Data on 324 Holstein bulls from the July 1983 USDA Sire Summary and Holstein Association type evaluations were analyzed using multiple regression to determine which traits or combination of traits in a sire evaluation are most important in determining the price of a straw of semen. Over all bull studs, type was a major economic influence in determining price of semen. When bulls with outlier pr...

This study proposes an innovative pennon plate-headed stud of shear connectors. The proposed consists two triangular-shaped steel plates on both sides the headed stud; it is expected to increase capacity a steel-concrete composite connection. Nonlinear finite element analysis carried out using ABAQUS analyze response 54 models PPH studs. A full factorial design and variance are employed in expe...

To enhance the robustness of steel-framed structures in fire, a novel, axially ductile connection has previously been proposed. In this paper its performance is investigated when it used to connect composite beams steel columns steel-concrete construction. The designed satisfy ductility demands beam at elevated temperatures. A reinforcement component added bare-steel model establish component-b...

This research effort focuses on the evaluation of existing design standards for cold-formed steel stud walls and the development of retrofit wall systems. Full-scale wall systems are tested under uniform static pressure using a vacuum chamber. The resistance functions obtained are used to model the dynamic behavior of the walls and to predict performance under blast conditions. This paper focus...

Current formulas to assess the shear capacity of headed steel stud anchors and post-installed (PI) in case pryout failure (sometimes known as pull-rear failure) have been derived either based on indirect-tension resistance model or are fully empirical push-out test results. In both cases, predicted is clearly conservative underestimates true anchorages, especially for stiff with low embedment-t...

The current design rules for cold-formed steel studs used in wall systems subject to non-uniform elevated temperature distributions are complicated with iterations and different section properties. This paper first investigates the accuracy of effective width method (EWM) direct strength (DSM) based equations, then simplifies calculation process without compromising calculating load ratios (ele...