Home » Civil Engineering » STOCHASTIC ASSESSMENT OF NIGERIAN TIMBERS FOR BRIDGE DECKS IN ACCORDANCE TO AASH...
STOCHASTIC ASSESSMENT OF NIGERIAN TIMBERS FOR BRIDGE DECKS IN ACCORDANCE TO AASHTO LFRD
Sold By: Joe Project Store | Item Type: Project Material | Report this? | Attributes: 65 pages | 1-5 chapters | Amount: ₦5,000 | Marked useful: 4,298 times
Delivery: Within 24 hoursABSTRACT
This work provides results for stochastic safetyevaluation of Nigerian timbers for bridge decks in accordance to American Association of State Transportation and Highway Officials (AASHTO) Load Resistance Factored Design (LRFD) design specifications.A timber bridge is modeled in accordance to AASHTO LRFD, 2010, to represent real life experiment in order to depict the structural behavior of planks when used as a bridge deck. This model was then subjected to some degree of entropy using Advanced Second Moment Reliability Assessment (ASMRA) method, which was subsequently analysed using JAVA library with the help of Flanagan polynomial.Experimental data collected from literature was comparedwith the current Nigerian Code of Practice, NCP 2, 1973 for timber, and were used for the assessment. It was observed that, strength classes, timber thicknesses and stringer spacing are the major factors among others influencing the structural behavior of Nigerian timber proposed as bridge decks. Therefore, the major classes of Nigerian timber recommended for bridge decks are timber within the strength classes N1 to N4 with dimensions ranging from 100 x 250mm to 150 x 300mm on stringers spaced not greater than 300mm, depending on the strength class adopted; with timber belonging to the higher strength classes taking the lower dimension. An exception to this, are timber which belong to the strength class N1, where the stringers can be spaced at 450mm using timber with dimension not lower then 100mm thick and width not less than 250mm.The recommended strength classes with associated material properties can be a source of sustainable bridge deck material over a reasonable period of time as indicated by the probability of failure as a result of damage due to load accumulation. In view of this, timber which is a locally available material can be used as substitute for the expensive concrete and steel which are the most commonly used materials.
CHAPTER 1
INTRODUCTION
1.1 GENERAL OVER VIEW
The need for local content in construction of engineering infrastructure is now a serious engineering challenge in Nigeria. This is because vast quantities of local raw materials, which must be processed and used for cost effective construction abound. Construction activities based on these locally available raw materials are major steps towards industrialisation and economic independence for developing countries (Aguwa and Sadiku, 2011).
Timber is one of the natural occurring raw materials which abound in Nigeria and it had been put to use as a building material for construction since prehistoric times. It is available inlarge quantities in the forested parts of the country. The extent of its usage by professionals in the buildingindustry is determined not only by their understanding of the material, but also by their perception of thematerial (Adedeji and Ogunsote, 2004).
The major use of timber in Nigeria and most part of the third world has been limited to domestic use as an alternative source of heat energy or household kitchen appliance. In this respect, timber which is supposed to be used to sustain the development of the economy is been burnt as coal. With critical analysis of our environment and careful exploration of the structural properties of timber, one can adequately establish and design an environmentally friendly structure which is cost effective.
This material content is developed to serve as a GUIDE for students to conduct academic research
Find What You Want By Category:
Delivery: Within 24 hours
Advertise Here
For advertisement, call 08168958821
Not what you were looking for? Perform a search
What's your project topic?
Comment on Facebook:
Related Project Materials
- 1.
COMPARATIVE ANALYSIS OF THE STRENGTH OF CONCRETES MADE FROM VARIOUS AGGREGATE
COMPARATIVE ANALYSIS OF THE STRENGTH OF CONCRETE MADE FROM VARIOUS AGGREGATE CHAPTER ONE INTRODUCTION This work was to present in one weight, the fund...More »
Item Type: Project Material | 52 pages | 2,501 engagements |
- 2.
BUILDING COST MANAGEMENTS
CHAPTER ONE INTRODUCTION 1.1 Background to the Study Approaches to the total cost management of construction works are now changing rapid...More »
Item Type: Project Material | 53 pages | 2,205 engagements |
- 3.
AWARENESS AND PRACTICES OF GREEN CONSTRUCTION
AWARENESS AND PRACTICE OF GREEN CONSTRUCTION CHAPTER ONE INTRODUCTION 1.1 Background to study. Green or Sustainable buildings are the future and w...More »
Item Type: Project Material | 60 pages | 2,047 engagements |
- 4.
EFFECT OF THE USE OF SUB-STANDARD MATERIALS ON BUILDING CONSTRUCTION (CASE STUDY OF MINISTRY OF HOUS...
EFFECT OF THE USE OF SUB STANDARD MATERIALS ON BUILDING CONSTRUCTION (CASE STUDY OF MINISTRY OF HOUSING, LAGOS STATE) CHAPTER ONE INTRODUCTION 1.1 ...More »
Item Type: Project Material | 53 pages | 3,497 engagements |
- 5.
BUILDING COLLAPSE : A CHALLENGE FOR THE REAL ESTATE INDUSTRY AND CONSTRUCTION COMPANIES IN NIGERIA
CHAPTER ONE INTRODUCTION 1.1 Background of the study Incidences of the fall of buildings in Nigeria are posing major concerns and challenge to all ...More »
Item Type: Project Material | 53 pages | 2,587 engagements |
- 6.
EFFECTIVENESS OF QUALITY ASSURANCE STRATEGIES IN PROJECT EXECUTION (A STUDY OF ROAD CONSTRUCTION PR...
EFFECTIVENESS OF QUALITY ASSURANCE STRATEGIES IN PROJECT EXECUTION (A STUDY OF ROAD CONSTRUCTION PROJECTS IN OWERRI) CHAPTER ONE INTRODUCTION 1.1 Back...More »
Item Type: Project Material | 51 pages | 9,623 engagements |