High-rise Districts Research Articles

Wind characteristics around a skyway bridge of high-rise buildings

To respond the expansion of urban centers, the proliferation of high-rise buildings demands a better understanding of the aerodynamic phenomena around skyway bridges connecting these structures. This analysis, utilizing the advanced computational fluid dynamics verified by wind tunnel test data, investigates the wind characteristics around such bridges, crucial for structural stability, pedestrian comfort, and aerodynamic efficiency. This study focuses on the interactions between a 2 × 2 building array with a building height-to-street width ratio of 30 and a skyway bridge, investigating those factors such as bridge influence, building structures, building height, and bridge position. Using the three-dimensional steady Reynolds-averaged Navier–Stokes equations along with the Reynolds stress model for turbulence closure, the results show that the presence of skyway bridge significantly modifies local wind patterns. Wind speed and turbulence intensity are impacted differently based on the bridge's upstream or downstream settings. Downstream bridges tend to reduce wind speeds due to the sheltering effects, while upstream placement of bridge can enhance wind flow, affecting both the structural design and pedestrian comfort. Additionally, building height variations adjacent to the bridge influence wind velocity and pressure profiles, with taller buildings intensifying wind speeds at lower levels because of the channeling effects. These insights are pivotal for optimizing the skyway bridge designs to improve airflow distribution, enhance environmental sustainability, and ease wind-caused disturbances, offering a guideline for future architectural and urban planning in high-rise districts.

Prospects for development of heat supply systems in high-rise districts

The article analyzes the main advantages and disadvantages of centralized and decentralized heat supply systems in high-rise districts. The main schemes of centralized heat supply systems are considered. They include centralized heat supply from boiler houses, centralized heat supply from autonomous heat sources, heat supply from roof boiler houses and door-to-door heating supply. For each of these variant, the gas distribution systems are considered and analyzed. These systems vary depending on the heat source location. For each of these systems, technical and economic indicators are taken into account, the analysis of which allows choosing the best option for districts where high-rise buildings predominate.

The main directions of increasing the reliability of gas distribution systems in high-rise districts

The main source of energy in the economy is gas fuel. The specific weight of natural gas in the fuel and energy balance is about 50%. †The main requirement for the gas distribution system is to ensure the reliability, safety of this system. One of the ways to improve the reliability of gas supply systems is to use the reliability of automatic equipment to determine the gas contamination of premises. Based on the analysis of calculation formulas, an algorithm for the hydraulic calculation of gas pipelines is compiled. Based on the characteristics of gas distribution systems, it is advisable to apply such a solution, when gas supply of domestic consumers, boiler houses of municipal agricultural enterprises is carried out from the distribution network of high and medium pressure through autonomous combined pressure regulators installed in areas of high-rise buildings.

Increase in Population Density and Aggravation of Social and Psychological Problems in Areas with High-Rise Construction

High-rise apartment houses have technical and economic advantages in areas with dense population. Their placement in the central part of the city allows increasing the number of living space in the limited territory, to bring population to the place of employment and reduce pendular migration. But increase in population density leads to psychological problems: level of a stress, fatigue increases, the number of phobias grows, infectious diseases extend quicker. These problems can be solved at resettlement of inhabitants to the suburb. However such decision leads to aggravation of a transport problem and the pulsing increase in population density in the downtown and on its suburb. To solve a transport problem, it is necessary not to increase the square of the cities. Therefore in the suburbs is also used high-rise construction. But high-rise residential districts on the suburb of the city get own social problems which are capable to destroy all advantages of high-rise construction.

Sustainable Block Design Process for High-Rise and High-Density Districts with Snow and Wind Simulations for Winter Cities

Urban designs that consider regional climatic conditions are one of the most important approaches for developing sustainable cities. In cities that suffer from heavy snow and cold winds in winter, an urban design approach different than that used for warm cities should be used. This study presents a scientific design process (the sustainable design approach) that incorporates environmental and energy assessments that use snow and wind simulations to establish guidelines for the design of urban blocks in high-rise and high-density districts so that the impact of snow and wind can be minimized in these cities. A city block in downtown Sapporo, Japan, was used as a case study, and we evaluated four conceptual models. The four models were evaluated for how they impacted the snow and wind conditions in the block as well as the snow removal energy. Based on the results, we were able to identify the design guidelines in downtown Sapporo: an urban block design with higher building height ratio without the mid-rise part can reduce the snowdrifts and lower the snow removal energy. The proposed sustainable urban design approach would be effective in improving the quality of public spaces and reducing snow removal energy in winter cities.

The impact of urban form on travel behaviour in three Baghdad neighbourhoods affected by terrorism

The article examines: 1) how travel behaviour was influenced by urban form in three terrorism-affected Baghdad districts; and 2) how the responses to terrorism in these neighbourhoods affected travel behaviour. The results suggest that urban form can mediate the impacts of terrorism and counter-terrorism with traditional urban form districts being more resilient than modern high-rise districts.

Research on Architectural Sunshine on Dahan Day in Harbin ZhongBeiChunCheng Residential District

Harbin lies in high altitude region where residential insolation has always been a sensitive and important problem in planning and construction of residential areas. As the high-rise high-density development mode plays a leading role in metropolitan residential area construction, the sunshine issues and contradiction have been highlighted. This paper aims to conduct an in-depth study on sunshine environment on Dahan Day by choosing Harbin representative high-rise residential districts. It dissects this problem in detail from three perspectives respectively, outdoor venue shadow, indoor sunshine occlusion and typical residential sunshine duration of high-rise dwelling compared with multi-storey residence, which contributes to exposing the severe current situation and diagnosing the root causes of high-rise sunshine occlusion phenomenon. Based on the new sunlight standard, suggestions are put forward in introspection on improvement of related auxiliary mechanism, multi-party balance of interest, and supervision of new standard implementation.

Wind Design Practice for High-Rise Residential Districts in Liaoning Coastal Cities

Windbreak design for high-rise residential districts in Liaoning coastal cities is a decisive factor and favorable to deduce building energy due to the high mean wind speed in winter. The article discussed the windbreak strategies for local residence districts and to apply them to an actual architectural scheme using CFD simulative technology