大曲率巨型钢桁架的结构安全监测平台与施工监测研究  

Structural Safety Monitoring Platform and Construction Monitoring of Mega Steel Truss with Large Curvature

作　　者：傅文炜 陈鑫[1] 陈泽云 柴明明 周红燕 潘鸿 FU Wenwei;CHEN Xin;CHEN Zeyun;CHAI Mingming;ZHOU Hongyan;PAN Hong(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;Suzhou Fangzheng Engineering Technology Development Testing Co.,Ltd.,Suzhou 215133,China;Zhongyifeng Construction Group Co.,Ltd.,Suzhou 215131,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]苏州方正工程技术开发检测有限公司,江苏苏州215133 [3]中亿丰建设集团股份有限公司,江苏苏州215131

出　　处：《建筑钢结构进展》2024年第11期110-118,共9页Progress in Steel Building Structures

基　　金：国家自然科学基金(52178294);住房和城乡建设部技术创新项目(2019-K-042);江苏省高等学校自然科学研究重大项目(19KJA430019);苏州市科技计划项目(SYG202113)。

摘　　要：由于复杂建筑结构的施工难度大且不确定性高,开展结构施工监测对整体的安全稳定至关重要。基于BIM和Web技术研发了对巨型钢桁架结构进行施工监测的结构安全监测平台,并对监测平台的总体设计思路及各项功能进行了详细的说明。根据监测数据的概率分布特征,利用高斯混合模型确定监测预警值以开展结构安全预警。该安全监测平台跟踪了钢桁架卸载施工全过程的形态和内力变化情况,建立了钢桁架的精细化模型以模拟卸载施工的全过程,并对比分析了实测结果和计算结果。研究结果表明:钢桁架z向位移均未超过跨度的1/400,构件应力比的最大值未超过0.4,说明了卸载施工的安全性较高;施工阶段的实测应力和位移的相对误差不超过10%,反映了数值模型对于卸载施工模拟的可靠性和有效性;所研发的监测平台获得了卸载全过程的结构响应变化规律,可为结构状态评估提供可靠的数据支撑。Due to the high construction difficulty and uncertainty of complex building structures,construction monitoring for structures plays a key role in the overall safety and stability of structures.In this paper,a structural safety monitoring platform based on BIM and Web technology was developed to monitor the mega steel truss.The overall design idea and various functions of the monitoring platform were demonstrated in detail.Based on the probability distribution characteristics of the monitoring data,the Gaussian mixture model was used to determine the threshold of the monitoring data for structural safety warning.The morphological and internal force changes of the steel truss were obtained by the monitoring platform during the whole process of unloading construction.A refined model of steel truss was established to simulate the whole process of unloading construction,and a comparison analysis between measured and calculated results was carried out.The results show that the z-directional displacement data do not exceed 1/400 of the span,and the maximum stress ratio of the members do not exceed 0.4 indicating the high safety of the unloading construction.The relative errors of the measured stresses and displacements do not exceed 10%,which reflects the reliability and validity of the numerical model for simulating the unloading construction.The monitoring platform developed in the paper obtain the structural response variation during the whole unloading construction process,which can provide reliable data support for the condition assessment of the structure.

关 键 词：巨型钢桁架 结构健康监测 安全监测平台 施工监测 施工模拟 

分 类 号：TU394[建筑科学—结构工程]