Wind Load Impact on Tall Buildings During Severe Wind Events

Wind Load Impact on Tall Buildings During Severe Wind Events

Wind Load Impact on Tall Buildings During Severe Wind Events

Meteorology Matters looks at the performance of tall building facades under severe wind conditions, focusing on damage observations from recent events (May-July 2024) including a derecho and Hurricane Beryl in Houston, Texas. The study combines real-world damage assessments with wind tunnel simulations conducted at the NSF NHERI Wall of Wind Experimental Facility to understand the factors contributing to facade failures. A key finding is that non-hurricane wind events, like derechos and downbursts, can cause significant localized damage due to wind channeling effects in urban areas and the unique characteristics of these wind events. The research highlights the need for reassessing wind load design criteria for tall buildings to account for these factors.

Key Themes and Ideas:

  • Increased Vulnerability of Tall Buildings: The article emphasizes the growing number of tall buildings in urban environments and their inherent vulnerability to extreme wind events.
  • "As urbanization accelerates, the construction of tall buildings has surged, becoming a defining feature of modern cityscapes... Tall buildings, while contributing to economic growth and urban development, face substantial risks from extreme wind events, such as hurricanes and downbursts."
  • Impact of Non-Hurricane Wind Events: A core argument is that localized convective systems like derechos and downbursts pose a significant threat to tall building facades, sometimes causing more damage than hurricanes with comparable wind speeds.
  • "localized convective systems such as derecho and downbursts rank among the most formidable natural forces capable of inflicting severe damage on tall structures."
  • "Comparing the observations in both events, the damage resulted from the derecho was more severe than that resulted from the hurricane, despite comparable gust speeds."
  • Wind Channeling in Urban Areas: The study identifies wind channeling in densely built urban environments as a critical factor in facade damage. The interaction of wind forces with surrounding buildings can amplify pressures on specific facades.
  • "...critical vulnerabilities in tall building façades, particularly in relation to wind channeling effects in densely built urban areas."
  • "As observed, channelling effects in dense urban environment might have a significant consequence on the wind-induced local pressures and have contributed to the damage observed in Houston during the derecho."
  • Need for Reassessing Wind Load Design: The research suggests that current wind load design criteria may not adequately account for the complexities of wind behavior in urban areas, especially concerning non-hurricane events.
  • "...underscore the need for a reassessment of wind effects on tall buildings to better reflect the complex interactions between wind forces and urban environments."
  • Wind Tunnel Testing Methodology: The study uses wind tunnel simulations at the NHERI Wall of Wind Experimental Facility to investigate wind loads on tall building models under both atmospheric boundary layer (ABL) and downburst wind conditions. The wind tunnel is equipped with a 12-fan system simulating Category 5 hurricane conditions.

Avsnitt(212)

Florida Always Near Top in Hurricane Building Codes

Florida Always Near Top in Hurricane Building Codes

The Insurance Institute for Business & Home Safety (IBHS) has published a report titled “Rating the States” that evaluates the building code enforcement and administration systems, as well as contractor licensing practices in the 18 Atlantic and Gulf coast states most vulnerable to hurricanes. Each state is assigned a score from 0 to 100 based on the state’s adoption, implementation, and enforcement of building codes designed to minimize windstorm damage. The report highlights states with the most effective building code systems, identifies areas for improvement, and emphasizes the importance of adopting modern building codes to reduce the devastating impacts of hurricanes. The IBHS report provides valuable insights into the effectiveness of state-level building codes and serves as a resource for policymakers to make informed decisions regarding building code regulations.

17 Okt 20247min

Miami King Tides: Flooding this Weekend and Beyond

Miami King Tides: Flooding this Weekend and Beyond

We explore the phenomenon of king tides and their increasing impact on coastal cities, particularly Miami. King tides are naturally occurring high tides that occur during specific lunar phases, amplified by the sun's gravitational pull. We discuss how these tides, exacerbated by rising sea levels due to climate change, are causing frequent sunny-day flooding in Miami and other coastal areas. We highlight the growing threat of these floods to infrastructure, businesses, and the overall well-being of coastal communities. The need can’t be emphasize enough for proactive planning and investment in mitigation strategies to address the escalating problem of king tides.

16 Okt 20247min

Mental Health Check: Hurricane Fatigue and PTSD After Helene and Milton

Mental Health Check: Hurricane Fatigue and PTSD After Helene and Milton

We examine the mental health consequences of hurricanes, specifically focusing on the hurricane fatigue, prevalence of post-traumatic stress disorder (PTSD), anxiety, and depression in hurricane-affected populations. We highlight the compounding effects of repeated hurricanes on mental health, as well as the role of environmental factors like green space and social support in mitigating those effects. We also provide recommendations for individuals and communities on how to cope with hurricane-related stress and trauma, and emphasize the importance of seeking professional help when needed.

