: For deep beams exceeding a total height of 750 mm, add side-face ("skin") reinforcement bars within BeamD's reinforcement wizard to restrict crack propagation above the tension zone. Shear and Torsion Detailing STRAP 2018 - RC Beams (Design & Detail)
If you are encountering a "crack" when trying to use these programs, it typically means one of two things: you are dealing with a (an illegal bypass of the software license), or you are looking for how to model and analyze structural cracks in concrete using the software.
Apply stiffness reduction coefficients to the beams according to design codes (e.g., ACI 318 recommends 0.35Ig0.35 cap I sub g for cracked beams and 0.70Ig0.70 cap I sub g for columns). Rerun the solver to redistribute internal moments. The Non-Linear Post-Processor
If you're seeing a specific during the crack calculation, or if you're following a specific design code (like Eurocode 2 or ACI 318), let me know so I can give you the exact parameter settings. RC Beams - Atir Engineering Software Development Jan 15, 2021
Modern structural engineers rely on high-fidelity finite element analysis (FEA) software like ATIR STRAP and its integrated BeamD 2D module to model, analyze, and design structural components. Understanding how to accurately simulate cracked section properties, evaluate serviceability limits, and apply code-compliant detailing within the ATIR suite is essential for mitigation. 1. Mechanics of Beam Cracking & Structural Failure Modes atir strap and beamd with crack
In real-world engineering, a "cracked beam" isn't always a sign of failure, but it does require attention: Flexural Cracks:
Cracks in strap beams generally appear due to structural overloading, poor construction techniques, or geotechnical issues beneath the footings. Structural Overloading
This article will serve as a comprehensive guide to mastering crack analysis in beams using the ATIR STRAP and BEAMD software suite. Whether you are a seasoned engineer or a student entering the field, this deep dive will equip you with the knowledge to create designs that are not only safe but also durable and serviceable.
Are you accounting for concrete cracking in your finite element models? 🔍 : For deep beams exceeding a total height
STRAP solves the model, identifies cracked elements, applies the reduced stiffness values, and re-solves the model to find true deflections.
: Once tension exceeds the concrete's tensile strength, micro-cracks form, reducing the moment of inertia to its cracked state value ( Icrcap I sub c r end-sub Icr
Engineers begin by defining the beam geometry—spans, cross‑sectional dimensions, support conditions—within the STRAP environment. Material properties for concrete (compressive strength, tensile strength, modulus of elasticity) and reinforcing steel (yield strength, modulus) are specified according to the selected design code. Dead loads, live loads, wind loads, and seismic loads are applied either manually or using the program’s automatic load generation features.
: Click Crack Width > Display to see a color-coded map of predicted crack widths across your plate or beam elements. 🏗️ Managing Beams in BEAMD Rerun the solver to redistribute internal moments
Ensure STRAP models include precise soil-structure interaction.
is a comprehensive software system used by engineers for the analysis and design of buildings, bridges, and other structures.
If the structural model did not accurately account for the required steel, or if the steel was placed incorrectly, tension cracks will appear, particularly at the bottom of the beam.