Analysis of concrete structures subject to elevated temperatures

  • New thermal module including radiation boundary condition and temperature dependent heat transfer parameters λ(Θ), c*(Θ), and thermal dilatancy a(Θ)

  • Equivalent to the EC2 extended model for reinforcement steel at elevated tem­peratures

  • Modified Lee-Fenves model for concrete extended to the range of elevated tem­peratures

    – Degradation functions for strength and stiffness according to the EC2
    – Model behavior in uniaxial compression test

– Transient creep

  • Uncoupled thermo-mechanical analysis for continuum 2D/3D and shells

For more detail, see a dedicated report for Concrete structures subject to elevated temperatures.

 Prestressed cables

  • Cables definied with aid of 2-nd or 3-rd order splines
  • Automatic generation of loss of prestress force

Cables embedded in beam elements

Cables embedded in shell elements and continuum elements

New postprocessing options

Extended failure/hardening/softening state analysis in continuum and layered structural elements

Drawing principal strains in continuum (different modes)

Drawing principal strains in layered shells and beams

Color contours of stresses/strains in core and reinforcement shell layers

Time history of any selected quantity in layered structural elements

Plotting time history with safety factor as an argument

Strains added to the output for layered structural elements

Damage level added to the output

New useful preprocessing options

Automatic setting of existence functions for elements in excavation/construction front

Automatic generation of seepage/convection elements on construction/excavation front

Automatic generation of initial stresses on construction front

Extrusion of Initial stresses/pressure/temperature superelements from 2D to 3D

Enhanced computation control

Saving restart point in separate subdirectory at final stage of a given driver

Canceling results for diverged steps

Switch to another nonlinear solver during run (on demand)

Selection of set of nonlinear solvers for automatic control of computation

Virtual Lab v18

a. includes the second formulation for the stress dependent stiffness power law based on the mean stress, p (in addition to sig-3 formulation)
b. new visual assistant for migrating moduli and stiffness exponent between the two power law formulations
c. includes the identification of stiffness moduli for mean stress-based power law in automatic and interactive parameter selection (new correlations HSREP18-2 and HSREP18-3)
d. enables running elementary triaxial and oedometer tests using mean stress-based power law

a. automatic Ko = KoNC*OCR^sin(phi)

a. representation a variable profile for Ko (meaningful for stress history through qPOP)
b. enables copying (extracting) data from the table

Identification algorithms for triaxial test data receive an optimization technique for an exact identification of effective secant modulus, failure ratio and stiffness exponent (E50, Rf and m) in normally- and lightly consolidated samples including isotropic and Ko-consolidation state (it solves the issues of underestimation of E50 due to mobilization of volumetric plastic strains in normally-consolidated samples for the drained tests and an inaccurate identification of effective parameters from undrained tests)

a. added new correlations (see “Correlation database change log”)

– General improvements towards readability and user-friendliness
– Speed improvements due to runtime linking to 64-bit libraries

For more detail, see a dedicated report for Virtual Lab.

ZSwalls 2018 – diaphragm/sheet pile wall template

Prepare complex data for an excavation problem within a matter of minutes and get automatically generate a report in a pdf format.

ZSwalls v2018 is a ZSoil’s module designed for fast modeling of deep excavations and retaining walls. The program can alternatively be used as a pre-preprocessing template in ZSoil  in order to speed-up data generation.

ZSwalls v2018 offers:
– user-friendly graphical interface
– simpli fied overall input strategy
– automated and user-con figured, ready to print reporting (see examples Tutorial 1 or Tutorial 2)