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Open image in new window Fig. 13 Record of acceleration at middle span (unit: m/s2).
That means the middle span moves as a whole body under the loads.
The load is constant along time and applied at the middle span on the beam top.
Open image in new window Fig. 8 Observations of acceleration at middle span (unit: m/s2).
Open image in new window Fig. 10 History of acceleration at middle span (unit: m/s2).
Figure 4 shows the middle span section of the simply supported beam, using C50 concrete.
Stresses development at the middle span section was greatly affected by the failure modes.
That is because they are just located at both sides of the middle span.
Open image in new window Fig. 6 Record of vibration displacement at middle span (unit: mm). a Lateral, b vertical Open image in new window Fig. 7 Record of vibration amplitude at middle span (unit: mm). a Lateral, b vertical.
Overall, the specimens exhibited the same general cracking patterns beginning with initial cracking in the form of pure flexural cracks in the middle span followed by flexural-shear cracks just outside of the middle span.
Open image in new window Fig. 9 Maximum of amplitude at middle span (unit: mm). a Lateral, b vertical.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com