Efficient numerical simulations on the forest barrier for seismic wave attenuation: engineering safe constructions

• DOI: 10.3389/fbuil.2024.1301049
• Publication Date: 2024-02-29T04:37:56Z
• Authors: Qahtan Al-Shami; Jiankun Huang; Mugahed Amran; Saleh Mugahed; Ayed Eid Alluqmani; Mohammed Al-Haaj; Yaser Gamil; Hakim S. Abdelgader
• Keywords: periodic structure; low-frequency wide BGs; Mechanical Engineering; seismic waves; forest metamaterial; 02 engineering and technology; Engineering (General). Civil engineering (General); Civil Engineering; Samhällsbyggnadsteknik; Maskinteknik; 0201 civil engineering; HT165.5-169.9; FRF curves; TA1-2040; City planning

This paper aims to elucidate the clear visibility of attenuating seismic waves (SWs) with forest trees as natural metamaterials known (FMs) arranged in a periodic pattern around protected area. In analyzing changeability FM models, five distinct cases “metawall” configurations were considered. Numerical simulations conducted study characteristics bandgaps (BGs) and vibration modes for each model. The finite element method (FEM) was used illustrate generation BGs low frequency ranges. commercial code COMSOL Multiphysics 5.4a adopted carry out numerical analysis, utilizing sound cone strain energy method. Wide generated Bragg scattering local resonance owing gradual variations tree height addition vertical load form mass simulate foliage. results promising confirmed applicability FEM based on parametric design language ANSYS 17.2 software apply boundary conditions proposed models at frequencies below 100 Hz. effects mechanical properties six layers soil geometric parameters FMs studied intensively. Unit cell layouts an engineered configuration arranging theory achieve significant controlling ground vibrations, which are valuable protecting large number structures or entire city, recommended. Prior construction, region exerting control over advantageous. exhibited effect ‘trees’ upper portion (e.g., leaves, crown, lateral bulky branches) change width position BGs, refers attenuation mechanism. Low ranges less than Hz particularly well suited SWs FMs. However, engineering safe city construction should be basis arrangement urban allow shielding specific