Multi-Science publishers have made some of their journals available online for free. It is worth looking into while it lasts.
These are the journals that they have available:
Adsorption Science & Technology, Advances in Structural Engineering, Building Acoustics, Energy & Environment, Energy, Exploration & Exploitation, International Journal of Aeroacoustics, Journal of Low Frequency Noise & Vibration, Noise & Vibration Worldwide, Noise Notes, Space Structures, Wind Engineering.