抄録
In Japan, Steel beams and concrete slabs with cellular steel decks are often combined as illustrated in Fig. 1 (a). A series of studies on composite beams of this type was undertaken by A.I.J. Steel Structure Committee. As part of the stubies, authors started to investigate the shear strength and behavior of stud connectors embedded in a composite beam with or without ecllular steel decks. Other than the above, the study had a purpose to examine the behavior of connectors embedded in a composite beam subjected to positive or alternating bending moment. As a result, new loading systems were invented as shown in Fig.5. Fifty-one push-out specimens were tested during this investipation. These specimens were named as illustrated in Table 1 and the details of some specimens are shown in Fig.3. Properties of slab concrete and connector steel are given in Table 4 and Table 5. Ultimate load per shear connector of each push-out specimen is as listed in Table 6. The following conclusions were drawn from the study : 1. The shear strength of stud connectors of P-N type specimens agreed with Fisher's Equation (2). 2. The shear strength of P-T type specimens can be expressed as Equation (4). 3. The ultimate load of P-DJ specimens was higher than that of P-N specimens, whether or not cellular steel decks are connected with a steel beam. 4. The shear strength of all specimen subjected to T-Loading was lower than that subjected to P-Loading. 5. There were no difference between the test results of DJS type specimens and those of DJC type specimens.
