大跨仿古钢结构局部拆除重建监测与控制  

Monitoring and Control of Demolition and Reestablishment of a Large-span Archaistic Steel Superstructure

作　　者：李晓克[1] 贾高祥 撖鹏飞[2] 汪志昊[1] 

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450045 [2]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《华北水利水电大学学报（自然科学版）》2014年第5期60-64,共5页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：生态建筑材料与结构工程河南省高校科技创新团队支持计划(131RTSTHN002)

摘　　要：洛阳明堂仿古钢结构以内空直径50.9 m跨越既有遗址范围而建,后因外观设计和空间功能需求改变而对其上部结构进行了拆除、重建.在施工过程中结构受力体系产生了系列变迁与调整,作用荷载类型与分布形态也存在差异.为确保结构施工不影响既有遗址存在状态和结构整体安全,对其拆除和重建过程开展了监测和控制研究.结合大跨仿古钢结构受力特点,建立了结构应力、变形和沉降监测体系,明确了各施工阶段平面网架层、斜框架柱和内圈独立基础等关键部位或构件的受力变化规律,并适时调整和控制相应后续阶段的施工过程与方法.所开展的工作验证了该大跨钢结构采用拆除、重建方案的合理性和有效性,为同类工程安全施工提供了技术参考.Ming-tang archaistic steel structure in Luoyang was built with diameter 50.9 m over the existing ruins and its superstructure was dismantled and reestablished because of the improvement of shape and functional requirements. During the process of structure construction, mechanical system have been changed and adjusted, and to some extent, loads and distributing mode were different with the former. In order to protect the ruins and make sure the safety of whole structure, monitoring on demolition and reestablishment of the large-span archaistic steel structure has been carried out. Combining with mechanical characteristics of the archaistic large-span steel structure, the monitoring system of stress, deformation and settlement was built. The stress and deformation variations of key components including the plane grid layer, gradient frame columns and single footings etc. at each construction phase were analyzed, and the construction process and methods in the follow-up phase were timely adjusted and controlled. It proved that it was reasonable and feasible to adopt the given demolition and reestablishment program and it would be helpful to the construction of similar engineerings.

关 键 词：钢结构 遗址保护工程 监测 应力 变形 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]