**3. Development of Data Bank**

Having recognized that different beam-to-column connections have different behavior and pushdown resistance capacity, especially the catenary mechanism, it is necessary to develop a database of test results. In this section, with the aid of available full-scale test results on double-span assemblies, this is comprehensively investigated in the performance of different steel beam-to-column connections against progressive collapse. The specimens consist of fully rigid (welded flange-welded web, SidePlate), semi-rigid (flush end-plate, extended end-plate), and flexible connections (top and seat angle, web cleat). Figure 3 depicts the configuration and geometric details of the studied connections.

#### **Figure 3.** *Cont.*

**Figure 3.** Configuration and geometric details of studied connections.

Table 2 shows the information of the tested specimens, including the connection type, connection category, and relevant references. In this research, there was an emphasis to select double-span assemblies having similar span-to-depth ratios, *R<sup>i</sup> .* One important implication of this procedure is that it enables an adequate comparison between different types of beam-to-column connections since the effects of different spans and beam sections were filtered out.


## **Table 2.** Summary of Tested Specimens.
