Various aspects of calculations needed to be verified (friction losses, etc. Obtain design based on the summary sheet Significant time investment required (to consider locked-in stresses and estimate PT losses over time) Other load considerations such as wind loads, earthquake loads needed in the design can be found on the different codes that the local building authority is authorizing with. One tab for each construction stage considering concrete aging additional load placing (Approximate Loss Estimate as per AASHTO available)įor each stage, the results can be reviewed in details as: Stress after immediate loss, elastic deform loss, creep/shrinkage loss, relaxation loss, stress after all loss, tendon elongation, element elongation, and time-dependent loss graph for each stage and each tendon strand.ĭesign of Straddle Beam using Spreadsheet The time-dependent material function will progress aligned with the construction stage analysis duration set up.ĭetailed PT loss results for each construction stage Use built in CEB-FIP / ACI / AASHTO database to create the creep/shrinkage function. Time-Dependent Effect of Creep & Shrinkage (Age Consideration) The construction stage analysis can be set up to reflect prestressing, concrete pouring, and aging details. The powerful graphic user interface and tree menu especially helped in clearly visualizing the overall condition and details of each stage set up.Ĭoncrete pouring sequence (with locked-in stress considered) Using the regular functions in midas Civil, the customized beam geometry, pouring sequence and property was reflected in great detail. One of the major strength of midas Civil is easy modeling. The speaker will go through how he utilized midas Civil for this project, specifically for the post-tensioned beam design. Also, midas Civil provided flexible work environment for the speaker to customize the structure geometry, property, pouring sequence, etc. If you are going to get much more creative, say you’re modelling a moving bridge,CSI Bridge becomes difficult to use. It is easy to use for specific bridge types but difficult to do anything else. In midas Civil, the construction stage analysis is easily set up together with the prestressing loading, time dependent material definition, and related group definitions to consider all of the above. Answer: CSI Bridge: This is a wizard based software. The work required consideration of multiple concrete pour (locked-in stress), time-dependent effect of compressive strength, creep and shrinkage, relaxation of prestressing steel, and various parameters including PT losses. Since the beam was constructed in multiple concrete pours, it was important to consider locked-in stresses, in addition to the effect of the time-dependent effects of creep and shrinkage of the concrete, along with the relaxation of prestressing steel. Due to the length and heavy loading, the straddle beam was post-tensioned, which required the evaluation of the beam in all stages of construction and loading. And IDEA StatiCa Steel can design all types of welded or bolted connections according to various codes of practice.To minimize the structure depth of the new bridge carrying SH92 over the UPRR, a straddle beam was utilized. IDEA StatiCa Concrete provides economic and safe code-checks of common, as well as complex, non-standard reinforced, prestressed concrete cross-sections. Its highly developed modeling and analysis functions enable engineers to overcome common challenges and inefficiencies of finite element analysis.
It features a distinctively user-friendly interface and optimal design solution functions that can account for construction stages and time-dependent properties.
Each stage is relative to time, which can be input in terms of number of days.
The software activate or deactivate structural members, loads, and boundary conditions, or all three, at any given stage.
Midas uses stages to control construction sequences. Midas Civil/Gen is a state-of-the-art engineering software that sets a new standard for the design of bridges and civil structures. Construction stage analysis in midas Civil. Why midas for the global model and analysis?.
Using two powerful tools will make you an efficient engineering expert