风险因素耦合作用下的整体钢平台施工预警方法研究

Research on early warning method for construction of integrated steel platform under coupling effect of risk factors

为解决整体钢平台在施工过程中的风险预警难题,提出风险因素耦合作用下的整体钢平台施工预警方法。从人员、设备、环境、管理、技术5个方面分析可能导致施工事故的风险因素,结合项目确定设备、人员和环境为影响较大的3种因素指标,并从整体钢平台的一般状态和极限状态出发分析其失效模式,建立以设备结构为核心预警指标的施工风险预警指标体系;制定各预警指标的分级准则,通过有限元分析将人员、环境对设备结构的干扰归一为折减系数,对整体钢平台的设备指标进行折减,并结合现场结构监测进行验证。研究结果表明:预警结果符合工程实际,计算得到的指标折减系数可作为发布预警信息的依据,给出的整体钢平台设备指标的4级预警值具有可行性。

In order to solve the problem of risk early warning during the construction of integrated steel platform,an early warning method for the construction of integrated steel platform under the coupling of risk factors was proposed.The risk factors that may cause construction accidents were analyzed from five aspects of human,equipment,environment,management and technology,and the equipment,human and environment were identified as the three factors with greater influence in combination with the project.The failure mode of the integrated steel platform was analyzed from its general state and limit state,and the early warning index system of construction risk with equipment structure as the core early warning index was established.The classification criteria of each early warning index were formulated,then the interference of human and environment to equipment structure was normalized as the discount factor through finite element analysis.The equipment index of the integrated steel platform was discounted,and the verification was conducted combined with on-site structural monitoring.The results show that the early warning results are in line with the engineering reality,the calculated index reduction coefficients can be used as the basis for issuing early warning information,and the four-level early warning values of the integrated steel platform equipment indexes are feasible.