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Verification Example 09

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Vassilis Papanikolaou edited this page Jan 13, 2020 · 1 revision

Large axial displacements

Download Example 9 model (v2.7.0)

Description

A three-hinged arch is subjected to a pseudo-static vertical load P (displacement) applied to the central joint in order to test static nonlinear analysis with large axial displacements.

The resulting vertical support reaction at joint 1 obtained with the FE analysis program GiD+OpenSees is compared with SeismoStruct results. The model lies in the X-Y plane.

Geometry and Properties

Material Properties:

E = 199.938 GPa

Section Properties:

A = 0.017 m2

I = 4.158e-4 m4

Modeling and Loading

A rigid link is introduced between the two coincident nodes 2 (master) and 4 (slave), restraining the X, Y and Z degrees of freedom. The base nodes are restrained in X, Y, Z, RX and RY.

The load P is defined as a permanent displacement load, applied at joint 2 in the Y direction with a value of 0.3048 m.

The FE model is presented below:

Analysis Type

Static analysis (non-variable load).

Results and Comparison

The most significant results are compared in the table below:

Output Parameter GiD+OpenSees SeismoStruct 2016
Fy,1 [kN] 15468 15556

Fani Derveni, Vassilis K. Papanikolaou

Developed in the Lab of R/C and Masonry Structures, School of Civil Engineering, Aristotle University of Thessaloniki, Greece, by T. Kartalis-Kaounis, V.K. Protopapadakis and T. Papadopoulos, Dipl. Civil Engineers, under the coordination of V.K. Papanikolaou, Assistant Professor.

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