Möglichkeiten und Grenzen der landesplanerischen Steuerung des Windenergieausbaus

The expansion of onshore wind energy is faltering. The federal states, which can control the expansion through goals and principles in state-wide spatial plans, have a share in this. The study shows that the associated restriction of the freedom to build is subject to the principle of proportionality as a content and limitation provision of property. Based on the system of spatial control of wind energy in the BauGB (Federal Building Code). and ROG (Regional Planning Act), a substance requirement for the use of wind energy in outdoor areas is derived from the privilege in § 35 para. 1 No. 5 BauGB. On the basis of the specifications in state-wide spatial development plans, it is evaluated to what extent protective goods, such as immission control or acceptance, can be used as justification.

Quantification of Optimal Target Reliability for Seismic Design: Methodology and Application to Midrise Steel Buildings

Quantification of the optimal target reliability based on the minimum lifecycle cost is the goal standard for calibration of seismic design provisions, which is yet to be fully-materialized even in the leading codes. Deviation from the optimally-calibrated design standards is significantly more pronounced in countries whose regulations are adopted from the few leading codes with no recalibration. A major challenge in the quantification of optimal target reliability for such countries is the lack of risk models that are suited for the local construction industry and design practices. This paper addresses this challenge by presenting an optimal target reliability quantification framework that tailors the available risk models for the countries from which the codes are adopted to the local conditions of the countries adopting the codes. The proposed framework is showcased through the national building code of Iran, which is adopted from the codes of the United States, using a case study of three midrise residential steel building archetypes. The archetypes have various structural systems including intermediate moment-resisting frame (IMF) and special concentrically braced frame (SCBF). Each of these archetypes are designed to different levels of the base shear coefficient, each of which corresponds to a level of reliability. To compute the lifecycle cost, the initial construction cost of buildings is estimated. Next, robust nonlinear models of these structures are generated, using which the probability distribution of structural responses and the collapse fragility are assessed through incremental dynamic analyses. Thereafter, the buildings are subjected to a detailed seismic risk analysis. Subsequently, the lifecycle cost of the buildings is computed as the sum of the initial construction cost and the seismic losses. Finally, the optimal strength and the corresponding target reliability to be prescribed are quantified based on the notion of minimum lifecycle cost. The results reveal a 50-year optimal reliability index of 2.0 and 2.1 for IMF and SCBF buildings, respectively and an optimal collapse probability given the maximum considered earthquake of 16% for both systems. In the context on the case study of the national building code of Iran, the optimal design base shear for IMF buildings is 40% higher than the current prescribed value by the code, whereas that of SCBF buildings is currently at the optimal level.

Moisture in New Zealand Bathrooms - Analysing Moisture Events

<p>A literature review was carried out on the impact of moisture in New Zealand homes as well as the role ventilation and occupant behaviour play in controlling this. Bathrooms in residential homes were identified as being especially vulnerable. NZS4303:1990, clause G4 Ventilation of the New Zealand Building Code, and clause E3 of the New Zealand Building Code were summarised to provide context for how New Zealand buildings are designed. Measurements taken in houses throughout New Zealand by BRANZ as part of the House Condition Survey were made available for analysis. This included measurements of relative humidity and temperature. Data from one Dunedin house was thoroughly explored. This involved three objectives. The first step focused on identifying periods of rapid change in the amount of moisture introduced to the indoor environment, measured in absolute humidity. These periods were named 'moisture events'. The second objective was to visually communicate the changes in temperature and absolute humidity taking place on individual days, highlighting moisture events. The third objective was to analyse the identified moisture events, finding the key areas to focus on for the full analysis as well as areas that could be explored in further research. This process was then applied to all remaining houses. Moisture events were grouped into four categories: increases, decreases, episodes, and combinations. Episodes were the focus of the analysis, representing moisture being actively introduced to the indoor environment and then removed. These categories were further filtered, identifying the moisture events were most likely to have had a large impact on the indoor environment. Days were broken into four hour periods, with the filtered moisture events taking place in each period recorded. These were used to identify patterns in moisture events for each house. If a certain pattern of moisture events frequently took place, then days containing that pattern were described as a 'typical day' for that house. The mean and median absolute humidity at the start, peak, and end of the unfiltered episodes from each house were then calculated. The mean and median episode length was also calculated. The results were compared to the Household Energy End-use Project (HEEP) and to the typical days for each house. The results were grouped according to factors such as the number of bathrooms in the house, the floor area, the house location, and the event length. The number of bathrooms present in the house was found to have a large impact on the size and frequency of moisture events. As expected, larger bathrooms recorded lower increases in absolute humidity from the start to the peak of episodes. Rooms with a greater volume would require more moisture to reach the same number of grams of water per cubic metre. However, the smallest bathrooms also recorded low increases in absolute humidity.</p>

