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<p>The paper presents viscoelastic finite-difference pseudo-dynamic broadband synthetization of translational near-fault ground motion and quantification of peak-values and variability of fling and rupture directivity induced ground strains and rotations due to change of slip-pattern, nucleation-position and rupture-velocity in the case of Mw6 strike-slip earthquake. Fling and rupture directivity have caused pulse-type motions in the FP- and FN-components over the extent of rupture length and beyond it, respectively. The obtained values of shear strain <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({\varepsilon}_{XY}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>ε</mi> <mrow> <mi mathvariant="italic">XY</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and torsion is largest among the strains and rotational motions, respectively. The values and variability of ground strains and rotations are largest near the fault-line and a decrease with an increase of off-set. The largest and least variabilities of strains and rotations is obtained in the case of change of slip-pattern and rupture velocity, respectively. The values of shear strain <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({\varepsilon}_{XY}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>ε</mi> <mrow> <mi mathvariant="italic">XY</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and torsion induced by fling is larger than that induced by rupture directivity.</p>

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Physics based translational ground motion synthetics and quantification of fling and rupture directivity induced ground strains and rotations: a comparative parametric study

  • 期刊论文

  • 发表日期：

    2026年6月20日

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  • J. P. Narayan,
  • Vishal,
  • Lav Joshi,
  • M. L. Sharma

摘要

The paper presents viscoelastic finite-difference pseudo-dynamic broadband synthetization of translational near-fault ground motion and quantification of peak-values and variability of fling and rupture directivity induced ground strains and rotations due to change of slip-pattern, nucleation-position and rupture-velocity in the case of Mw6 strike-slip earthquake. Fling and rupture directivity have caused pulse-type motions in the FP- and FN-components over the extent of rupture length and beyond it, respectively. The obtained values of shear strain \({\varepsilon}_{XY}\) ε XY and torsion is largest among the strains and rotational motions, respectively. The values and variability of ground strains and rotations are largest near the fault-line and a decrease with an increase of off-set. The largest and least variabilities of strains and rotations is obtained in the case of change of slip-pattern and rupture velocity, respectively. The values of shear strain \({\varepsilon}_{XY}\) ε XY and torsion induced by fling is larger than that induced by rupture directivity.