Risa 3 D - SidePlate Systems · beam and column stiffness with the SidePlate® stiffness. ... FOR A W30X90 IN THIS EXAMPLE ... please refer to AISC Steel Manual

For more information: Toll Free 800 475 2077 Tel 949 238 8900 www.sideplate.com

Pg 1 of 6Structural Design Optimization

CONNECTION STIFFNESS IMPLEMENTATION PROCEDUREFOR Risa 3D USERS

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Modeling of Lateral Frames Using SidePlate® Connection Technology:

The inherent SidePlate® connection stiffness can be implemented within ETABS or SAP by replacing the

beam and column stiffness with the SidePlate® stiffness. The SidePlate® connection provides a 100% rigid

panel zone at the column and increases the beam section properties for a distance of approximately the

beam depth (Db) beyond the face of the column. Refer to the SidePlate® Tech Tips document for a

description of the different SidePlate® connection types and general design guidelines.

Figure 1 - SidePlate® Bolted connection elevation Figure 2 - SidePlate® Bolted connection section

USING NON-PRISMATIC BEAM SECTIONS is the most accurate way of implementing the SidePlate®

connection properties in RISA 3D.

The stiffened SidePlate® section extends from column face to Dim A (shown in Figure 1). This stiffened

SidePlate® section, which consists of the physical side plates {A}, cover plates {B} and beam, has an

approximate moment of inertia (3) times that of the beam alone for SMF, IMF and OMF applications and (1)

times the moment of inertia of the beam for R=3 applications.D

b

Column

Beam

C ColL

100% RIGIDPanel Zone

Side plate {A}

Stiffened Region

Column/BeamSeparation

ELEVATION

Dim A

Dim

B

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STEP 2:

Create General Section Sets of RIGID LINK.

(See Figure 4)

STEP 3: DETERMINE THE LENGTH OF RIGID LINK

• RIGID LINK length at beam end is determined by half of column depth

• RIGID LINK length at column end is determined by beam depth + 3"

STEP 4: SPLIT BEAM AND COLUMN MEMBERS

• On the top of Risa menu, go "Modify -> Split Members..."

• Input the RIGID LINK length in % or ft, select "Actually Split PHYSICAL Members" and "Apply Entire to All

Selected Members", split all beams/columns with the same length and the same RIGID LINK length at once.

STEP 1:

Create General Material Properties of RIGID LINK.

(See Figure 3)

RIGID LINK LENGTH = 7"FOR A W14X90 IN THIS EXAMPLE

RIGID LINK LENGTH = 33"FOR A W30X90 IN THIS EXAMPLE

Figure 3 - General Material Properties

Figure 4 - General Section Properties

Figure 5 - Rigid Link

Figure 6 - Split Members



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• In R=8 projects, to create Non-Prismatic beam sections at each end of the moment frame beam is to split

both ends of moment frame beams as STEP 4 with the length of SidePlate dimension A. Then assign

Non-Prismatic Section Properties to the split members. See Appendix for examples.

STEP 6: CREATE NON-PRISMATIC SECTIONS FOR R=8 PROJECTS

• Both ends (I End and J End) of RIGID LINK

shall be assigned as "Fully Fixed (No Release)".

STEP 5: ASSIGN FIXITY OF RIGID LINK

• To obtain the approximate connection plate weight for a specific project, simply email your Risa 3D

model to [email protected]. One of our engineers will review the model for validation and reply

with the connection plate weight.

STEP 7: CONNECTION WEIGHT

To obtain the SidePlate Non-Prismatic Section Design Properties and SidePlate Dimensions, please

contact [email protected] for more information.

• Both ends (I End and J End) of Non-Prismatic Section shall be assigned as "Fully Fixed (No Release)".

Figure 7 - Rigid Link Fixity

Figure 8 - Non-Prismatic Properties



Appendix

Examples of Modeling SidePlate® Non-Prismatic Beam in Risa 3D:

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Create and assign Non-Prismatic SidePlate Beam Properties: “Modify” on the top menu bar, click on “Shape

Database”, when “Shape Selection” window pop-up, click on “Add”.

In “Add Shape” window, input NPSP property values, and click “ok”. Then RE-OPEN “Shape Selection”

window, select the custom shape just created and click “Edit”.



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In “Edit Shape” window, match NPSP properties with “SidePlate Non-Prismatic Design Properties”. For

properties not included in “SidePlate Non-Prismatic Design Properties”, please refer to AISC Steel Manual.

Examples:



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Assign NPSP beam properties to Risa model: Double click on NPSP member, in “Information for Member

XXX” window, click on “Properties” TAB, click on “Shape List”, in “Shape Selection” window, select the

proper custom shape just created, then click “OK” and “OK”.

Documents

Risa 3 D - SidePlate Systems · beam and column stiffness with the SidePlate® stiffness. ... FOR A W30X90 IN THIS EXAMPLE ... please refer to AISC Steel Manual