Anchor Presentation Hilti 2011.pdf

1www.hilti.com.hk MOHK Anchor 2011

Anchor Fastening Workshop 2011

Hilti (Hong Kong) Limited


Agenda

Hilti in brief

Anchoring Technology

Code & Standard Development Worldwide

Anchor Product Testing

Hilti FTM 2011 & Profis Anchor Ver. 2.1.x (Work example)

Hilti Products / Application overview


Hilti in brief

Liechtenstein

Area = 160 km2Population = 35000 (over 1500 Hilti employee)

Hilti AG (Founded in 1941)

Operate in 120 countries20000 employee worldwide

Factory in Liechtenstein, Germany, Austria, Hungary, Mexico, India, China, USA,


Anchor Technology


The 3 Working Principles - Definition

Friction Keying Bonding

The anchor expands into the concrete and is kept by friction

At a certain point the anchor has a bigger diameter then the borehole itself

Bonding occurs with chemical anchors; a micro keying effect keeps the element in the borehole


Load

Displacement

Rigid type anchors

Displacement-controlled anchor

Adhesive anchor, Plastic Anchor

Anchor Design Resistance

Characteristic Resistance (Ultimate Resistance)

Load

Factor of

Safety

(FOS)

Follow-up expansion

Torque-controlled anchor

Undercut anchor

(e.g. HSL,HST, HSA, HDA, HSC)


Less sensitive to bore hole Less sensitive to bore hole conditionsconditions

Less sensitive to temperatureLess sensitive to temperature

No curing time necessaryNo curing time necessary(immediate application of load)(immediate application of load)

Higher Spacing & Edge distanceHigher Spacing & Edge distancerequirements requirements

Selection Criteria for Anchors Mechanical Anchor


Very small expansion forces Very small expansion forces (suitable for low strength concrete, (suitable for low strength concrete, brick) brick)

No need to No need to expandexpand the anchorthe anchor

No gap between rod and concreteNo gap between rod and concrete(good for corrosion protection)(good for corrosion protection)

Sensitive to borehole condition & Sensitive to borehole condition & temperaturetemperature

Require Curing TimeRequire Curing Time

Selection Criteria for Anchors Adhesive Anchor


Galvanized5-20

Hot dipped galvanised /

Sherardised

A2 Steel A4 Steel HCR

Enviro

nm

en

tal c

on

ditio

ns

Inside rooms without humidity

Outside only for temporary applications

Damp inside rooms Slightly corrosive

outside atmosphere Occasional exposure to

condensation

Highly corrosive surroundings like road tunnels, indoor swimming pools

Inside rooms with heavy condensation

Outside without chlorides

Low HighCorrosion resistance

Inside rooms with heavy condensation

Outside with moderate chlorides

Environmental conditions Environmental conditions

Selection Criteria for Anchors


Design requirements for tensile loading:

NRd,s = Nominal steel strength in tension

NRd,c = Nominal concrete breakout strength in tension

NRd,p = Nominal pullout/bond strength in tension

Strength design Tension


Embedment depth, hef (in. / mm)

Desi

gn ca

paci

ty,

N (lb

, kN

)

5.1' efcb hcfkN =

befa dhN = pi

utssa FAN =

Relationship between Embedment Depth and

Loading (Chemical Anchor)


Embedment depth, hef (in. / mm)

Desi

gn ca

paci

ty,

N (lb

, kN

)

Relationship between Embedment Depth and

Loading (Chemical Anchor)


The concept of Critical Spacing & Edge Distance

Ideal Case


Nominal concrete breakout strength in tension


VRd,s = Nominal steel strength in shear

VRd,c = Nominal concrete breakout strength in shear

VRd,p = Nominal concrete/bond pryout strength in shear

Strength design Shear

Shear nominal strengths are defined as:


thic

knes

s

1,5

c a1

3 ca1

c a1

1,5 ca1 1,5 ca1

V

AVco = projected failure area at the edge of the concrete resultingfrom a shear load acting on a single anchor

ca1 = distance of anchor to the edge of the concrete in thedirection of the shear load

