Classification of severity (guideline):
For structural engineers working with the ATIR Engineering suite, the combination of (Structural Analysis Programs) and BEAMD (Beam Design and Detailing) provides a specialized workflow for handling complex concrete behavior, including cracking analysis . Understanding the STRAP and BEAMD Workflow
STRAP (Structural Analysis Programs) is a powerful finite element analysis static and dynamic analysis program. When dealing with concrete structures, ignoring the cracking of concrete will lead to an underestimation of deflections. To handle cracks in STRAP:
: Instead of utilizing a small number of large-diameter reinforcing bars, select a larger quantity of smaller-diameter bars. This drastically minimizes the maximum crack spacing ( sr,maxs sub r comma m a x end-sub atir strap and beamd with crack
: Input the analysis results to generate reinforcement schedules and verify that the physical "cracks" stay within the allowable limit of the chosen design code. ATIR -.:LAVteam:.
ATIR STRAP and BEAMD software are utilized for the structural analysis and reinforced concrete design of strap beams, specifically to address cracking through shear, moment, and crack width verification. Following identification of structural cracks, mitigation strategies often involve strengthening with CFRP sheets or remedial mortar. For detailed information on beam design, visit ATIR Soft . ATIR -.:LAVteam:.
Strap beams (or "atir" strap beams, as often referred to in structural software contexts) are critical for connecting eccentrically loaded footings, yet they are frequent victims of structural cracking due to differential settlement or excessive shear. Whether you are a structural engineer modeling these in ATIR STRAP or a contractor fixing them on-site, understanding the "crack" is the first step to a solution. 1. Modeling the "Cracked" Reality in ATIR STRAP To handle cracks in STRAP: : Instead of
: Functions as the main Finite Element Method (FEM) 3D analysis package to solve global static, dynamic, and seismic reactions.
[ Tension Zone / Service Loads ] │ ▼ ┌──────────────────────────────┐ │ ATIR STRAP Global Solver │ ──► Generates Moment & Shear Envelopes └─────────────┬────────────────┘ │ (Exports Element Forces) ▼ ┌──────────────────────────────┐ │ BEAMD Detailing Module │ ──► Calculates Neutral Axis & Steel Area (As) └─────────────┬────────────────┘ │ (Serviceability Limit State Check) ▼ ┌──────────────────────────────┐ │ Crack Width Code Enforcement │ ──► Controls crack parameter: w_max ≤ 0.2mm / 0.3mm └──────────────────────────────┘
By comparing the service moment to the cracking moment, it recalculates the matrix with realistic effective inertia ( Iecap I sub e ATIR STRAP and BEAMD software are utilized for
If you are dealing with a specific structural problem,g., ACI 318, Eurocode 2, BS 8110). The and loading conditions of your beam profile.
For narrow, stable cracks, injecting epoxy resin can seal the crack and restore some structural integrity.
For structural cracks that are no longer moving, low-viscosity epoxy is injected to restore structural integrity 8.
If the strap beam is elevated above the soil to purely transfer eccentric moments between footings, remove intermediate spring supports. Restrain only the endpoint nodes to replicate the physical columns and footing constraints. 2. Incorporating Cracked Section Properties in ATIR STRAP
Below is a practical guide covering for both elements.
