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International Translations. International Concrete Abstracts Portal. Besides the three loading conditions studied in Cases to , a single load is applied at E in Case For the geometric details, refer to Figure 6. Results and Discussion The results of crack analysis for Cases to are presented and discussed.
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Cases to For the same reasons as in the previous cases, Cases and are analyzed using half-models, and the solutions of Cases and are based on full-models, as shown in Figure 6. As seen, with the increasing number of initial notches, the critical locations for crack propagation under the four-point and the three-point bending shift to notches D and E, alleviating the stress concen- trations at notches A and C. This is manifested by the less-aggressive crack propagations at notches A and C that are confined only to the prepeak regions.
As shown in Table 6. It is interest- ing to note that despite the apparent differences found in Cases and regarding the loading conditions and cracking behaviors, the two peak loads are almost identical with a reduction of more than 20 percent from Case Comparing Cases and and Cases and based on the similarities of the cracking behaviors, it seems that the smaller peak load in each of the two cases is caused by the larger moment at the location of the critical crack or cracks generated under the corresponding load conditions since the moment at E in Case is 25 percent greater than that in Case , and the moment at E in Case is 9 percent greater than that at C in Case A careful comparison of the peak loads between Cases and , and Cases and in Tables 6.