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Seismic Performance Tests of Prefabricated Concrete Frames with Embedded Composite Lightweight Aggregate Partition Wall Panels
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摘要: 为了研究内嵌复合轻集料隔墙大板装配式钢筋混凝土(RC)框架的抗震性能,对1榀装配式混凝土空框架、1榀加气混凝土砌块填充墙-装配式混凝土框架和1榀复合轻集料墙板-装配式混凝土框架进行了低周往复荷载试验。研究了地震作用下墙板与框架的协同受力性能和工作机理,分析了结构的破坏特征、荷载-位移曲线、刚度退化、延性性能以及耗能能力等。试验结果表明:复合轻集料隔墙大板内嵌连接安全可靠,有效确保了复合轻集料墙板与框架在地震作用下的协同工作;与加气混凝土填充墙相比,复合轻集料大板对框架的极限水平承载力和初始刚度均显著提高;复合轻集料墙板-装配式RC框架的弹性位移角平均值θy及弹塑性极限位移角平均值θu均满足GB 50011—2010《建筑抗震设计规范》要求;基于试验结果,提出了结构的恢复力模型,并验证了模型具有很好的吻合度,为内嵌复合轻集料隔墙大板在装配式结构中的应用提供了理论依据。Abstract: In order to study the seismic performance of a prefabricated RC (reinforced concrete) frame with embedded composite lightweight aggregate partition wall panels, quasi-static load tests were carried out on one trusses of prefabricated concrete empty frame, one trusses of aerated concrete block filled wall-prefabricated concrete frame and one trusses of composite lightweight aggregate wall-prefabricated concrete frame. The cooperative mechanical properties and working mechanism of wall panels and frame under earthquake were studied, and the failure characteristics, load-displacement curve, stiffness degradation, ductility and energy dissipation capacity of the structure were analyzed. The test results showed that the embedded connections of the composite lightweight aggregate partition wall panels were safe and reliable, which could effectively ensure the cooperative work of composite lightweight aggregate wall panels and frame under the action of earthquake. Compared with the aerated concrete filled wall, the ultimate horizontal bearing capacity and initial stiffness of the composite lightweight aggregate wall panels were significantly increased. The mean value of elastic displacement angle θy and the mean value of elastic-plastic limit displacement angle θu of composite lightweight aggregate wall-prefabricated concrete frame could meet the specification requirements. Based on the test results, the restoring force model of the structure was proposed, and the good coincidence of the model was verified, which provided a theoretical basis for the application of the embedded composite lightweight aggregate partition wall panels in prefabricated structures.
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