Seismic compliance CE version Campbell comments · 2013-03-22 · Seismic Codes – United States Current Codes IBC – International Building Code, 2009 Adopted throughout U.S. Basis

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WhatWhat‘‘s Shakins Shakin‘‘? ?

Seismic ComplianceSeismic ComplianceLV/MV Product LinesLV/MV Product Lines

Brian CampbellBrian CampbellSenior Product EngineerSenior Product Engineer

Gary GluckGary GluckConsulting Business DeveloperConsulting Business Developer

SiemensSiemens

June 17, 2011June 17, 2011

Region / Sector / Division / DepartmentProtection notice / Copyright notice

Overview

Importance of Seismic Codes

Seismic variables

Siemens compliance levels

OSHPD seismic pre-approvals

Dynamic Shake testing


Tale of 2 Cities – Recent Earthquakes

Port-au-Prince, Haiti Quake M7.3 Moment magnitude scale 222,000 deaths. 300,000 injured 1.3 million made homeless Destroyed Presidential Palace,

National Assembly building 2 major quakes since 1860 Building codes – limited seismic

Santiago, Chile quake

M8.8 Moment magnitude

486 deaths

200,000 homes damaged

So powerful, made earthday1 μ-sec longer

Santiago avg 2 major quakes / year

Building codes – strict seismic


What do your specifications look like for seismic?

If you are using the new CSI formatted specifications, you If you are using the new CSI formatted specifications, you probably have a section that looks like this:probably have a section that looks like this:

This spec section will have some definitions and some This spec section will have some definitions and some requirements for submittals. It may even have a section requirements for submittals. It may even have a section entitled project conditions that looks like the following:entitled project conditions that looks like the following:


The problem with this specification is that it is uses obsolete terms, concepts and data

The balance of this presentation will cover The balance of this presentation will cover what the current building codes require, what the current building codes require, what a manufacturer needs to do in order to what a manufacturer needs to do in order to comply with code, and suggestions for comply with code, and suggestions for updating your specifications.updating your specifications.


Seismic Codes – United States

Current CodesCurrent Codes IBC – International Building Code, 2009 Adopted throughout U.S. Basis for shake table testing

CBC – California Building Code, 2010 Seismic sections – identical to IBC

ASCE – Design Loads for Bldgs, 2010 American Society of Civil Engineers Basis for IBC seismic sections

Obsolete CodesObsolete Codes Regional Codes – merged to create IBC code (2000) BOCA – Building Officials and Code Administrators –

East Coast UBC – Uniform Building Code – West Coast SBC – Standard Building Code – Southeast


Seismic Terms - change over time

IBC 2000 +SBC 1999BOCA 1999

UBC 1997SBC 1991

BOCA 1990Model Codes

Location

Building use

Soil type

Location

Building useLocation

Criteria for

Classification

A, B, C, D, E, FA, B, C, D, EZone 2

Zone 4Classification

Seismic Design Category

Seismic Performance Category

Seismic Zone

In ForceIn ForceObsoleteObsoleteObsoleteObsolete


Obsolete terms

Obsolete terms since 2003Obsolete terms since 2003--IBC introduced:IBC introduced:

Zone 2

Zone 4

Seismic Use Group

Do these terms still show up in your specs/drawings?Do these terms still show up in your specs/drawings?


These building code changes require that specifications that look like this:


Look more like this:

[Manufacturer Seismic Qualification: The low voltage switchboard(s) shall meet and be certified to seismic requirements specified in the [IBC 2009 International Building Code] [CBC 2010 California Building Code] [ASCE American Society of Civil Engineers 7-10].

