Novel Design Strategies of Temporary Bracing for Early-age Masonry Structures at Construction Sites

建筑工地早期砌体结构临时支撑的新颖设计策略

• 批准号: 555571-2020
• 负责人: Sadhu, Ayan
• 金额: $ 1.85万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=705499
• 关键词: Novel; Design; Strategies; Temporary; Bracing

There has been significant development of various advanced materials in construction industries. However, masonry is still considered as one of the most cost-effective materials. Masonry structures, when properly designed, can resist wind or earthquake-induced lateral loads of large amplitude. However, they are vulnerable to wind-induced lateral loads caused during the construction stage when the masonry is yet to achieve full strength. Freestanding masonry walls at construction sites have been frequently blown over, resulting in the loss of materials, injury to workers, and a subsequent increase in the construction cost. Temporary wind bracing is commonly used to laterally support masonry structures at job sites and develop adequate lateral strength until the structures achieve the inherent full lateral support. However, unlike the primary load-bearing bracing, the design of temporary bracing (TB) is relatively subjective and error-prone, and their sudden failure may lead to injury or death of construction workers at job sites. The industry partners, Canada Masonry Design Centre (CMDC) and the Canadian Concrete Masonry Producers Association (CCMPA) anticipate the urgency for accurate design of TB that would serve as potential engineering guidelines to various consulting firms and mason contractors. The main objective of this proposal is to develop and share with our industry partners, stringent design guidelines, and monitoring technology of TB systems at the construction sites and eliminate the approximate design strategies adopted by the masonry industry. Once developed, the entire masonry industry will be benefitted in significant cost-savings in preventing faulty TBs and their repetitive replacement at job sites, resulting in a safer and secure workplace for mason contractors and workers.

在建筑行业中，各种先进材料已经有了显着的发展。然而，砖石仍然被认为是最具成本效益的材料之一。当适当设计时，砌体结构可以抵抗风或地震引起的大幅度横向载荷。然而，当砌体尚未达到完全强度时，它们容易受到施工阶段引起的风致横向荷载的影响。建筑工地的独立砌石墙经常被风吹倒，造成材料损失、工人受伤，从而增加了建筑成本。临时抗风支撑通常用于在施工现场横向支撑砌体结构，并形成足够的横向强度，直到结构实现固有的完全横向支撑。然而，与主要承重支撑不同，临时支撑（TB）的设计相对主观且容易出错，并且其突然失效可能导致施工工人在施工现场受伤或死亡。行业合作伙伴加拿大砌体设计中心（CMDC）和加拿大混凝土砌体生产商协会（CCMPA）预计TB的准确设计将成为各种咨询公司和砌体承包商的潜在工程指南。该提案的主要目的是与我们的行业合作伙伴开发和分享严格的设计指南，以及施工现场TB系统的监测技术，并消除砌体行业采用的近似设计策略。一旦开发出来，整个砖石行业将在防止有缺陷的TB及其在工作现场的重复更换方面节省大量成本，从而为砖石承包商和工人提供更安全可靠的工作场所。