Masonry Structures - Federal Emergency Management Agency

362 Pages·2014·19.74 MB·English

by  Richard E. Klingner

Masonry Structures
Includes materials originally developed by
Richard Klingner, PE, PhD
Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 1
SEISMIC DESIGN OF MASONRY
STRUCTURES
Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 2
NEHRP Recommended Provisions
Masonry Structures:
● ●
Context in the Provisions Shear wall in-plane design
● ●
Reference standards Masonry walls out-of-plane
● ●
Masonry basics Overstrength concepts
● ●
Masonry behavior Details
● ●
Organization of TMS 402 Simplified design for wall-
Code type structures
● ●
Types of shear walls Shear wall design example

Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 3
Objectives of Module
●
Basics of masonry behavior
●
The TMS 402 Building Code and TMS 602 Specification
and the relationship of NEHRP Recommended
Provisions documents to it
●
Earthquake design of masonry structures and
components using the 2008 TMS 402 Code and TMS
602 Specification
●
Example of masonry shear wall design
Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 4
NEHRP Recommended Provisions
Masonry Design
●
Context in the Provisions

●
Design seismic loads
– Load combinations ASCE 7-10 Ch. 2 & 12
– Loads on structures ASCE 7-10 Ch. 12
– Loads on components
& attachments Chap. 6 ASCE 7-10 Ch. 13
●
Design resistances ASCE 7-10 Ch. 14
– Strength design (mostly references TMS 402-08)

Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 5
NEHRP Recommended Provisions
Masonry Design
●
Basic Documents
●
NEHRP Recommended Provisions
●
ASCE 7-10, Minimum Design Loads for Buildings
and Other Structures
●
TMS 402-8, Building Code Requirements for
Masonry Structures
●
TMS 602-8, Specification for Masonry Structures
●
IBC 2012, International Building code

Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 6
NEHRP Recommended Provisions
Masonry Design
●
Masonry Basics

Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 7
Review Masonry Basics
●
Basic terms
●
Units
●
Mortar
●
Grout
●
Accessory materials
– Reinforcement (may or may not be present),
connectors, flashing, sealants
●
Typical details
Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 8
Basic Terms
head
joints
●
Bond patterns (looking at wall):
bed
joints
Running bond Stack bond
1/3 Running bond Flemish bond
Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 9
Masonry Units
●
Concrete masonry units (CMU):
– Specified by ASTM C 90
– Minimum specified compressive
strength (net area) of 1900 psi
(average)
– Net area is about 55% of gross area
(varies with size)
– Nominal versus specified versus
actual dimensions
– Type I and Type II designations no
longer exist
Instructional Material Complementing FEMA P-751, Design Examples Design of Masonry Structures - 10