【作者】 刘承斌； 王柏生； 李玉刚； 杨英武；

【机构】 浙江大学土木系；

【摘要】 本文将损伤指标应用在钢桁架-砼组合板的损伤检测中,拓展了损伤指标的研究领域。但2是,对于哪一种识别方法是最有效的,目前尚不清楚。为此,我们按比例制作了2榀立体桁架模型,首先测得钢桁架-砼组合板完好状态时的模态参数,随后共模拟了4种不同位置损伤情况,然后测得损伤情况下的模态参数,从而构造COMAC法、ECOMAC法、柔度法、刚度法、β法和模态曲率法,文中主要比较了6种不同的损伤指标方法对钢桁架-砼组合板的损伤位置的识别效果。结果表明:β法适用于检测腹杆损伤位置,模态曲率法可用于混凝土板损伤位置,而其它四种方法则由于精度不能满足要求不适用于该类结构。更多还原

【Abstract】 Damage index is used in steel-concrete composite slabs with steel truss in this paper, however , which damage index is effective is not clear. Therefore, two scaled models were made clear. First, model parameters were acquired through experiment when models in good condition. Then, four different location damages were simulated and model parameters were tested again, therefore, COMAC method、ECOMAC method、flexibility method、rigid method、 βmethod and curvature modes method are formed . Six different damage index methods are compared to identify effect of damage location. Results show:βmethod is suitable for web member’s damage identification; curvature modes method is suitable for that of concrete slab; however, for error, other four methods are not suitable for this type structure’ damage identification.更多还原