Beam Checking

Using the results obtained from the analysis of the entire structure and additional design data, verify the strengths of concrete beam members according to the following design codes: American Association of State Highway and Transportation Officials, Section 5 - Concrete Structures (AASHTO-LRFD 16), American Association of State Highway and Transportation Officials (AASHTO-LFD96), Concrete Structure Design Code of the American Concrete Institute (ACI318-02), (CSA-S6-00).

Jiao Tong bu Jian she bia zhun, Specifications for Design of Concrete Structures, 1985 (JTJ023-85), Korean Society of Civil Engineers (KSCE-USD96) and Korean Concrete Institute (KCI-USD99) are available upon request.

From the Main Menu select Design > RC Design > Concrete Code Check > Beam Checking.

Shortcut key : [Ctrl]+5

The strength verification results sorted by elements are based on the maximum negative and positive moments and shear forces calculated at the positions (I, M & J) of each element in accordance with the load combinations for concrete design.

The strength verification results sorted by properties are based on the maximum results obtained by considering all the elements and sectional locations pertaining to each section property in accordance with the load combinations for concrete design.

The results appear in blue when the strength verifications for the given section properties and rebars are satisfactory, otherwise they appear in red.

Strength verification can be performed by using the information on main rebars (diameter, number), sub-rebars (diameter, number) and design parameters entered by the user. Strengths cannot be verified without the rebar data.

The strength verification results are produced in the unit system selected by the user.

SEL: Select members for redesign and production of results.

ELEM: Element number

SECT: Section property number

Span: Length of beam member

Shape: Symbol for sectional shape

= SB: Rectangular section

= TEE: T-shape section

Bc, Hc: Width, height (depth) of beam member

bf, hf: Width, thickness of the flange of T-shape section

f'c: Design compressive strength of concrete

fy: Design yield strength of main rebars

fys: Design yield strength of shear rebars

POS: Section design points (I,M,J)

The checking results at M reflect the maximum negative and positive moments and shear forces at 1/4, 1/2 & 3/4 points.

CHK: Status of strength checking results

The above symbols representing the status are combined to show 밢K, NPV, N**, etc.
 

AsTop: The area of main top rebars entered by the user.

AsBot: The area of main bottom rebars entered by the user.

N(-)Mu, LCB: Maximum factored negative moment occurring in the relevant element or section and the corresponding load combination.

N(-)$Mn: Maximum negative moment capacity calculated based on the beam section dimensions and reinforcement

Rat-N: Factored negative moment / Negative design moment strength, which shows in red if it exceeds 1.0

P(+)Mu, LCB: Maximum factored positive moment occurring in the relevant element or section and the corresponding load combination.

P(+)$Mn: Maximum positive moment capacity calculated based on the beam section dimensions and reinforcement

Rat-P: Factored positive moment / Positive design moment strength, which shows in red if it exceeds 1.0

Vu, LCB: Maximum factored shear force occurring in the relevant element or section and the corresponding load combination.

$Vc: Concrete design shear strength for the beam member

AASHTO-LRFD02, (unit: N/mm2)

KSCE-USD96, (unit: kgf/cm2)

KCI-USD99, (unit: kgf/cm2)

RatV: Factored shear force / Design shear strength, which shows in red if it exceeds 1.0

When Serviceability is checked in the Beam Checking dialog box, crack width and fatigue requirements are checked as well.

CHK: Display the results of serviceability checks.

The above symbols representing the status are combined to show 밢K, TBF, TB*, etc.
 

Top-w: Calculated crack width at the top of the section

Top-wa: Allowable crack width at the top of the section

Bot-w: Calculated crack width at the bottom of the section

Bot-wa: Allowable crack width at the bottom of the section

fr: Range of max and min stresses of the reinforcing steel due to Moving Load

ff: Allowable stress (ksi)

where,

: Level of average minimum stresses (+ve for tension and 뻱e for compression) (ksi)

Common Control

 : Display the applicable code for strength verification.

"Sorted by Element" displays the results of strength verification for the maximum factored negative moment, positive moment and shear force at the sectional locations (I,M & J) extracted from all the load combinations.

"Sorted by Property" displays the results of strength verification of the member producing the maximum factored negative moment, positive moment and shear force at the sectional locations (I, M & J) representing all the elements attributed to the relevant section property. Since the results do not pertain to a single element, NOEL (element number) is "0".

Once property is selected, SEL controls all the elements attributed to the same section properties.

 : Display the unit system selected by the user.

When strength checking results are produced by elements, select an option whether to arrange the results on the basis of section numbers of element numbers in an ascending order.

 : Select all members

 : Cancel the selection of all members

Re-verify the strengths of the selected members. When the strength re-verification is executed from the results displayed by section properties all the elements attributed to the same sections are included.

 : Display detail strength verification results

 : Display simplified strength verification results

 : Produce the strength checking results in summary calculations for the selected members.

 : Produce the strength verification results in detail calculations for the selected members.

The design results "Sorted by Element" support the detail calculations.

 : Produce the summary list of strength checking results for the selected members.

The maximum forces (results of maximum reinforcing steel) calculated at each sectional location (I,M & J) are produced.

When RatN, RatP and RatV exceed 1.0, “*” appears to the right of the output values.

All: Produce all the strength checking results in the Checking Results dialog box

OK: From the strength checking results, display only the checking results that have met the design requirements (OK) in the Checking Results dialog box

NG: From the strength checking results, display only the checking results that have not satisfied the design requirements (NG) in the Checking Results dialog box

 : Check in the option to select and highlight the selected members in Model View.

 : Close the dialog box