某中医院住院楼加层加固施工过程沉降模拟与实测分析

The Constructional Process Simulation and Settlement Monitoring Analysis on Adding Stories and Strengthening of the Impatient Building in a Chinese Medicine Hospital

山西某中医院住院楼加层加固改造工程施工工期短、难度大。为确保整个施工过程的顺利实施及施工中结构的位移变形满足设计要求,在对加层改造结构进行变形监测基础上,同时建立该住院楼的有限元分析模型,模拟结构改造施工全过程。现场监测和分析结果表明:在特有的前提下,该结构"先加层后加固"的特殊施工方案安全可行;不同施工段对结构整体沉降变形影响差异较大,尤其是钢结构加层施工所产生的变形占总体变形的60%以上;不同加载模拟方式对结构整体不均匀沉降影响明显,且相对于一次性加载方式,逐层加载方式对应的不均匀沉降值较小。

It has short construction period and difficult technology for the adding stories and strengthening construction of the impatient building in a Chinese medicine hospital of Shanxi. On the basis of settlement monitoring of the object,the finite element model is founded in order to simulate the whole construction process to verify whether it is in accordance with the design requirements,and ensure the safety of the whole construction. The above analysis results indicates that the unusual constructional scheme that steel adding stories prior to strengthening existing RC structure is reasonable under specific premise; the influence of different constructional stages on the settlement of the object is significant,especially the deformation caused by the steel adding stories accounts for above 60% of the total settlement; the influence of two kinds of loading simulation modes on the uneven settlement is obvious. The results obtained from ＂layer-by-layer loading mode＂is less than that from ＂one-time loading mode＂.