赣州西站站房缓粘结预应力技术结构设计与分析

赣州西站主站房高架候车层具有跨度大、预应力体量大、梁柱节点核心区密集等特点,采用缓粘结预应力技术。对超长结构楼板温度效应以及结构大跨梁受力进行整体分析计算,同时利用有限元软件计算模拟,总结缓粘结预应力在超长结构混凝土板、梁的设计方法及施工验算,结果表明:1)计算温度效应对结构楼板带来的影响时,需综合考虑楼层高度,并考虑竖向构件对楼板的约束作用,楼层越高,竖向约束作用越小,楼板温度应力释放越多;2)缓粘结预应力筋适合运用在大跨公共建筑中,特别是在后期改造和密集节点核心区的穿行处理上具有优势。

Design and analysis of slowly-bonded prestressed structure of Ganzhou West Railway Station

The elevated waiting layer for the main station building of Ganzhou West Railway Station has the characteristics of large span,large prestress,and dense core area of beam-column joints.It adopts slowly-bonded prestressed technology.The overall analysis and calculation of the temperature effect of the super-long structure floor and the stress of the large-span beams of the structure were carried out.At the same time,the finite element software was used to calculate and simulate.The design methods and construction calculations of slowly-bonded prestressed concrete slabs and beams in super-long structures were summarized.The results show that:1)When calculating the effect of temperature effects on structural floors,the floor height and constraints of vertical members on floors need to be considered comprehensively,and the vertical restraint and the thermal stress release of the floor are in positive proportion to the floor height;2)the slowly-bonded prestressed tendons are suitable for use in large-span public buildings,especially for the later stage transformation and handling the passage of the dense joint core area.