Moisture in New Zealand Bathrooms - Analysing Moisture Events

<p>A literature review was carried out on the impact of moisture in New Zealand homes as well as the role ventilation and occupant behaviour play in controlling this. Bathrooms in residential homes were identified as being especially vulnerable. NZS4303:1990, clause G4 Ventilation of the New Zealand Building Code, and clause E3 of the New Zealand Building Code were summarised to provide context for how New Zealand buildings are designed. Measurements taken in houses throughout New Zealand by BRANZ as part of the House Condition Survey were made available for analysis. This included measurements of relative humidity and temperature. Data from one Dunedin house was thoroughly explored. This involved three objectives. The first step focused on identifying periods of rapid change in the amount of moisture introduced to the indoor environment, measured in absolute humidity. These periods were named 'moisture events'. The second objective was to visually communicate the changes in temperature and absolute humidity taking place on individual days, highlighting moisture events. The third objective was to analyse the identified moisture events, finding the key areas to focus on for the full analysis as well as areas that could be explored in further research. This process was then applied to all remaining houses. Moisture events were grouped into four categories: increases, decreases, episodes, and combinations. Episodes were the focus of the analysis, representing moisture being actively introduced to the indoor environment and then removed. These categories were further filtered, identifying the moisture events were most likely to have had a large impact on the indoor environment. Days were broken into four hour periods, with the filtered moisture events taking place in each period recorded. These were used to identify patterns in moisture events for each house. If a certain pattern of moisture events frequently took place, then days containing that pattern were described as a 'typical day' for that house. The mean and median absolute humidity at the start, peak, and end of the unfiltered episodes from each house were then calculated. The mean and median episode length was also calculated. The results were compared to the Household Energy End-use Project (HEEP) and to the typical days for each house. The results were grouped according to factors such as the number of bathrooms in the house, the floor area, the house location, and the event length. The number of bathrooms present in the house was found to have a large impact on the size and frequency of moisture events. As expected, larger bathrooms recorded lower increases in absolute humidity from the start to the peak of episodes. Rooms with a greater volume would require more moisture to reach the same number of grams of water per cubic metre. However, the smallest bathrooms also recorded low increases in absolute humidity.</p>

Evaluating the Impact of Energy Efficiency Building Codes for Residential Buildings in the GCC

In arid climates, almost half of the urban peak load of energy demand is used to supply cooling and air-conditioning in the summertime. The pressure placed on energy resources to satisfy inhabitants’ indoor comfort requirements is mounting due to accelerated urbanisation rates in developing countries and has led countries such as those in the GCC (Gulf Cooperation Council) to establish sustainable building codes to enhance their environmental performance. Using the extensive parametric energy simulations provided by DesignBuilder, this study addresses the potential of applying different GCC energy efficiency measures to reduce annual energy consumption and carbon emissions in a typical residential dwelling in the Kingdom of Bahrain. To do so, first, a base case validation simulation model was generated, followed by four design scenarios addressing the minimum requirements for Bahrain’s Energy Conservation Code, Abu Dhabi’s ESTIDAMA 1, Saudi Arabia’s code, and Kuwait’s building code. Then, a feasibility study was conducted using the simple payback period (SPP) and lifecycle cost (LCC) analysis. Overall energy and carbon emission (CO2) reduction showed the potential for building sustainable codes to improve building environmental performance throughout the year. In terms of energy performance and CO2 reduction, Abu Dhabi’s ESTIDAMA 1 code recorded the best energy savings at a 24.4% and a 26.3% reduction in carbon emissions, followed by the Saudi code with a 14.6% annual energy savings and 12.3% less carbon emissions. Regarding the economic analysis, although the SPP indicates the Bahraini code offered payback in just under two years for subsidised energy and half a year for unsubsidised, the LCC analysis suggests that applying Abu Dhabi’s ESTIDAMA 1 code was the most feasible, followed by the Saudi building code. Consequently, the study suggests a comprehensive evaluation of the relationship between the sustainable building codes and their economic feasibility in order to enhance and promote the wide application in the GCC based on the code’s capabilities and their benefits for residential households and the overall economy.

