In this paper, dynamic energy modelling that considers the complexity within the green roof layers is adopted to guide policy makers in China on the relationship between using specific thicknesses of roof insulation against green roof layers.
In the case of green roof designs, it is essential that the assessment mechanisms should not ignore the complex heat and moisture balances within the green roof layers.
The study led to suggestions of modifications in the design of the roof layers, which are out of the scope of present paper.
Three experimental green roof platforms (1 m × 2 m) with heated boxes and three identical bare roof platforms (without substrate, vegetation and other green roof layers) were equipped with thermocouples that continuously measured a vertical temperature profile through the roofs.
The individual and joint contribution of the non-living green roof layers, namely soil, rockwool (water storage) and plastic drainage layers, to thermal performance of green roof has seldom been assessed.
As a result, temperature variations of different roof layers during the day and night time were recorded and the thermal isolation effect of the water-reserved roof against the building internal space was assessed.
The United States had developed a classification system for coal measures, called CMRR Coal Mine Roof Ratingg), which involves following affecting factors: stratified thickness of immediate roof, shear strength of weak plane, rock compressive strength, number of roof layers, rock sensitivity to water, water content, and so on.
The research conducted on seismic hazard in Borynia-Zofiowka-Jastrzebie Ruch Zofiowka colliery in Poland exposed that the tremors were caused by displacement of roof layers over a selected goaf space as well as natural stresses in the rock mass originated from the fault zones in the vicinity of considered longwall (Stec 2015).
Instead, it has congealed into more of the same old, same old — on the ground, pedestrians pick their way on narrow icy paths through cinder-caked mounds of snow; on the roofs, layers of ice and snow create ice dams that can back up underneath shingles and lead to cracks, leaks and cave-ins.
Molecular dynamics (MD) simulations are performed to investigate the roof-layer effect on damping behavior and structural deformation of the coated and uncoated VACNTs under nanoindentation.
