【摘要】 为了研究叠合层内管线埋设不同位置对叠合板承载性能的影响，确定管线埋设的“安全区”,设计了1组叠合层内无预埋管线和3组叠合层内不同位置布置管线的叠合板试件进行足尺对比试验，根据试验得到各组试件的承载力、挠度和应变等物理力学指标，分析其破坏形式和受力特性。试验结果表明：叠合层内管线的存在导致叠合板刚度减小，变形增大；管线对叠合板承载性能的影响程度与其埋设位置有关，随着管线埋设位置向跨中截面靠近，其对叠合板承载性能的影响越来越大；在距支座中心截面1/3跨度范围内的叠合层中布置管线对叠合板承载性能影响较小，该范围可视为管线埋设的“安全区”。更多还原

【Abstract】 In order to study the influence of embedding position of the pipeline on the bearing capacity of composite plates and to determine the “safety zone” of embedded pipelines, a set of composite plate specimens without embedded pipelines in a composite layer and three sets of composite plate specimens with different embedded positions of pipelines in a composite layer are designed for full-scale tests. Combined with the experimental observations, the physical and mechanical indexes, such as the bearing capacity, deflection and strain of each specimen, are summarized and compared and the failure modes and mechanical characteristics are analyzed. The experimental results show that the presence of the composite layer within the pipelines can lead to a decrease in composite plate stiffness and an increase in deformation. The influential extent of pipeline on the bearing capacity of composite plates is related to its embedding position. As the embedding position of the pipeline approaches the mid-span section, the influence of pipeline on the bearing capacity of composite plates becomes greater. The bearing capacity of laminated plates is seldom affected when the pipeline is located in the one third span of the cross section from the support center, which can be regarded as the “safe zone” of the pipeline embedded.更多还原