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SALSA FLORENCE & HUTCHESON LEE SEWELL, PE, SE

SALSA

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SALSA. FLORENCE & HUTCHESON LEE SEWELL, PE, SE. WHAT IS SALSA?. SIGNAL AND LIGHTING STRUCTURAL ANAYLSIS (SALSA ) ANALYZES WIRE SPAN, MAST ARM AND HIGH MAST STRUCTURES. HISTORY OF PROJECT. STARTED IN 2007 EXPAND ON EARLIER GEOTECHNICAL EVALUATIONS DONE BY DARRIN BECKETT IN 2004. - PowerPoint PPT Presentation

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Page 1: SALSA

SALSAFLORENCE & HUTCHESON

LEE SEWELL, PE, SE

Page 2: SALSA

SIGNAL AND LIGHTING STRUCTURAL ANAYLSIS (SALSA)

ANALYZES WIRE SPAN, MAST ARM AND HIGH MAST STRUCTURES

WHAT IS SALSA?

Page 3: SALSA

STARTED IN 2007◦ EXPAND ON EARLIER GEOTECHNICAL

EVALUATIONS DONE BY DARRIN BECKETT IN 2004. AT THE TIME, POLE BASES DIDN’T HAVE

DOCUMENTED DESIGN.◦ 10FT BASE

BRING THE DESIGN UP TO CURRENT CODE.◦ AASHTO STANDARD SPECIFICATIONS FOR

STRUCTURAL SUPPORTS FOR HIGHWAY SIGNS, LUMINAIRES AND TRAFFIC SIGNALS.

HISTORY OF PROJECT

Page 4: SALSA

REMOVE THE NEED FOR PERFORMING SITE-SPECIFIC GEOTECHNICAL INVESTIGATIONS.

CHALLENGES◦ ENCOMPASS ALL TYPES OF SOIL THAT COULD BE

ENCOUNTERED◦ CONSERVATISM

HISTORY OF PROJECT

Page 5: SALSA

MODELED FOUNDATIONS UNDER VARYING SOIL AND SLOPE CONDITIONS.◦ COHESIVE AND COHESIONLESS SOILS AND ROCK

COHESION = 1 KSF FRICTION ANGLE = 30 DEG

◦ 3:1, 2:1, 1.5:1

HISTORY OF PROJECT

Page 6: SALSA

DIAMETER◦ DRIVEN BY ANCHOR BOLT CIRCLE OF POLES

36” MAST ARM AND WIRE SPAN POLES 48” HIGH MAST

EMBEDMENT (AASHTO 13.6.1)◦ BROMS DESIGN METHOD

BASED ON ULTIMATE STRENGTH DESIGN, SO SAFETY FACTORS ARE APPLIED TO SHEARS AND MOMENTS.

DRILLED SHAFT DESIGN

Page 7: SALSA

◦ BROMS DESIGN METHOD◦ SAFETY FACTORS (AASHTO RECOMMENDS)

UNDERCAPACITY FACTOR OF SOIL: 0.7 OVERLOAD FACTOR FOR LOADINGS: 3 SAFETY FACTOR = 4.3

◦ THE HIGH SAFETY FACTORS WERE AGREED ON BY THE GEOTECHNICAL DEPARTMENT DUE TO THE UNCERTAINTY OF THE TYPE OF SOIL.

DRILLED SHAFT DESIGN

Page 8: SALSA

DESIGN TABLE DEVELOPED

DRILLED SHAFT DESIGN

Page 9: SALSA

AASHTO SECTION 3: LOADS◦ OUTLINES LOADING ON POLES AND

ATTACHMENTS SALSA IS USED TO FIND LOADS ON POLE

BASES

POLE BASE LOADS

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SALSA

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ANALYZES WIRE SPAN, MAST ARM AND HIGH MAST STRUCTURES

MAST ARM AND HIGH MAST LOADS ARE FOUND BY SIMPLE STATICS

SPAN WIRE ANAYLSIS◦ DETAILED METHOD OF ANALYSIS ◦ AASHTO A8

SALSA

Page 12: SALSA

MAST ARM AND HIGH MAST◦ LOADING FOR BASE DESIGN

WIRE SPAN◦ LOADING FOR BASE DESIGN◦ LOADING FOR POLE SELECTION FROM STORAGE

YARD

SALSA

Page 13: SALSA

WIRE SPAN POLE SELECTION◦ PREVIOUS DESIGN

IN-HOUSE SPREADSHEET FOR WIRE SPAN STRUCTURES NEGLECTED WIND AND ICE LOADS

◦ SALSA CALCULATES MOMENTS COMPARES THEM TO THE

ALLOWABLE MOMENTS FOR POLES IN THE YARD.

SALSA

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PROBLEMS◦ EXCEL COMPATIBLITY◦ DELIVERY◦ LIMITATIONS

SALSA

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MOVING TO A WEB BASED APPLICATION

FUTURE OF SALSA

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WEB BASED ADVANTAGES◦ GREATER ACCESS ◦ FILE SHARING◦ UPDATES ARE SEAMLESS◦ MORE USER FRIENDLY

FUTURE OF SALSA

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POSSIBLE ADVANCEMENTS◦ STATEWIDE SOIL PROFILING◦ ADDITIONAL FEATURES

POLE BASE VOLUME CALCULATOR ATTACHMENT HEIGHT PLACEMENT

FUTURE OF SALSA

Page 18: SALSA

QUESTIONS???