3D Model

Timber3D Modeling Package Demo Weichiang Pang, Ph.D.Associate ProfessorGlenn Department of Civil EngineeringClemson University

Feb-24-2015

Modeling PackageA Matlab toolbox (a set of functions and gui programs) for modeling wood structures

Consists of three main modules:

guiMSTEWfit: Parameter fitting algorithm for connection and wall hysteresis loops

guiMCASHEW2: 2D shear wall and diaphragm modeling program

Timber3D: 3D building analysis program for lateral load resisting systemStatic pushoverNon-linear time history analysis

Modeling Approach3

Assembly-Level2D Shear Walls and DiaphragmsguiMCASHEW2

Connection-LevelFastener Test DataguiMSTEWfit

Building-LevelTimber3D

Connection-LevelguiMSTEWfit4

Connection Test Data5

Framing NailFraming Member

Modified Stewart Hysteresis (MSTEW) Model6

10 modeling parameters extracted from sheathing nail test data

Connection DatabaseA database of hysteresis parameters or models for sheathing nails, framing nails, hold-downs, anchor bolts and etc.7

guiMSTEWfit Modified Stewart Hysteresis Model Parameter Fitting8

Assembly-LevelguiMCASHEW29

Wall Model10

guiMCASHEW2 Malatb-Cyclic Analysis of SHEar Walls version 211

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guiMCASHEW2 (Cyclic Analysis)Wall Hysteresis LoopsguiMSTEWfit (parameter fitting)

MSTEW Wall Parameters

Example Validation (Pushover)13Figure 5.5: Backbone curves of fully anchored shear walls.

2.44 m (8 ft) 0.61 m (2 ft) 2.44 m (8 ft) 0.61 m (2 ft)

Example Validation (Cyclic)14

Shear Wall Time History Analysis15

Uplift of Framing Members

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Wall Opening Corner Failure

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Building-LevelTimber3D18

27ft24ft20ft

1st Floor Plan2x6 framing DFLExterior wall finisheshorizontal wood sheathingUpper stories interior walls GWB not typical for pre-1970sRenovation with GWB3-story Building with a soft 1st Story

27ft24ft20ft

2nd and 3rd Floor Plan

2x6 framing DFLExterior wall finisheshorizontal wood sheathingUpper stories interior walls GWB not typical for pre-1970sRenovation with GWB3-story Building with a soft 1st Story

Numerical Model FormulationTimber3D Modeling Package

Timber3D Model22

10-parameter Wall Model

Two types of elements:Frame Elements (Frame3D)Link Elements (F2F)

Nonlinear hysteresis models (load history dependent)

Nodal condensation technique (to reduce DOFs)

Static and dynamic time history analyses

Shear Wall Model

floor 2 Frame Elementfloor 1 Frame Element

xyzFrame-to-frame Link Elements(F2F)

xyz

Timber3D Building Model

Kx = Compression only (stud)All other stiffness components are zero

Ky = nonlinear hysteretic shear springAll other stiffness components are zero

xyzFrame-to-frame Link Elements(F2F)

xyz

6-DOF uncoupled F2F springs

Frame ElementsShear Wall Model

Horizontal Wood Sheathing (per foot of wall) 1 x 8 x 8 SPF two 8d nails per stud

Gypsum Wall Board (per foot of wall) gypsum board1-1/4" bugle-head coarse thread screws @ 16 o.c.

van de Lindt, J., Bahmani, P., (2013) , NEES-Soft Cyclic tests of HWS and GWB wood shear walls, Alabama University.

Shape function

Deformation of Master Nodes(Frame Element)Nodal Condensation

xyz

xyzMaster Nodes of Frame Element

Deformation of Slave node (Link Element)Slave Nodes

FEMA P695 Ground Motions

EQ #EQ NameStation NameYearPGA(g)MComponent 1Component 21NorthridgeBeverly Hills19940.526.7MUL009.AT2MUL279.AT22NorthridgeCanyon Country-WLC19940.486.7LOS000.AT2LOS270.AT23Duzce, TurkeyBolu19990.827.1BOL000.AT2BOL090.AT24HectorMine Hector19990.347.1NGA_no_1787_HEC000.AT2NGA_no_1787_HEC090.AT25Imperial ValleyDelta19790.356.5H-DLT262.AT2H-DLT352.AT26Imperial ValleyEI19790.386.5H-E11140.AT2H-E11230.AT27Kobe, JapanNishi-Akashi19950.516.9NIS000.AT2NIS090.AT28Kobe, JapanShin-Osaka19950.246.9SHI000.AT2SHI090.AT29Kocaeli, TurkeyDuzce19990.367.5DZC180.AT2DZC270.AT210Kocaeli, TurkeyArcelik19990.227.5ARC000.AT2ARC090.AT211LandersYermo Fire19920.247.3YER270.AT2YER360.AT212LandersCoolwater SCE19920.427.3CLW-LN.AT2CLW-TR.AT213Loma PrietaCapitola19890.536.9CAP000.AT2CAP090.AT214Loma PrietaGilroy19890.566.9G03000.AT2G03090.AT215Manjil, IranAbbar19900.517.4ABBAR--L.AT2ABBAR--T.AT216Superstition HillsEl19870.366.5B-ICC000.AT2B-ICC090.AT217Superstition HillsPoe19870.456.5B-POE270.AT2B-POE360.AT218Cape MendocinoRio19920.557RIO270.AT2RIO360.AT219Chi-Chi, TaiwanCHY10119990.447.6CHY101-N.AT2CHY101-W.AT220Chi-Chi, TaiwanTaiwan TCU04519990.517.6TCU045-N.AT2TCU045-W.AT221San FernandoLA19710.216.6PEL090.AT2PEL180.AT222Friuli, ItalyTolmezzo19760.356.5A-TMZ000.AT2A-TMZ270.AT2

Pushover Animation

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Example Simulated Response Under Earthquake Loading

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Collapse Simulation