【1】Problem Description ( Midas Gen’s Verification Examples GNL-1: Geometric nonlinear analysis of a high arch structure)
Obtain load-displacement relation curves at the point of load application on a 100 m radius,
high arch structure. Carry out a geometric nonlinear analysis for the results.
Structural geometry and analysis model
【2】MODEL Properties
Dimension
100 m radius
Element
Beam element
Material
Modulus of elasticity E = 6.0 × 10 6 Pa
Poisson’s ratio
ν = 0.3
Element Property
Area A = 1.0 m 2
Moment of inertia I yy = 0.16667 m 4
Boundary Condition
Nodes 1 : Constrain Dx, Dz. & Ry
Nodes 51 : Constrain Dx & Dz
Load Case
A concentrated load, 1000 N is applied to the node 26 in the (-)Z direction.
【3】Midas Gen Model
【4】Midas 2 Abaqus Model
【5】Abaqus Model
【6】Abaqus Results
（1）Increment 1
（2）Increment 7
（3）Increment 16
（4）Increment 24
【7】Comparison of Results
Displacement of node 26
PS. Abaqus 的弧长法算到峰值附近就不收敛了，具体后续再详细原因。 也欢迎做个相关分析的小伙伴能多多指教一下。
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