某厂房结构开裂原因分析及加固对策

Strengthening and the Reasons Analysis of the Structure's Cracking

通过对某厂房结构进行详细的调查、研究,发现承载二层生产设备的楼面大梁普遍存在开裂现象,尤以梁端核心区开裂严重,部分构件局部裂缝已发展贯通,同时楼面梁和楼面板底部抹灰层出现大面积剥落。本文在用有限元程序对结构进行内力计算和配筋验算的基础上,通过模态分析得到结构的各阶振型和频率,结合新旧规范对结构抗力和构造措施等方面要求的差异,分析了引起结构开裂和承载力不足的原因,并对其裂缝形态和形成机理进行了论述,最后通过粘贴碳纤维布对结构构件进行了加固补强,使之满足现有荷载状况下的安全使用要求。该加固设计可供类似工程参考。

By the investigation of the building in the mill, the phenomenons of the structure eareks are found visibly, and in the middle of span and edge of the beam are cracked seriously. Based on the calculation and analysis of the structure, the reasons of cracking and the loss of loading capacity are studied. In the end, the structure is strengthened with carbon fiber reinforced polymers.