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后张现浇有粘结预应力混凝土楼板技术福建省建科院结构研究所一直致力于开展现代预应力混凝土技术的研究、开发和推广工作,在国内首先将有粘结预应力混凝土技术应用于楼板中,经不断地研究、完善设计理论和施工技术,在设计的配筋指标和成套施工技术方面都达到了国内先进水平。有     

27m跨双向无粘结预应力井字梁施工

随着大型公共建筑、饭店、宾馆工程的增多,大跨度大厅楼盖结构的设计与施工已成为一个重要课题。我国无粘结预应力技术在大跨度楼板中的推广应用及大跨度梁等的试验应用证明,无粘结预应力大跨度结构具有施工简便、缩短工期、降低结构高度等优点,引起了建筑界的重视。     

建筑工程平板结构有粘结预应力施工技术分析探讨

本文结合工程实例,分析了有粘结预应力平板结构楼板的技术特点,并结合施工流程,详细阐述了有粘结预应力楼板结构施工技术及质量控制措施,实践证明,有粘结预应力无梁楼板结构具有良好的实用效果。     

有粘结预应力无梁楼板深化设计与施工

结合广州某学院设计教学楼工程的具体情况,介绍了有粘结预应力无梁楼板的深化设计及施工技术,总结了有粘结预应力混凝土技术的优势,以推广该施工工艺在工程中的应用。     

北京永安公寓无粘结预应力板墙体系施工

北京永安公寓工程采用7.2m大开间剪力墙及后张无粘结预应力现浇混凝土平板结构体系。混凝上墙厚16cm,200号混凝土。现浇楼板厚16cm,300号混凝土。现将其施工情况介绍如下。一、施工准备及部署根据施工现场条件和生产任务安排制定施工方案。墙体施工分两段流水,顶板(预应力筋通长铺设)施工不分段。结构工期约15天一层。选用TQ60/80塔吊一台,臂杆长30m。无粘结预应力钢筋由北京市建筑工程研究所加工后运至现场,并负责预应力筋铺放及张拉技术指导。     

有粘结预应力技术在建筑工程楼板结构施工中应用

本文结合工程实例，分析介绍了有粘结预应力平板结构楼板的技术特点，并结合施工流程，详细阐述了有粘结预应力楼板结构施工技术及质量控制措施，实践证明，有粘结预应力无梁楼板结构具有良好的实用效果。     

预应力混凝土薄板叠合楼板生产工艺

预应力混凝土薄板即永久性预应力混凝土模板。它既是永久性混凝土底模,又是楼板结构的一部分,从而形成现浇与预制相结合的楼板体系。这种楼板结构体系整体性好,施工简便,可缩短工期,节约木材,因此有较好的技术经济效果。1980年下半年我厂配合北京市建筑工程研究所进行了预应力混凝土薄板叠合楼板的试制试验工作,现将其生产工艺及体会简述如下。     

有粘结预应力楼板设计的几个问题

有粘结预应力混凝土楼板的强度、抗裂度、抵抗灾害能力以及经济指标优于无粘结预应力混凝土楼板，但在设计上尚有待规范。结合国外规范及工程实践，作者认为我国规范对预应力筋的设计强度规定偏于保守需要予以修订，同时提出了有粘结预应力混凝土楼板拉应力控制、普通钢筋设置和间距的设计建议，以期在我国进一步推广该项技术。     

停车库无粘结后张预应力现浇平板施工

1986年兴建的泰国曼谷叔伯康大厦附属停车库是七层现浇板柱结构的工程,楼板采用无粘结后张预应力混凝土施工工艺。无粘结预应力平板是一种新的楼盖结构,曼谷已广为应用,除停车库外还用于高层公寓和旅馆、百货大楼等,是由专门公司承担设计和施工的。与一般结构相比,它可以加大结构跨度,降低建筑层高,减少楼板用钢     

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。     

无粘结预应力井式梁板悬挂技术夹层升板结构

本文介绍一种新的结构体系——无粘结预应力井式梁板、悬挂技术夹层升板结构。井式梁板中靠近柱子的主梁为无粘结预应力连续双梁,次梁为非预应力连续梁,技术夹层为厚8厘米的钢筋混凝土平板,用钢吊杆悬挂于井式梁的交点下,并与井式梁楼板一同提升。 本文主要结合具体工程——无锡第一棉纺织厂介绍这一体系的设计和施工方法。     

预应力现浇混凝土管式空心楼盖承载性能试验研究

为研究无黏结预应力现浇混凝土管式空心楼盖的受力性能,制作了一个1/4缩尺比例的无黏结预应力现浇混凝土管式空心板柱结构试验模型,通过在试验模型管式空心楼盖上施加竖向均布荷载的试验表明,该楼盖结构具有一定的承载能力,在荷载作用下各区格板发生竖向位移后,表现形状为"碗形",最大挠度发生在管式空心楼盖各区格板的跨中。有限元计算分析结果进一步说明,无黏结预应力现浇混凝土管式空心楼盖由于空心管的平行布置而呈现正交各向异性,在平行布管方向,楼板的连续性遭到破坏,楼板刚度削弱程度较大。在平行布管方向和垂直布管方向,无黏结预应力管式空心楼盖的变形仍可按连续板跨考虑。     

Whole-building behaviour of bonded post-tensioned concrete floor plates exposed to fire