New Zealand Building Code Clause G7 Compliance Assessment Tool: Development and Implementation

<p>The New Zealand Building Code Clause G7 (NZBC G7) minimum requirement for natural light is not being met in around half of New Zealand apartments post-construction. The main reasons for this are an acceptable solution that is not effective for apartment buildings and a lack of tools for Territorial Authorities to assess accurately whether an apartment will meet the minimum requirement. This report outlines the process involved in developing a simplified tool to assess quickly natural light compliance in apartments and preparing it for implementation. The tool was developed through simulation of factors that affect daylight performance at the point in the room specified in the Code: the back of habitable rooms. From these simulations statistical analysis was used to develop mathematical relationships between building features and light levels. These relationships were used to create a tool that specifies whether an apartment would require simulation to prove compliance with NZBC G7. Calibration measurements were performed, comparing simulated and real measurements in 97 apartments with the predictions of the tool. These demonstrated that the tool provides reliable results, hence determining the accuracy of the predictions provided by the tool. The final step in the research was for potential end-user groups to evaluate the usability and functionality of the tool. The conclusion of this process is that a tool has been developed that is simple and easy to use, is sufficiently accurate for application by Territorial Authorities as a decision tool and can be easily implemented.</p>

New Zealand Building Code Clause G7 Compliance Assessment Tool: Development and Implementation

<p>The New Zealand Building Code Clause G7 (NZBC G7) minimum requirement for natural light is not being met in around half of New Zealand apartments post-construction. The main reasons for this are an acceptable solution that is not effective for apartment buildings and a lack of tools for Territorial Authorities to assess accurately whether an apartment will meet the minimum requirement. This report outlines the process involved in developing a simplified tool to assess quickly natural light compliance in apartments and preparing it for implementation. The tool was developed through simulation of factors that affect daylight performance at the point in the room specified in the Code: the back of habitable rooms. From these simulations statistical analysis was used to develop mathematical relationships between building features and light levels. These relationships were used to create a tool that specifies whether an apartment would require simulation to prove compliance with NZBC G7. Calibration measurements were performed, comparing simulated and real measurements in 97 apartments with the predictions of the tool. These demonstrated that the tool provides reliable results, hence determining the accuracy of the predictions provided by the tool. The final step in the research was for potential end-user groups to evaluate the usability and functionality of the tool. The conclusion of this process is that a tool has been developed that is simple and easy to use, is sufficiently accurate for application by Territorial Authorities as a decision tool and can be easily implemented.</p>

Has the introduction of the possibility to build a single-family house on the basis of notification really improved the development process? The analysis based on the example of the Capital City of Warsaw (Poland)

On 28 June 2015 an amendment of the Polish Building Code that abolished a requirement to get a building permission to construct or reconstruct a free standing one-family house, which impact area is limited to the plot on that it is planned, came into force. Since then an erection of such houses has been possible on a basis of notification instead. The goal of this amendment was to simplify the development process in the case of one-family houses. This article is a contribution to the verification of this assumption. Therefore data on notifications that were submitted to respective capital city of Warsaw districts’ offices have been analysed. Detailed research has been limited to the districts of Bielany and Białołęka.