超高层建筑在极端台风气候下结构及施工安全风险分析及控制研究

发布时间：2018-01-08 04:20

本文关键词：超高层建筑在极端台风气候下结构及施工安全风险分析及控制研究　出处：《土木工程学报》2014年07期 　论文类型：期刊论文

【摘要】：超高层建筑因结构复杂施工周期长、施工过程中未形成完整的结构体系,在可能遭遇的极端台风情况下存在较大的结构安全和大型设备安全风险,该文对其施工中的重大安全风险因素进行阐述,指出合理的确定台风级别(风荷载)是整个风险管理和控制的首要任务。鉴于目前国家相关规范没有对施工过程安全风险控制的风荷载取值进行规定,对上海地区10年间的台风资料进行统计分析,结合背景工程上海中心大厦现场的风速实测数据,提出超高层建筑施工安全风险分析时宜取10年一遇风荷载(10级风,基本风压0.4kPa),通过与国家荷载规范相应的风荷载进行对比,表明文中的风荷载取值是合理可靠的。以上海中心大厦工程为案例,对施工过程中的结构安全风险进行施工风险模拟分析,考虑了大型塔吊不同工况和核心筒钢平台的影响,根据分析结果指出结构在施工最高(8区)时,核心筒存在较大的安全风险,提出相应的风险应对加固措施,并对加固后的结构安全进行评价,结果表明加固后的核心筒变形、应力均满足要求,安全可靠。对施工中大型塔吊的风险管理进行研究,根据台风大小将大型塔吊分为蓝、黄、橙、红、黑五级风险,针对不同风险级别制定相应的风险应对措施,以指导现场大型塔吊的施工风险管理。目前该工程主体结构已封顶(580m),并成功经历了2012年超强台风海葵的考验,施工过程中没有出现结构安全性问题和塔吊安全事故,确保工程的顺利实施,表明文中提出的风险研究和控制措施合理可靠。该文首次对500m以上的超高层建筑施工结构安全风险和大型塔吊安全风险进行研究,其成果为今后类似超高层建筑施工中安全风险管理提供较好的借鉴。
[Abstract]:Because of the complex structure of high-rise building construction cycle is long, the structure system has not formed a complete construction process, there are large structural safety and equipment safety risk in extreme typhoon situation may encounter, this paper elaborates on the major risk factors in the construction, points out that the determination of the typhoon level reasonable (wind load) is the primary the task of risk management and control. In view of the relevant national standards of wind loads on construction safety risk control regulations for 10 years in Shanghai typhoon data for statistical analysis, combined with the measured wind speed data background engineering Shanghai Center Tower site, proposed high-rise building construction safety risk analysis should take 10 years (wind load basic wind 10 wind, 0.4kPa), compared with the national standard wind load corresponding to the load, to show that the wind load from The value is reasonable and reliable. The Shanghai Center Tower project as a case, the construction risk analysis of structural safety risk in the construction process, considering the influence of different conditions and large crane core tube steel platform, according to the results of the analysis pointed out that the structure in the construction the highest (8), the core tube there is a big security risk, put forward risk to deal with the corresponding reinforcement measures, and evaluate the safety of structure after reinforcement, the results show that the core tube reinforcement after deformation, stress can meet the requirement, safe and reliable. The large tower crane in the construction of risk management in research, according to the size of the large tower crane is divided into blue, yellow, orange, red, black five the risk level, formulate the corresponding risk response measures according to different levels of risk in construction risk management guide site. The project of large tower crane main structure has been completed (580m), and the successful experience of the 2012 super The typhoon test, no structural safety problems and crane safety accidents occurring during the construction process, to ensure the smooth implementation of the project, and research shows that risk control measures are proposed in the paper is reasonable and reliable. This is the first time to study the 500m above the structural safety of tall building construction risk and large crane safety risk, the results provide good the reference for similar safety risk management of high-rise building construction.

【作者单位】：上海建科工程咨询有限公司;
【基金】：上海市科学技术委员会上海市科技人才计划项目资助(12XD1423000)
【分类号】：TU714
【正文快照】： 引言随着中国城市化进程的推进,城市土地资源变得越来越稀缺,超高层建筑越来越受到青睐。此外,超高层建筑尤其是摩天大楼作为城市名片地标建筑也受到政府、大型企业等的喜爱。为此,在中国正掀起了一股超高层建筑建设浪潮,尤其是在中国最为发达的沿海地区如广州、深圳、天津、

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