摘要
该文针对某多层厂房在改造前的结构安全性及抗震性能进行了系统的鉴定与评估.通过现场检测和竣工图纸的分析,建立了相应的模型,对厂房的结构承载力和抗震性能进行了深入研究.厂房为地下二层、地上三层的框架-剪力墙结构,建筑总高度 18.50 m,设计使用年限为 50 年,抗震设防类别为丙类,地震设防烈度为 6 度.现场调查显示,厂房目前处于闲置状态,未发现明显的沉降或裂缝现象.通过对基础和上部主体结构的检测,结果表明混凝土强度和构件尺寸均满足设计要求,但部分构件的钢筋配置不符合规范.结构承载力和抗震能力的计算分析结果显示,结构承载力和抗震承载力均满足要求,但个别构件的抗震措施需进行加固.最终,鉴定结果将该厂房的安全性等级评定为Bsu级,为后续的改造加固提供了技术支持.
Abstract
This paper systematically appraises and evaluates the structural safety and seismic performance of a multi-story factory building prior to renovation.Through on-site inspections and analysis of as-built drawings,a corresponding model is established to conduct in-depth research on the structural bearing capacity and seismic performance of the factory building.The building is a frame-shear wall structure with two underground floors and three above-ground floors,having a total height of 18.50 m.It has a design service life of 50 years,is classified as Category C for seismic fortification,and is designed to withstand an earthquake intensity of 6 degrees.On-site investigations reveal that the factory building is currently unoccupied and exhibits no visible signs of settlement or cracks.The inspection of the foundation and upper main structure indicates that the concrete strength and member dimensions meet design requirements,but the reinforcement arrangement of some members does not comply with specifications.The results of calculations and analyses for structural bearing capacity and seismic resistance reveal that both meet the requirements,but seismic measures for individual members need reinforcement.Ultimately,the appraisal results classify the safety level of the factory building as Bsu,providing technical support for subsequent renovation and reinforcement work.
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