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Foundation Load-Displacement Response from Small-Strain Stiffness

机译:小应变刚度的基础荷载-位移响应

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The vertical load-displacement-capacity response of footings is numerically evaluated in FLAC simulations using embedded stress-strain-strength curves that range from the small-strain shear modulus (G_(max)) to the shear strength (τ_(max)). As strains and loads increase, the modulus is reduced accordingly using a logarithmic function with physically-based parameters, including a reference strain (γ_r = τ_(max) /G_(max)) and strain at failure (γ_f). The ratio of these two strains (x_L = γ_f/γ_r) defines the degree of nonlinearity of the stiffness reduction. An approximate closed-form expression is derived and applied to a case study footing load test.
机译:在FLAC模拟中,使用从小应变剪切模量(G_(max))到剪切强度(τ_(max))的嵌入式应力-应变-强度曲线,对基础的竖向荷载-位移-能力响应进行了数值评估。随着应变和载荷的增加,使用具有基于物理参数(包括参考应变(γ_r=τ_(max)/ G_(max))和破坏应变(γ_f)的对数函数,模量会相应降低。这两个应变的比值(x_L =γ_f/γ_r)定义了刚度减小的非线性程度。得出近似的封闭式表达式,并将其应用于案例研究基础荷载测试。

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