Parameter Sensitivity Analysis for Damage of Concrete-filled Quare Tube Space Frame Structure [钢管混凝土空间框架结构模态参数损伤灵敏度分析]

作者：Ni T.-Q.; Tian Y.-M.; Xu C.-X.

来源：Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology, 2019, 41(7): 63-67.

DOI：10.3963/j.issn.1671-4431.2019.07.010

• Concrete-filled square steel tube
• Frame structure
• Modal test
• Sensitivity

Based on the relevant provisions of the current specifications, a 4-storey spatial frame model with 2 spans and 2 rooms was designed and manufactured. The model is made of columns with Concrete-Filled Square Steel Tube(CFSST) and steel beams and composite floor. The model damage level was simulated by loosened bolts at a joint, the frequency sensitivity and modal sensitivity of the modal test was analyzed, and the ability to recognize the damage level and the damage location of the spatial frame structure with CFSST columns and the composite floor was inspected by modal parameters. Experimental results show that the greater the damage degree, the greater the modal test frequency sensitivity coefficient under the same damage location; the maximum and the minimum value of the modal sensitive coefficient tend to appear in damage floor or nearby.

• 单位
  武汉科技大学