Similar Material Proportioning Tests and Mechanical Properties Based on Orthogonal Design

Abstract

Shaking table tests serve as an effective method to simulate landslides triggered by seismic activities. These laboratory experiments necessitate the use of materials that mimic those encountered in real-world scenarios. For this investigation, materials analogous to field conditions for the shaking table tests were formulated using quartz sand, barite powder, iron powder, gypsum, rosin, and alcohol. Within the model test compositions, iron powder, barite powder, and quartz sand acted as aggregates; gypsum functioned as an additive, and a solution of rosin and alcohol was employed as a binder. Employing the orthogonal design method, the physical and mechanical parameters of these analogous materials were ascertained through double-sided shear tests, as well as uniaxial compression and splitting tests. Subsequent analyses included extreme difference and regression assessments targeting the determinants influencing the physical and mechanical characteristics of these materials. The ultimate goal was to determine the optimal mixing ratios for the model test materials. The findings revealed that the physical and mechanical properties of analogous materials at varying ratios span a broad spectrum, fulfilling the criteria for distinct rock model experiments. A thorough examination of the factors impacting the physical and mechanical properties of these materials was undertaken, elucidating their respective influences. Based on the relative significance of each determinant on the mechanical attributes of the analogous materials, dominant factors were identified for a multiple regression analysis, from which the regression equations corresponding to the test ratios were derived.

Investigation of Sandstone-like Material for Damaged Rock Mass Based on Orthogonal Experimental Method

“…Furthermore, the tensile strength increases gradually as the level of factor A increases. A similar phenomenon was observed in similar material tests by Yang et al [37], where compressive strength and shear strength increased with the gypsum content. Similarly, the range of the Poisson's ratio across different levels of factor C is the largest at 0.09, suggesting that factor C has the most pronounced effect on the Poisson's ratio.…”

Structural Behavior of a Fixed-End Arched Cellular Steel Beam without Lateral Support

“…The buckling load (P cr ) is equal to the initial applied load multiplied by the eigenvalue (λ). According to the out-of-plane elastic buckling load value, the order of factors affecting the out-of-plane stability performance is determined using the range analysis method of the orthogonal test [42]. The range value of each factor is as follows:…”