AVco = ( 3 ca1 ) x ( 1,5 ca1 ) = 4,5 ca12

Nominal concrete breakout strength in shear


Agenda

Hilti in brief








1990sNo common anchor design standard

Late 1990s 2000sETAG (Common assessment for Anchor products)ACI AC193 (pre-qualification test)Hilti C-C Design Method (Simplified version of ETAG Annex C)

2009 CEN / TS 1992 (Post installed Anchor Design)


Product qualificationDesign

Design and product qualification Europe

European Committee for Standardization (CEN)

CEN/TS 1992 4.xDesign of fastenings for

use in concrete

European Organization for Technical Approval (EOTA)

European Technical Approval (ETA) b)

Application

European Technical Approval

Guideline (ETAG)

Common Understanding of

Assessment Procedures (CUAP)

OrganizationGuidelineCode/Standard

Key

Approval

Eurocode 2EN 1992


Agenda

Hilti in brief







Case Study: Scaldfolding Worker fall from 5/F


Case Study: possibility of failure

Local made anchor, No tested data provided- Claimed 20kN performance, actual load = 12kN or less

1. Wrong drill bit (Enlarge 0.5mm) (13mm vs inch)- 4kN = 8kN

3. Did not remove plastering, embedment 20mm- 3kN = 3kN

2. No Torque wrench - 2kN =6kN

4. Shock load (Sudden fall..) + Aged concreteEnd result = Anchor Complete Failure


Why using an Anchor with product certification?

1. ETAG Testing program680+ samples tested with all possible condition!

Tested: Enlarged hole, half torque, over torque, sustained load, cracked concrete, reinforcement contact, repeated load.

2. Hilti Design supportEngineering Team support on calculation, BD submission, technical seminar

3. On site Installation TrainingProfessional installer training on site


Agenda

Hilti in brief







Hilti FTM Fastening Technology Manual


How to Select Suitable Anchors ? Base Material


Product qualification Cracked Testing


How to Select Suitable Anchors ?

Design Resistance VS Factored

Load

Design Resistance has FOS = 1.5

Rec. Load VS Unfactored Load

Rec. Load has FOS =3

Loading Magnitude


Design according to your spacing, edge, based materialDetailed design Tension & Shear

Tension / Shear

(Lowest value)


Combined Tension and Shear Capacity

Tension and Shear Capacity Curve

Shear Utilization (%)

Tension Utilization (%)

100

20

20 100

Anchor Combined Load Capacity Curve (CEN)

Max.combined

capacity: 120%


Agenda

Hilti in brief







HSA | HST stud anchor

HSA

HSA-R

HSA-F

HST

HST-R

HST-HCR


HSA | HST setting operations


Torque-controlled expansion anchor

HSA | HST quality checking and inspectionHead

marking

Afterapplying torque

Beforeapplying torque

Overtorqued

Standard

embedment

Incorrect

setting


Typical ApplicationTypical Application


Injection grouting system

HIT RE500 injection adhesive


Inside the mixer

HIT RE500 injection adhesive


A complete system with

short mixer, re-usable plastic holder and dispensers

MD2500 for 500ml package


HIT RE500 setting operations


4x

HIS-N, HIS-RN sleeves

[M8 - M20]

HAS, HAS-R anchor rods[M8 - M39]

Rebars[ 8 - 40]

(not in Hilti sales program)


Typical Application:

Rebar Fixing, Tower crane fixing


Typical Application 2, non-concrete fixing

Non-concrete

fastening /

Herritage Building


Certificate of

Competency

4000+ certificate issued

since 2005

Certificate of competency

Installation Card

Training


Safety & Productivity

Anchor bolt holds things

can also hold HUMAN LIVES !

Hilti lead the market through three key factors

Safe & Reliable

Product

R&D & ETAG(most reputable approval)

Design it RIGHT

Design

Partnership(professional design adv)

Install it RIGHT

Installation Card(ensure execution)


Q & A

Anchor Presentation Hilti 2011.pdf

Documents

Transcript of Anchor Presentation Hilti 2011.pdf