Structural cracks occur when internal forces—such as bending moments, shear forces, or torsion—exceed the capacity of the concrete or steel material. ideCAD enables engineers to identify these potential weak points through advanced analysis modules. A. Finite Element Method (FEM) Modeling
If you have already downloaded a file labeled idecad_structural_crack.rar , perform these checks:
For sections that do crack, ideCAD provides explicit crack width checks. The software utilizes methodologies based on the design code selected. For example, in alignment with Eurocode 2, the crack width ( wk ) is a function of the maximum crack spacing ( sr,max ) and the difference in mean strain between the steel and concrete (εsm – εcm), expressed as:
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Instead of requiring engineers to manually calculate effective inertia, ideCAD applies specific stiffness modifiers. According to ACI 318-19 Table 6.6.3.1.1(a):
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Diagonal cracks (roughly 45 degrees) near beam supports or column-beam joints.
Helical or diagonal cracks wrapping around a structural member, caused by twisting moments.
Standard Stiffness Reduction Factors (Example: ACI 318 / TBDY) Usually reduced to 0.70Ig0.70 cap I sub g
Using the 'Analysis Plus Design' command, ideCAD conducts comprehensive vertical load analysis and modal analysis to understand natural vibration modes. This helps identify resonance issues that can lead to excessive deflection and subsequent cracking. C. Pushover Analysis
While these are valid pain points,
Earthquakes cause rapid reversing forces. ideCAD's Seismic Wizard allows engineers to define ductility levels, soil classes, and site classes to accurately determine the structural response. The analysis shows where damage (cracking) is most likely to occur during a seismic event. D. Thermal and Creep Movement
For sections subjected to torsion, ideCAD checks the cracking torsion ( Tcr ). This is calculated by comparing the factored torsional moment ( Tu ) with the threshold torsion ( Tth ). If Tu is below Tcr , torsional cracking is not expected, and specific detailing may be waived.
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As of 2024, ideCAD has moved toward a SaaS (Software as a Service) model. Instead of buying a perpetual license (which is expensive), you can pay monthly. A monthly subscription is often less than the cost of a single dinner out—and it includes:
Understanding and Resolving Structural Cracks in ideCAD: A Comprehensive Guide
4. Step-by-Step Workflow to Fix Stress & Crack Failures in ideCAD
Elara had caved. She had silenced the warnings, locked the critical load combinations, and told the virtual construction crew to pour the concrete anyway.