented to predict both the ultimate strength and the stiffness of the composite joist. A non-linear finite element model is presented to predict the behavior of the composite joist in the elastic and inelastic regions. / Master of Science

Standards for stud strength in composite joists are presently not available. Existing standards for composite design are targeted for composite beam design while design of a composite joist requires more emphasis on stud strength to fully develop the joist bottom chord. Stud placement in the deck flute is investigated. Thirty-six push-off specimens were tested with three different deck geometries. A normal load apparatus models gravity loading in an attempt to represent full-scale joist behavior during the push-off test procedure. The results illustrate that the current AISC specifications (ASD 1989; LRFD 1986) do not accurately predict stud strength for studs placed in ribbed metal deck when the deck is perpendicular to the shear loading. / Master of Science

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 101-103). Also available via the Internet.

The results of sixty-five double-sided pushout tests utilizing the Elco grade 8, 5/16 in. diameter, standoff screw functioning as a mechanical shear connector are presented. In all tests, the base material, through which the screw was fastened, was fabricated out of back to back angle to simulate the top chord of an open web steel joist. Varied test parameters include: steel deck profile, base angle thickness, screw embedment depth, slab thickness, and slab width. The objectives of the testing were (1) to provide an understanding of the strength of the standoff screw in various test geometries and (2) to provide an understanding of the slip characteristics, or ductility, of the connector. A review of literature presents several applicable existing welded stud strength models based on post-test observations of failure mechanisms. Modeled failure mechanisms include: concrete splitting, concrete pullout, rib shear, and stud shear. After applying the existing models to the pushout test data, the following conclusions are drawn: (1) the concrete splitting model developed by Oehlers (1989) can be used to predict the strength of the standoff screw in flat slab geometries and (2) no existing model adequately predicts the strength of the standoff screw in geometries utilizing profiled steel deck. An equation, based on a rederivation of a wedged shaped shear-cone pullout model (Lloyd & Wright 1990), is presented which predicts the strength of the standoff screw in geometries with steel deck with acceptable accuracy. / Master of Science

The use of deck fasteners as shear connectors for composite open web steel joists is studied. Results of thirty-six push-off tests are evaluated in terms of strength and behavior. Six types of deck fasteners are considered. They are: 1. #12-24 Teks/5 self-drilling, self-tapping screws. 2. 1/4-14 Teks/3 with a 1 1/4 in. stand-off sleeve. 3. 1/4-14 Teks/3 with a 1 3/4 in. stand-off sleeve. 4. 1/4-14 Teks/3 with a 2 1/4 in. stand-off sleeve. 5. 0.150 in. dia. air fired pins. 6. Puddle welds (5/8 in. and 3/4 in. diameter). All push-off tests utilize Vulcraft 1.5 VL, 22 gage, composite deck. Several modifications to the typical push-off test arrangement are made, which will permit the test to more closely model the top chord of an open web steel joist. It was found from the push-off test results that all of the deck fasteners, tested in this study, can obtain composite action for snort span open web steel joists with the exception of 0.150 in. diameter air fired pins. A description and the results of each push-off test is included. / Master of Science