The low voltage switchboard(s) shall be complaint with IBC 2009 parameters:Building Occupancy Category (as defined in Table 1.1 from ASCE 2010): [I] [II] [III] [IV] Seismic Design Category: [A] [B] [C] [D] [E] [F] Site Class: [A – Hard Rock] [B - Rock] [C – Very dense soil and soft rock] [D –Stiff soil profile] [E – Soft Soil Profile] [F – Soil vulnerable to potential failure or collapse under seismic loading] as defined in IBC 2006 Table 1613.5.2 Site Class DefinitionsIp – Importance Factor: [1.5 – Components must function after an earthquake for life safety purposes (Building Occupancy Code IV)] [1.0 – Non-essential buildings. Function not life critical. (Building Occupancy Code I and II)]Ss – Mapped Spectral Accelerations for Short Periods at 0.2 seconds – [239%g] [300%g – for RCS rear connected switchboards only]Sds – 5% Damped Design Spectral Response Accelerations for Short Periods at 0.2 seconds – [XXXX]


Calculate design earthquake Forces - ASCE

FFpp = design Force= design Force

Occupancy Category, Bldg

function Ip = Importance

factor

Site class = soil properties

Bldg height & mounting floor

Wp = Weight of product

SS = Spectral accel, design earthquake

Fp = (.4) (.67) SS Wp Ip

2.5Mounted @ ground level Site Class D


IBC - Building Use

Occupancy CategoryOccupancy Category 1 – Low hazard to human life. Storage, temp facility 2 – Average hazard to human life. 3 – Substantial hazard. > 300 people. School, Factory, etc. 4 – Essential, human life critical. Hospital, fire station,

emergency center, aviation traffic, etc.

IIPP -- Importance factorImportance factor

IP = 1.5, component must function after earthquake life-safety purpose All Occupancy Category 4 bldgs Example: SWBD in hospital

IP = 1.0, non-essential bldgs. Function not critical


IBC - Site Class

A, B, C, D, E, Fbased on soil type

used during design of structure

Site Class A hard rock

Site Class D stiff soil, most common

Site Class F peat, loose soils


Seismic Design Category

A, B, C, A, B, C, DD, E, F , E, F

Inputs to Seismic Design Category:Inputs to Seismic Design Category:

Location

Building Use (Occupancy Category)

Soil Type (Site Class)


Seismic Design Category Graphically

Seismic Design Seismic Design CategoryCategory

SS = Spectral accel, design earthquake

This is essentially what constituted the old This is essentially what constituted the old Zone 4Zone 4


Switchboard frame strengthened for Seismic

Seismic frame Corner Gussets added

Non-seismic frame

Siemens Siemens drawings drawings will show will show the boltthe bolt--down down pattern. An pattern. An engineer engineer will still will still need to need to perform perform calcs for calcs for torque torque valuesvalues


Seismic Spectral acceleration Maximum Considered Earthquake


Seismic Spectral acceleration Maximum Considered Earthquake

SS = 2.90g Mapped Max considered earthquake (California)

SDS = 1.93g Seismic design spectral accel, short period (0.2 sec)


SDS Seismic design spectral acceleration, short period (0.2 sec)

For high seismic zones:For high seismic zones:

SSDSDS = 0.67 * S= 0.67 * SS S (Mapped Max considered earthquake)(Mapped Max considered earthquake)

California Maximum SCalifornia Maximum SDSDS = 1.93g(this value varies greatly across = 1.93g(this value varies greatly across the state!!)the state!!) Proposed changes to 2012Proposed changes to 2012--IBC would increase SIBC would increase SDS DS up to 2.49g up to 2.49g

in California!in California!

SSDSDS values values -- shown in Compliance Documentshown in Compliance Document

DO NOT SPECIFY SDO NOT SPECIFY SDS DS = 1.93 FOR CONVENIENCE!!! = 1.93 FOR CONVENIENCE!!!

THIS WILL UNECESSARILY ADD COST TO YOUR PROJECT. USE THE THIS WILL UNECESSARILY ADD COST TO YOUR PROJECT. USE THE VALUE APPROPRIATE FOR YOUR PROJECT LOCATION!!!VALUE APPROPRIATE FOR YOUR PROJECT LOCATION!!!


