Improved design and monitoring of wind bracing for fresh masonry****

改进新砌体抗风支撑的设计和监测****

• 批准号: 533731-2018
• 负责人: Sadhu, Ayan
• 金额: $ 1.81万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=664040
• 关键词: Improved; design; monitoring; wind; 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. In fact, free standing masonry walls at job site 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 site and develop adequate lateral strength until a time where inherent full lateral support is obtained. However, unlike the primary load bearing bracing, 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 site. The industry partner, Canadian Masonry Design Centre (CMDC), anticipates the urgency for accurate design and placement of TB that would serve as potential engineering guideline to various consulting firms and mason contactors. The main objective of this proposal is to develop and share with our industry partner, stringent design guidelines and monitoring technology of TB systems at construction site and eliminate the approximate design strategies adopted by the masonry industry. Once developed, CMDC and entire masonry industry will be benefitted in significant cost-savings in preventing faulty TBs and their repetitive replacement at job site, resulting in 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，但砌体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。事实上，工地上的独立式石墙经常被风吹倒，导致物料流失、工人受伤，以及建筑成本增加。临时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，直到获得固有的完全横向支撑。然而，与主支撑不同，临时支撑的设计相对主观且容易出错，其突然失效可能导致施工人员在施工现场受伤或死亡。行业合作伙伴加拿大石匠设计中心（CMDC）预计，TB的准确设计和放置将成为各种咨询公司和石匠接触器的潜在工程指南。本提案的主要目的是与我们的行业合作伙伴制定并分享施工现场TB系统的严格设计指南和监测技术，并消除砌体行业采用的近似设计策略。一旦开发完成，CMDC和整个砖石行业将在防止错误TB和在工作现场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。