摘要
针对超高层建筑施工过程中的施工风险预警问题,按一般状态与极限状态对系统的失效可能性进行研究,以整体钢平台装备的承力构件为关键风险环节,提出一种超高层建筑施工风险预警指标体系与方法。首先,基于风险因素耦合的事故演变路径分析和失效模式分析,结合施工现场监测条件,提出风险预警指标体系的核心指标;然后,提出一种包括人员指标、环境指标、装备指标和熔断指标在内的施工风险预警指标体系,以及各指标的分级确定准则,采用指标折减的方法分析多因素耦合对预警指标的影响,建立风险预警方法;最后,选择超高层实际工程案例进行验证。结果表明:将人员、环境风险因素的耦合影响考虑为对装备指标的折减,可以作为项目风险状态判定的有效依据,建立适用于超高层建筑施工的风险预警方法。该方法充分考虑风险因素的耦合影响,通过有限元模型计算获得指标预警值与折减系数参考表,具有可行性。
This paper focused on the early construction risk warning issue in the construction of super high-rise building,the potential failure of the system was studied according to the general state and radical state. Taking the load-bearing components of integral steel platform equipment as the key risk link,a construction risk early warning index system and method for super high-rise building were proposed. Firstly,based on the analysis of accident evolution path and failure mode considering the coupling effect of risk factors,the core indexes were proposed,combined with the monitoring conditions. Then,the early-warning index system including human,environment,equipment and fuse indexes,as well as the classification and determination criteria,are proposed. The way of reducing index was adopt to reflect the impact of multi-factor coupling effects,and applicable early-warning method was established. Finally,a project was chosen to carry out case analysis. The results showed that the method of considering the coupling effects of human and environment risk factors as a reduction of the equipment indexes could be used as effective basis for judging the risk status of the project,to establish a risk early-warning method suitable for the construction of super high-rise buildings. This method fully considered the coupling effects of risk factors,and obtained values of early-warning indexes and reduction coefficient table through finite element model calculations. It was feasible.
作者
沈阳
徐磊
郑冠雨
章超
匡志平
SHEN Yang;XU Lei;ZHENG Guanyu;ZHANG Chao;KUANG Zhiping(Shanghai Construction No.1 Group Co.,Ltd.,Shanghai 200120,China;Shanghai Construction No.7 Group Co.,Ltd.,Shanghai 200050,China;Department of Building Engineering,Tongji University,Shanghai 200082,China)
出处
《郑州大学学报（工学版）》
CAS
北大核心
2021年第4期98-104,110,共8页
Journal of Zhengzhou University（Engineering Science）
基金
国家重点研发计划项目(2017YFC0805500)
上海市青年科技英才扬帆计划项目(20YF1417800)
上海建工集团股份有限公司重点科研项目(20JCSF-06)。
关键词
超高层建筑
施工风险
整体钢平台模架装备
耦合影响
super high-rise building
construction risk
integrated scaffolding and formwork equipment with steel platform
coupling effect
