Concrete slab on grade homes are being increasingly elevated above the base flood elevation for mitigation of coastal and inland flooding. This is typically accomplished through placing additional beam and pier supports under a raised slab home. In this process, the slab support conditions are changed from uniform soil support to beam supports. This may lead to unanticipated stress/strain changes, concrete cracks and slab failure. This paper presents a numerical parametric study of such elevated slabs with non-linear finite element approach. The models were calibrated with data obtained from full-scale testing of two concrete slabs under uniform floor load, one of which was retrofitted with external carbon fiber reinforced polymer (CFRP) laminates at critical locations. The slabs were supported by typical wide-flange steel beams over hollow square concrete block masonry piers. The results showed that typical elevated slabs can behave in a brittle manner with low ductility and sudden explosive collapse. A single layer of a uniaxial CFRP application at the negative moment locations increased the floor load capacity by about 30% and more than three times the minimum building code specified live load. Increased beam spacing and lower slab thickness decreased the slab load capacity, as expected.

为了缓解沿海和内陆洪水，等级房屋上的混凝土板越来越多地高出基础洪水高度。这通常是通过在高架平板房屋下方放置额外的梁和墩支撑来实现的。在此过程中，平板支撑条件从均匀的土壤支撑变为梁支撑。这可能会导致意外的应力/应变变化，混凝土裂缝和平板破坏。本文采用非线性有限元方法对此类高架平板进行数值参数研究。使用在均匀地板载荷下对两块混凝土板进行全面测试获得的数据对模型进行校准，其中之一在关键位置用外部碳纤维增强聚合物（CFRP）层压板进行了翻新。平板由空心空心混凝土砌块砌体墩上的典型宽翼缘钢梁支撑。结果表明，典型的高架板表现出脆性，延展性低，爆炸突然坍塌。在负向弯矩位置，单轴CFRP应用的单层将地面承载能力提高了约30％，是最小建筑规范规定的活荷载的三倍以上。如预期的那样，增加的梁间距和较低的板坯厚度降低了板坯的承载能力。在负向弯矩位置，单轴CFRP应用的单层将地面承载能力提高了约30％，是最小建筑规范规定的活荷载的三倍以上。如预期的那样，增加的梁间距和较低的板坯厚度降低了板坯的承载能力。在负向弯矩位置，单轴CFRP应用的单层将地面承载能力提高了约30％，是最小建筑规范规定的活荷载的三倍以上。如预期的那样，增加的梁间距和较低的板坯厚度降低了板坯的承载能力。