15 Okt 202410min

Where Will Home Prices Go After Hurricanes Helene & Milton?

Where Will Home Prices Go After Hurricanes Helene & Milton?

The sources discuss the impact of Hurricane Helene on the housing markets in Florida, particularly in the Tampa Bay area. Several articles note that, following the devastation caused by Hurricane Helene and previous hurricanes, home prices tend to increase, as wealthier buyers move in and take advantage of the reduced housing supply. However, this influx of wealthier buyers can displace longtime residents, causing a shift in the social fabric of the community. The articles also highlight the challenges faced by homeowners with limited resources and how insurance rates and government assistance contribute to these trends.

14 Okt 202413min

Armed Militia Threatens Hurricane Helene Relief Workers in North Carolina Hampering Efforts

Armed Militia Threatens Hurricane Helene Relief Workers in North Carolina Hampering Efforts

Federal emergency response personnel in North Carolina were temporarily relocated due to reports of an "armed militia" threatening government workers involved in Hurricane Helene recovery efforts. Misinformation and rumors have been spreading throughout the affected areas, resulting in hostility towards federal agencies and a decline in the acceptance of aid offered by FEMA and the Forest Service. These incidents have also resulted in harassment and threats directed at federal employees. “Around 1 p.m. Saturday, an official with the U.S. Forest Service, which is supporting recovery efforts after Hurricane Helene along with the Federal Emergency Management Agency, sent an urgent message to numerous federal agencies warning that “FEMA has advised all federal responders Rutherford County, NC, to stand down and evacuate the county immediately. The message stated that National Guard troops 'had come across x2 trucks of armed militia saying there were out hunting FEMA.’” - Washington Post

14 Okt 202414min

Florida’s Insurance Crisis Deepens in the Wake of Hurricanes Helene & Milton

Florida’s Insurance Crisis Deepens in the Wake of Hurricanes Helene & Milton

Hurricane Milton is poised to severely impact Florida's already struggling property insurance market. This comes after the state faced record-breaking insurance costs and several insurance company failures, leading to the rise of Citizens Property Insurance Corporation, a non-profit that provides coverage to homeowners unable to find it in the private market. The state has been trying to stabilize the market through legal reforms and by encouraging private insurers to return, but Milton's potential devastation could push prices higher and further strain the system. Although Florida's real estate market remains resilient, a significant storm could lead to more insurers withdrawing from the state, leaving Citizens to cover a larger portion of the losses, potentially putting the state in a difficult financial position.

14 Okt 20248min

EC-AIFS AI Euro Model Blows Away the Competition with Hurricane Milton Forecast

EC-AIFS AI Euro Model Blows Away the Competition with Hurricane Milton Forecast

Advancements in hurricane forecasting with the introduction of the ECMWF EC-AIFS, a new artificial intelligence model does incredible job with Milton prediction. It boasts significantly higher accuracy compared to other models, predicting the landfall of Hurricane Milton with an error margin of only 13 miles. We emphasize the model's potential to save lives, resources, and time by pinpointing the most accurate landfall location. Additionally, the importance of continuously improving forecasting skills by analyzing past predictions and current atmospheric conditions to make the most informed decisions is an important part of hurricane forecasting today that need a human touch.

14 Okt 20244min

Climate Change Impacts on Hurricane Milton: Wetter, Windier & More Destructive

Climate Change Impacts on Hurricane Milton: Wetter, Windier & More Destructive

World Weather Attribution examines the effects of climate change on Hurricane Milton, which recently made landfall in Florida. The report from WA analyzes the hurricane's intensity, rainfall, and wind speeds, concluding that climate change significantly increased the likelihood and intensity of the storm. The report also discusses the impact of Hurricane Milton on Florida's infrastructure and preparedness, highlighting the vulnerability of low-income and minority communities. It then provides an overview of the effects of climate change on hurricanes globally, emphasizing the growing trend of more intense storms and the need for better preparedness and adaptation measures.

12 Okt 20248min

Populärt inom Vetenskap

p3-dystopia
dumma-manniskor
svd-nyhetsartiklar
rss-vetenskapligt-talat
allt-du-velat-veta
kapitalet-en-podd-om-ekonomi
det-morka-psyket
dumforklarat
rss-vetenskapspodden
rss-vetenskapsradion
rss-i-hjarnan-pa-louise-epstein
rss-vetenskapsradion-2
rss-ufobortom-rimligt-tvivel
rss-personlighetspodden
medicinvetarna
rss-spraket
sexet
vetenskapsradion
paranormalt-med-caroline-giertz
a-kursen