Numerical Methodology to Minimize Resolution and Sensitivity Effects in P-Wave Measurements

• Autor(a) principal: M. F. Amaral
• Data de Publicação: 2013
• Outros Autores: A. Viana da Fonseca, S. Rios
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: https://hdl.handle.net/10216/83485
• topic: Geotecnia, Engenharia do ambiente; Geotechnics, Environmental engineering

This paper presents a new numerical methodology aiming at facilitating the identification of seismic wave's propagation time, using a time domain approach. The solution uses first- and second-order differential computing, namely divided differences methods. Results of extensive laboratory seismic wave tests over aggregate-cement mixtures with different voids ratios (densities) and cement contents (1 %, 2 %, 3 %, 4 %, and 5 %) are discussed. The results indicated relevant differences in values of longitudinal modulus (or P-wave modulus) derived with and without this methodology. This was considered especially important in stiff specimens with high-seismic wave velocities and low-energy input signals.