ENG1001 Lecture 1: Week 1 Load Paths
30 May 2018
School
Department
Course
Professor
Structural(action
Load…
Axial(compression/tension
Acts%directly%along%axis%of%membs%
of%struc
Bending
Causes%an%applied%moment%abt%an%
axis%perp%to%length%of%memb
>>>%moment%can%be%applied%
directly%OR%when%loads%act%
transversely%to%memb
Shear
=%internal%action%of%trying%to%slide%one%part%
of%a%beam%over%another
Generally%occurs%with%bending,%but%
less%critical
•
Acts%transversely%to%memb
Torque Causes%an%applied%moment%abt%
the%axis%of%membs
Load(path
=%a%route%along%which%the%applied%loads%are%transferred%to%the%support%(ground)
Vary%as%a%functn%of%the%struc
Enables%struc%to%carry%applied%loads%through%to%support,%maintaining%eq%@%every%
pt%along%the%way.%
All%parts%must%be%present,%or%struc%will%collapse
(eg.%for%a%chair,%seat-legs-floor-walls-footings-earth)
Seat%(bending)
•
Legs%(axially%compressing)
•
Floor%(bending)
•
Walls%(axially%compressing)
•
Footings%and%earth%(compressing)
•
Struc… Result Struc(forms
Shortens/lengthens%in%tension%
(pull)%or%compression%(push)
>>>%squashing/stretching
Tensile%axial% load
>>>%memb%lengthens
Compressive%axial% load
>>>%memb%shortens
Arches%(comp)
Trusses%
(tensn/comp)
Cables%(tensn)
Curving Memb%curves
Sets%up%internal%bending%
moments%in%memb
Beams
Distorting Sets%up%internal%shear%
forces%in%memb
Beams
Twisting -
Week$1:$Load$Paths
Saturday,%22%July%2017
14:34
