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在曼彻斯特大学,对约束复合板进行一系列耐火试验。在不同火灾场景下,对6块不同荷载比下的复合板进行试验,观察加热和冷却过程中板内力的变化。设计试验方案,建立两种不同的非线性有限元模型,模拟复合板在加热和冷却过程中的热学和力学性能。在热分析模型中,采用平面单元模拟。在结构分析中,混凝土、钢板、锚钉分别采用实体单元、壳单元、桁架单元模拟。混凝土和钢板间的连接简化为弹簧单元。根据试验结果和有限元计算结果,详细分析了复合板的性能。最后,进行参数研究,分析了混凝土强度、钢板厚度和锚钉尺寸的影响。
At Manchester University, a series of fire tests were conducted on constrained composite panels. Under different fire scenarios, six composite plates under different load ratios were tested, and the changes of plate internal force during heating and cooling were observed. Design the test plan, establish two different non-linear finite element models to simulate the thermal and mechanical properties of the composite plate during heating and cooling. In the thermal analysis model, a flat cell simulation is used. In the structural analysis, concrete, steel plate and anchor bolt were simulated by solid element, shell element and truss element respectively. The connection between concrete and steel is simplified as a spring unit. According to the test results and the finite element calculation results, the performance of the composite board is analyzed in detail. Finally, parametric studies were conducted to analyze the effects of concrete strength, plate thickness and anchor size.