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在无粘结预应力结构中,预应力束可以在混凝土中滑动,但在张拉过程中仍存在着一定的摩擦阻力,特别是当连续结构的跨数较多、每跨跨长较大时,无粘结预应力束的张拉力摩擦损失有相当数值,需要在设计中准确计算。目前国内有关结构设计规范未对这类情况予以规定,为此结合天津第六棉纺织厂无粘结预应力连续井式梁升板结构工程(以下简称天津工程)和构件张拉试验,对
In the unbonded prestressed structure, the prestressed beam can slide in the concrete, but there is still a certain frictional resistance during the tensioning process, especially when the number of spans of the continuous structure is large and the length of each span is large. The friction loss of unbonded prestressed bundles has considerable values and needs to be accurately calculated in the design. At present, China’s relevant structural design codes do not provide for this type of situation. For this purpose, the unbonded prestressed continuous well beam riser structural engineering (hereinafter referred to as the Tianjin project) and the component tension test are combined with Tianjin No. 6 Cotton Textile Factory.