Search

Reported in this paper is an evaluation of structural and functional performance of heavy duty and light duty pavements by addressing the effects of several factors on the rate of pavement deterioration. The sample used herein is a network of freeways and arterials from Victoria/Australia covering four road classes, namely M, A, B and C. The first two road classes represent heavy duty pavement and the last two road classes represent light duty pavements. These road classes differ in qualities, functions, duties, geometric standards, and traffic volumes and loadings. This paper aims to assess the performance of the four road classes by comparing their pavement conditions and environmental factors affecting the rate of pavement deterioration. More than 2300 kilometers of road length was selected from 40 highway sections to reflect Victoria's network conditions. The parameters considered for assessing road performance were traffic loading, pavement strength, and environmental factors. Hierarchical linear regression analysis was used to explore the significance of different predictor variables for all road classes. The study confirms that the rate of roughness and rutting progression per year for all road classes is very close, and the environmental factors affect roughness and rutting progressions for light duty pavements only. [ABSTRACT FROM AUTHOR]

Volumetric prefabricated building construction is growing in most developed countries; for example, in Sweden the market share of prefabricated building systems in the housing industry was more than 80%. However, in Australia only approximately 3–4% of new building constructions are prefabricated buildings in a year. A major hindrance to the growth of prefab construction in Australia is that systems are developed under commercial and confidential conditions. There are limited publicly-available research and case studies for certifiers, regulators, engineers and academia to provide independent information on the performance, advantages and disadvantages of prefabricated building systems. Independent designers and structural engineers are relying on the strength of the structural and non-structural element, as well as the connections of the prefabricated building systems. This strength is estimated from the "commercial-in-confidence" test of individual components by manufactures, and it might result in undesired outcomes in design. This paper provides an overview of available literature on structural performance, benefits, constraints and challenges of prefabricated building systems. This paper also highlights the research needed on the prefabricated building systems such as full-scale tests, numerical modelling, hybrid simulations, case studies and social and economic assessments. Being supported by sound academic research will increase the market demand for prefabricated building systems in Australia as well as in other countries. [ABSTRACT FROM AUTHOR]