Download RCB Manual PDF

TitleRCB Manual
TagsInstallation (Computer Programs) Microsoft Windows Cartesian Coordinate System Beam (Structure) Windows Xp
File Size11.2 MB
Total Pages201
Table of Contents
                            Self weight
Wind Forces
Equivalent Static Earthquake Loads
Starting with version 6.1, each one of the load cases genera
Response Spectra
Dynamic Time-History Analysis
Gravity and Lateral Load Analysis
Incremental Analysis
Creating the Structure
	In order to define the wall boundaries it is necessary to in
		To add beams
			To edit beam properties
		Making visible selected parts of the structure
Assigning Nodal Supports
	Applying Loads Manually
Generating Self Weight of Elements
Generating Floor Loads
Modes and Frequency Analysis
Displaying Mode Shapes
Generating Earthquake Forces
	To perform a spectral analysis
Analyzing the Structure
Displaying Analysis Results
	Bending Moment Diagram
		Figure 5.23 Displaying deformed shape
			Shear Force Diagram
				Support Reactions
Defining Load Combinations
	To display analysis results for load combinations
		Figure 5.28 Analysis results for active load combination
Designing Structural Elements
	To design beams
		Estimate of building materials
			To design columns
				Estimate of building materials
To design shear walls
	Estimate of building materials
Displaying Design Results
	To display beam design results
	To display column design results
		Seismic Shear Resisted by Shear Walls
			Cost of the Structure
				Modifying the Model
General
Local Coordinate System
Faces of Wall Element
Wall Stresses
Stress Resultants
Total Internal Forces
	LOAD SCALE
                        
Document Text Contents
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3


Analysis & Design of Reinforced Concrete
Buildings for Earthquake and Wind Forces

Page 2

COPYRIGHT

The computer program EngSolutions RCB and all associated documentation are proprietary
and copyrighted products. Worldwide rights of ownership rest with EngSolutions, Inc .
Unlicensed use of the program or reproduction of the documentation in any form, without prior
written authorization from EngSolutions, Inc., is explicitly prohibited.

Further information and copies of this documentation may be obtained from:





EngSolutions, Inc.
At: Dr. Ricardo E. Barbosa

8170 SW 29th Ct
Ft. Lauderdale FL 33328


Tel: (954) 370-6603
Fax: (954) 370-0150

www.EngSolutionsRCB.com
Email: [email protected]













© EngSolutions, Inc., 2000-2009
© Ricardo E. Barbosa, Ph.D. 1992-2000

http://www.engsolutionsrcb.com/
mailto:[email protected]

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The total weight of the building, computed from the load combination that was used to
determine the mass matrix (W = D0 + DL + 0.25 LL), is reported along with the static
base shear Vo in each direction. Press ENTER to accept the computed values. The
combined dynamic base shear cannot be smaller than Vo. The corresponding table is
shown in Figure 5.17.


• EngSolutions RCB reports in a table the Period T, for each mode of vibration and
the corresponding spectral acceleration Sa. In this table, the user may edit the values
of Sa. Hence, any response spectrum different from the code specified design
spectrum, includding the spectrum of a specific earthquake record, could be
considered in the spectral analysis. For our example we accept the spectral
acceleration obtained from the selected code. Click Next>>.

• A window is displayed, showing various methods of modal combination available,
including SAV, SRSS, CQC, ½(SAV+SRSS) and 0.25 SAV + 0.75 SRSS. For this
example select SRSS (square root of sum of squares) and click OK.






Figure 5.18. Design Base Shear


• EngSolutions RCB displays a table with the modal inelastic spectral acceleration
Sa/R, modal effective weight W’, and modal base shear Vm, for each mode and in

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each direction of earthquake loading. This table also shows, for each direction, the
Dynamic (combined) base shear, the Static base shear and the Design base shear,
which is the larger from of the previous values. The engineer may edit the value of
the design base shear. If the design base shear is different from the dynamic base
shear, EngSolutions RCB automatically scales the combined shears for all stories.
The design base shear for the example structure are: Vx = 731 kip and Vy = 590
kip.

• Click Next >>. Click Next >> again to accept the default values of accidental
eccentricity, which are the values specified in the selected seismic code (For ASCE
7-05, accidental torsion is 5% of the corresponding building dimension).

• A window is displayed asking which method to use to compute the center of rigidity
of each floor level. Select the option based on the fundamental mode shapes, and
click OK.

• Click OK to accept the default definitions of design eccentricity, which is the
appropriate for the selected seismic code. The design eccentricity is defined in terms
of the static (inherent) eccentricity (es distance from the center of mass to the center
of torsion), and the accidental eccentricity (δε). For ASCE 7-05 the design
eccentricities are: es + δε and es - δε.

• A table is displayed showing for the first definition of design eccentricity (es + δε), the
following data for each story and for each direction of earthquake loading: center of
mass, static (inherent) eccentricity, accidental eccentricity, and design eccentricity.

• Click Next >> to display the above data for the second definition of design
eccentricity (es - δε).

• Click Next >> to generate load case EQX. The program draws combined nodal
forces and displays a table showing for each story the resultant dynamic force,
accumulated shear, and accidental torsion. When the actual analysis is conducted,
the program solves the model for these combined forces, and based on the results,
establishes initial values and signs for displacements and element internal forces.
Then the program establishes the actual result envelopes from the spectral analysis.

• Click Next >> to generate load case EQY. The program draws combined nodal
forces and displays a table showing for each story the resultant dynamic force,
accumulated shear, and accidental torsion. When the actual analysis is conducted,
the program solves the model for these combined forces, and based on the results,
establishes initial values and signs for displacements and element internal forces.
Then the program establishes the actual result envelopes from the spectral analysis.

• The program produces a report with a summary of the earthquake loading definition.
This report can be printed with its own Print command, or it can be Saved as either a
text file (*.txt) or as an Eprint file (*.epr), which can latter be printed with program
Eprint. Users of Adobe Acrobat can print the report selecting as printer Adobe PDF,
to create a pdf file.

• Close the Report.
• Save the model.



Analyzing the Structure


To run the analysis

• Activate the Run Analysis command in the Standard toolbar or in the Analysis

menu.

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Guayanita Building, Caracas, Venezuela – Structural Engineer Solarte & Cia. S.A., Colombia

Special RC shear walls

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Orthodox Chapel, Bosque Real, Huixquilucan, Mexico – Structural Engineer Burela & Ortíz S.A. de
C.V.

Special moment-resisting-steel-frame system

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