Hierarchical Co-Segmentation of Building Facades

2014 ◽  
Author(s):  
Andelo Martinovic ◽  
Luc Van Gool
Keyword(s):  
Building Facades

A STUDY ON HEAT OUTPUT FOR JIS A 1310 “TEST METHOD FOR FIRE PROPAGATION OVER BUILDING FAÇADES”

2018 ◽  
Vol 83 (753) ◽  
pp. 851-860
Author(s):  
Yuhei NISHIO ◽  
Takafumi NOGUCHI ◽  
Hideki YOSHIOKA ◽  
Manabu KANEMATSU
Keyword(s):  
Test Method ◽  
Heat Output ◽  
Fire Propagation ◽  
Building Facades

scholarly journals Thermodynamic and Kinetic Characteristics of Combustion of Discrete Polymethyl Methacrylate Plates with Different Spacings in Concave Building Facades

Polymers ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 167
Author(s):  
Weiguang An ◽  
Lujun Peng ◽  
Minglun Cai ◽  
Kaiyang Hu ◽  
Song Li ◽  
...  
Keyword(s):  
Polymethyl Methacrylate ◽  
Flame Spread ◽  
Structure Factor ◽  
Turning Point ◽  
Fire Risk ◽  
Flame Height ◽  
Hazard Evaluation ◽  
Spread Rate ◽  
Building Facades ◽  
Flame Spread Rate

Polymethyl methacrylate plates are widely applied to buildings, producing significant fire hazards. It lacks a theoretical basis for the fire risk assessment of polymethyl methacrylate in concave building facades. Therefore, experimental methods are used to investigate combustion characteristics of discrete polymethyl methacrylate plates in a concave building facade. Influences of fuel coverage and structure factor are investigated, which is scant in previous works. When structure factor is invariable, average flame height increases first and then decreases as fuel coverage increases, and the turning point is between 0.64 and 0.76. In total, three different patterns of pyrolysis front propagation are first observed for different fuel coverages. Flame spread rate first increases and then decreases as fuel coverage rises, and the turning point is also between 0.64 and 0.76. When fuel coverage is invariable, the flame spread rate first increases and then decreases with increasing structure factor, and the turning point is 1.2. A model for predicting the flame spread rate of discrete polymethyl methacrylate is also developed. The predicted values are consistent with experimental results. Fuel spread rate of discrete polymethyl methacrylate rises as the fuel coverage increases. The above results are beneficial for thermal hazard evaluation and fire safety design of polymethyl methacrylate used in buildings.

Thermography evaluation strategy proposal due moisture damage on building facades

2021 ◽  
pp. 102555
Author(s):  
Maria Teresa Gomes Barbosa ◽  
Vicente Junio Rosse ◽  
Naíra Gaudereto Laurindo
Keyword(s):  
Moisture Damage ◽  
Evaluation Strategy ◽  
Building Facades

Airborne Algal growth on roofs of membrane-structured residences in cold area of Japan

2020 ◽  
pp. 174425912098003
Author(s):  
Makiko Nakajima ◽  
Daisuke Masueda ◽  
Shuichi Hokoi ◽  
Takayuki Matsushita
Keyword(s):  
Algal Growth ◽  
Residential Building ◽  
Growth Conditions ◽  
Building Structure ◽  
Transparent Film ◽  
Cold Region ◽  
Algal Population ◽  
Building Facades ◽  
Cold Area ◽  
Survey Results

The discoloration of building facades due to airborne algae is observed in our surroundings. The growth conditions of these algae are not yet fully understood, and efficient measures for preventing the growth of the algae are not presently available. The objective of this study was to investigate the effects of the ambient environment and building structure on algal growth. A residential building in a cold region of Japan was surveyed. The roof was a multi-layered structure comprising a semi-transparent film, an air layer, and a layer of insulation from the outside, supported by rafters. The soiled state was visually observed by taking photographs. On the northeast (NE) and northwest (NW) roofs, several black stripes appeared 4 months after cleaning. The soiling increased in the spring and autumn. The soiling first appeared on the film backed by the rafter and then extended to the film backed by the air layer. The condensation time during the day in the rafter part was longer than that in the air-layer part. Condensation occurred during the night, but its frequency exhibited no dependence on the orientation of the roof. Algae tend to die when exposed to an environment with a temperature higher than 45°C. The NE roof had the shortest period with a surface temperature of >45°C. These measurements agreed well with the survey results, which indicated that the soiling mainly occurred on the NE and NW sides of the roofs. The time for algal growth was estimated under the assumption that algae can grow at surface temperatures ranging from 0 to 45°C, in agreement with the observed soiling. The observed soiling changes were well explained by the algal population calculated via a growth predictive model according to the algal temperature and relative humidity.

scholarly journals Modeling of non-standard geometry of energy-efficient building facades

2019 ◽  
Vol 91 ◽  
pp. 05024
Author(s):  
Natalia Knyazeva ◽  
Vladislav Larin
Keyword(s):  
Energy Efficient ◽  
Construction Projects ◽  
Parametric Modeling ◽  
Labor Costs ◽  
Building Facades ◽  
Standard Geometry ◽  
Energy Efficient Building ◽  
Standard Solutions

This article describes the approach of parametric modeling using modern software. This decision should help to change the already established rules for building BIM models. This approach became the basis of the idea of using parametric modeling for two main groups in the modern modeling of construction projects: modeling of the architectural appearance of the building and structures. This method can significantly reduce labor costs, and it also can be used to implement non-standard solutions in the design energy-efficient building facades.

scholarly journals Evaluating the Effects of Façade Greening on Human Bioclimate in a Complex Urban Environment

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Britta Jänicke ◽  
Fred Meier ◽  
Marie-Therese Hoelscher ◽  
Dieter Scherer
Keyword(s):  
Heat Stress ◽  
Short Wave ◽  
Wave Radiation ◽  
Short Wave Radiation ◽  
Long Wave ◽  
Building Facades ◽  
Urban Heat ◽  
The Mean ◽  
Human Bioclimate ◽  
Radiant Temperature

The evaluation of the effectiveness of countermeasures for a reduction of urban heat stress, such as façade greening, is challenging due to lacking transferability of results from one location to another. Furthermore, complex variables such as the mean radiant temperature(Tmrt)are necessary to assess outdoor human bioclimate. We observedTmrtin front of a building façade in Berlin, Germany, which is half-greened while the other part is bare.Tmrtwas reduced (mean 2 K) in front of the greened compared to the bare façade. To overcome observational shortcomings, we applied the microscale models ENVI-met, RayMan, and SOLWEIG. We evaluated these models based on observations. Our results show thatTmrt(MD = −1.93 K) and downward short-wave radiation (MD = 14.39 W/m2) were sufficiently simulated in contrast to upward short-wave and long-wave radiation. Finally, we compare the simulated reduction ofTmrtwith the observed one in front of the façade greening, showing that the models were not able to simulate the effects of façade greening with the applied settings. Our results reveal that façade greening contributes only slightly to a reduction of heat stress in front of building façades.

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