Building Structures 1

#8

Antonín Lupíšek

Drawing #1: 3 variants of load bearing column system

with location of expansion joints

• scale 1:500 or 1:200

• dimensioning of expansion joints sections

• description of expansion joints

Drawing #2: part of plan and section in location of

expansion joint

• scale 1:100

#1 example

#1 example

Drawing #2 Example

Types of expansion joints 1

Volume changes

• temperature fluctulation

• moisture fluctulation (wooden structures)

• concrete shrinkage and creep

• chemical changes of materials

Types of expansion joints 2

Settlement joints (differential settlement)

• diverse subsoil

• different foundation loading

• different foundation type

• additional building (different time of realization)

Types of expansion joints 3

• Vibration transfer precaution (crane, lift)

• Other construction and/or technological

reasons

EXPANSION JOINTS FOR VOLUME CHANGES

EXPANSION JOINTS ENABLING DIFFERENTIAL

SETTLEMENT

must continuously go through all load-bearing and all

connected non-load-bearing structures

with exception of foundation.

must continuously go through all load-bearing and all

connected non-load-bearing structures

including foundation.

Thermal linear expansion

l = l α t

l ... linear expansion [m]

l ... element length [m]

α ... coefficient of linear expansion

12 * 10-6 K-1

t ... thermal variation (~ 35°C)

maximum expansion joint width 10 - 30 mm

l = l α t = ... < 30 mm

Location of expansion joints

• change of shape

• bearing system orientation change

• different heights of buildings

• different loading

• heated / unheated part

Location of expansion joints

Principles of solution

• doubled structure

• one side movable support

• simply supported inner part

• cantilever structure

• shift of modular grid of load-bearing structure

Location of expansion joints

BUS1 | Antonín Lupíšek | antonin.lupisek@fsv.cvut.cz | http://bus1.lupisek.com

Examples

Examples

Examples

Examples

Task 1 - Drawing basics

• part of plan and section of typical floor

Task 2 - Load-bearing system

• 2 variants of structural system

• 2 variants of floor structures (formwork,

precasted structure)

• 2 complex details according to selected

bearing system

Task 3 - Expansion joints of load-bearing

structures

• 3 variants of load-bearing system with location

of expansion joints

• part of plan and section in location of

expansion joint credit in

your index

Thanks for attention