原位加载法在既有建筑安全鉴定检测中的应用  

Application of In-situ Loading Method in Safety Appraisal and Testing of Existing Buildings

作　　者：曾爱华 黄鑫磊 

机构地区：[1]中国建材检验认证集团江苏有限公司,江苏苏州215000

出　　处：《混凝土世界》2024年第1期70-73,共4页China Concrete

摘　　要：以某金工厂房工程为实例,通过原位加载法评估结构的正常使用功能,对混凝土梁构件进行堆载模拟,计算结构正常使用极限状态下的荷载,监测混凝土梁构件的挠度以及应力变化,并对混凝土梁构件的挠度、应力变化量的最大值和变化趋势进行计算和分析,得到该混凝土梁构件在正常极限状态下的轴心抗压强度,最后依据相关规范和标准中挠度的最大变化量、应变以及裂缝宽度的限值,对其检测结果进行评价。结果表明:该混凝土梁构件达到正常使用极限状态下所能承受的荷载为21.5 kN/m^(2),通过此方法可以为既有建筑的安全鉴定提供依据。This article takes a certain metalworking workshop project as an example,evaluates the normal use function of the structure through in-situ loading method,simulates the stacking load of concrete beam components,calculates the load under the normal use limit state of the structure,monitors the deflection and stress changes of concrete beam components,and calculates and analyzes the maximum value and trend of deflection and stress changes of concrete beam components to obtain the axial compressive strength of the concrete beam component under the normal limit state.Finally,based on the maximum deflection change,strain,and crack width limit values in relevant specifications and standards,the detection results are evaluated.The results show that the concrete beam component can withstand a load of 21.5 kN/m^(2) when reaching the normal service limit state,which can provide a basis for the safety assessment of existing buildings through this method.

关 键 词：原位加载法 安全鉴定 应用分析 

分 类 号：TU746[建筑科学—建筑技术科学]