Specific Seismic Hazard information is available on the USGS website.

For this example, Beverly Hills is chosenFor this example, Beverly Hills is chosen

First, calculate SFirst, calculate Sss

http://earthquake.usgs.gov/hazards/designmaps/javacalc.phphttp://earthquake.usgs.gov/hazards/designmaps/javacalc.php


We can now calculate SWe can now calculate SDSDS


This pop up window will appear. Once you click OK, the This pop up window will appear. Once you click OK, the values shown will update the previously viewed tablevalues shown will update the previously viewed table

Choose Site Class Choose Site Class (A, B, C, D, E, F)(A, B, C, D, E, F)

““DD”” most commonmost common


This is the This is the value that value that the the SDsSDs of of the the equipment equipment must must exceed.exceed.

This is the This is the SdsSdsvalue that our value that our equipment must equipment must exceed in order exceed in order to comply with to comply with IBC2009IBC2009

http://earthquake.usgs.gov/hazards/designmaps/javacalc.phphttp://earthquake.usgs.gov/hazards/designmaps/javacalc.php


LV Seismic Compliance


BTLV Seismic Compliance – 2009 IBC

Seismic brochures for all Siemens LV equipment: http://www.sea.siemens.com/us/Products/PowerDistribution/Product/WL-Low-Voltage-Switchgear/Pages/WL-LV-Switchgear-Technical-Overview.aspx

Superseded StandardsSuperseded Standards


OSHPD


Shake Table Testing

10 x 10 hexagon table10 x 10 hexagon table

Independent triIndependent tri--axial systemaxial system

Pittsburgh, PAPittsburgh, PA


Input Motions

Resonant Frequency Search – sweep 1 to 33 Hz

Input Motion – 3 axes separately (X, Y, Z)

STAY AWAY STAY AWAY FROM FROM 60HZ!!60HZ!!


Essential buildings Ip = 1.5 (Hospitals, etc)

Elect. equipment - remain operable following seismic test

Anchoring system intact

No life-safety hazard due to collapse or subassembly separation

Minor structural damage in frame - allowed

non-Essential buildings Ip = 1.0

Equip. operable or not operable, following seismic test

Anchoring system intact

No life-safety hazard due to collapse or subassembly separation

Minor structural damage in frame - allowed

Criteria to Pass Seismic Test


A.Manufacturer Seismic Qualification: The low voltage switchboard(s) shall meet and be certified to seismic

requirements specified in the CBC 2010 California Building Code.

What should your specifications look like?What should your specifications look like?

Building Occupancy Category (as defined in Table 1.1 from ASCE 2010): [I] [II] [III] [IV]

The low voltage switchboard(s) shall be compliant with IBC 2009 parameters:

Seismic Design Category: [A] [B] [C] [D] [E] [F]

1.1. The low voltage The low voltage switchboard(sswitchboard(s) shall be compliant with IBC 2009 ) shall be compliant with IBC 2009 parametersparameters


c. Site Class: [A – Hard Rock] [B - Rock] [C – Very dense soil and soft rock] [D – Stiff soil profile] [E – Soft Soil Profile] [F – Soil vulnerable to potential failure or collapse under seismic loading] as defined in IBC 2006 Table 1613.5.2 Site Class Definitions

e. Sds – 5% Damped Design Spectral Response Accelerations for Short Periods at 0.2 seconds –xxxx (Location Specific, may be available from architect or can be derived from USGS application)

d. Ip – Importance Factor: [1.5 – Components must function after an earthquake for life safety purposes (Building Occupancy Category IV)] [1.0 – Non-essential buildings. Function not life critical. (Building Occupancy Category I and II)]


Q&A

Questions?

Gary GluckGary Gluck

Consulting Business DeveloperConsulting Business Developer

BTLV BTLV –– Southern CASouthern CA

[email protected]@siemens.com

Phone 818Phone 818--321321--37693769