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Design Results Report

John Lange — Mon, 09 May 2022 01:43:12 GMT

The Minimum f'c Report: "This report shows the minimum required concrete strength to satisfy the compressive stress requirements. The required concrete
compressive strength for top and bottom of the section are reported in separate columns."

Is this report giving the required minimum concrete strength or a ratio? The column headings are in ksi not C/D ratio.

The report flags values less than 1.0.

The graphic output shows Force (ksi) vs. Position along box girder (ft).

Minimum f'c Report

John Lange — Thu, 28 Apr 2022 23:57:35 GMT

Minimum f'c Report

This report shows the minimum required concrete strength to satisfy the compressive stress requirements. The required concrete compressive strength for top and bottom of the section are reported in separate columns. This report is available for all cases.

The values for the initial case are based on initial concrete compressive strength (f'ci), and thus concrete allowable stress factors for the initial condition.

The Top and Bottom columns show the minimum required concrete strength to satisfy the concrete compressive stress requirements at the location.

In the left image I don't understand why the output is being flagged, (*): "provided is less than required". Isn't it similar to the right image from the CIP RC/PT girder help.

Isn't the value being reported the "minimum required concrete strength to satisfy the concrete compressive stress requirements"?

The initial concrete strength being used is f'ci = 5000 psi.

Thanks

Live load application to straddle bent

John Lange — Fri, 22 Apr 2022 22:48:16 GMT

I am designing a post-tensioned straddle bent. The superstructure has 6 girder lines. Is it possible to define a design truck using fixed axle spacing so it appears "stationary" to reflect the live load reactions from girders to a post-tensioned straddle bent? For example the bearing locations = axle fixed spacing from the left end are: G1-G2-G3-G4-G5-G6 = 63.5'-7.5'-7.5'-7.5'-7.5'-7.5'.

Post-tensioned straddle bent design using CONBOX

John Lange — Wed, 10 Nov 2021 18:35:53 GMT

Any advice on applying live loads from the superstructure to a CIP PT straddle bent design in CONBOX. Is there a different module to use in place of Conbox?

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Wed, 10 Nov 2021 03:00:53 GMT

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