This paper discusses the whole-building behaviour of post-tensioned concrete floor plates under fire conditions. Based on the results of eight fire tests on one-way spanning bonded post-tensioned concrete slab strips, recently conducted by the authors, a nonlinear finite element model was developed to model an entire typical concrete floor plate. The considered floor plate was post-tensioned using bonded tendons and was supported on traditional reinforced concrete columns. The overall objective of the study was to provide an understanding of the structural response and modes of failure of these floor plates under fire conditions. The mechanical and thermal material nonlinearities of the floor’s components, consisting of the concrete, grout, prestressing tendon, and the anchorages, as well as the reinforced concrete columns, have been considered in the model. The interface between the tendon and grout was also considered, allowing the bond behaviour to be modelled and the tendon to retain its profile shape during the deformation of the floor. The model has been validated against published finite element results on a floor plate under normal temperature conditions. The temperature distribution throughout the floor slab and supporting columns, together with the developed displacement and stress due to heating, and the overall fire resistance of the floor were predicted by the model. Furthermore, the variables that influence the structural behaviour comprising different natural fires, applied static load during fire, use of non-tensioned reinforcement, as well the difference between unbraced and braced frames were investigated in a parametric study. The study has shown that the failure mode of the floor under fire conditions is mainly due to tensile splitting along the tendons that extended to the top surface, while at ambient conditions the mode of failure is punching shear. The restraint provided by shear walls in the considered braced frame and the use of non-tensioned flexural reinforcement affected the vertical displacement behaviour under fire conditions, but did not affect the fire resistance due to the predicted tensile splitting failure mode. From the studies presented it is concluded that the design fire resistance of the floor specified in Eurocode BSEN1992-1-2 is acceptable, while that in the UK code BS8110 is unconservative and should be modified.     

现浇预应力混凝土连续箱梁高架桥施工技术

介绍现浇预应力混凝土连续箱梁高架桥的关键技术，该施工技术在宁夏地区首次使用，包括施工方案的确定，WDJ碗口式多功能脚手架的推广应用，高标号混凝土的施工，后张法预应力钢绞线的施工方法。     

Structural performance of a post-tensioned concrete floor during horizontally travelling fires

This paper highlights the structural performance of a bonded post-tensioned concrete floor subject to fires that travel horizontally between zones within the floorplate. The floorplate was previously analysed by the authors based on experimental and numerical investigations on one-way spanning bonded post-tensioned concrete slab strips. In the previous studies, a nonlinear finite element model was developed for the floor that considered the mechanical and thermal material nonlinearities of the floor’s components, interfaces between the components, different natural fire severities, different applied static load during the fire and different restraint conditions. The previous studies highlighted the importance of investigating the whole-building behaviour and provided a useful insight into the temperature distribution throughout the floor slab, failure modes, comparisons with current design rules and time-displacement behaviour of the floor under fire conditions. This paper extends the previous studies and uses the validated finite element model to investigate different horizontal travelling fire scenarios between zones and different inter-zone time delays to represent fire travelling time. The time-temperature distribution throughout the floor slab was predicted at different locations in the floor subject to travelling fires. Furthermore, the time-deflection and time-axial displacement relationships were predicted at different locations in the floor. The current study has shown that horizontally travelling fire scenarios and the inter-zone time delay affect the time-deflection behaviour considerably. The change in heating/cooling scenarios between zones has resulted in a cyclic deflection pattern, which has previously not been considered when designing post-tensioned concrete floors against fire. Based on the analysis of the results presented, it is shown that the worst case in terms of maximum vertical defection or maximum residual deflection, at a given point in the floorplate, could occur either under the assumption of a uniform fire or a travelling fire. It is therefore recommended that designers should consider the integrity of floorplates using various travelling fires.     

南京南站“桥建合一”型钢混凝土组合结构承轨层施工技术

南京南站轨道层是桥建合一高架承轨层,结构形式为型钢混凝土组合结构,建筑设计要求梁底混凝土达到饰面清水混凝土要求。针对该状况,分析了施工技术难点及整体施工方案,对大型公共建筑水平梁板结构大规模应用型钢混凝土组合结构节点深化设计、支架体系、模板设计、钢筋绑扎、混凝土施工、工程检测等关键技术进行了系统研究。经过工程实践,该施工技术成功满足了设计要求,施工质量良好。     

青岛体育中心综合训练馆大跨混凝土楼盖振动舒适度测试与分析

通过建立竖向振动舒适度长期监测系统,测试了青岛体育中心综合训练馆大跨度混凝土楼盖在主体结构完成、木地板铺设完成、整体结构完成等4个典型阶段的动力特性;实测了在单人行走、多人齐步行走、多人跳跃、多人随机及正常比赛训练等多种激励情况下结构楼面的加速度反应,并与有限元分析及英国混凝土协会建议的计算方法（CCIP-016）进行...     

重庆金汤大厦后张预应力混凝土结构设计

金汤大厦是一幢综合性商住楼.针对该楼后张预应力混凝土结构设计,特别是考虑施工阶段的问题以及两跨预应力连续梁测试的部分情况作了介绍.     

后张预应力混凝土结构设计中的几个概念问题

针对后张预应力混凝土结构设计中有关最佳平衡荷载，平衡荷载效应，控制合理预应力钢筋用量的最主要因素，楼盖平板上扁梁的内力分析以及预应力钢筋形状等概念问题进行了讨论，并提出了设计建议     

广州国际会展中心(二期)超长多跨连续无粘结预应力结构深化设计

广州国际会展中心(二期)结构为超长多跨连续框架肋梁板体系,属大体积混凝土结构.为防止大体积混凝土的温度应力和收缩应力导致出现裂缝而影响结构的安全和使用功能,各区的楼板和部分梁拟采用后张无粘结预应力混凝土技术.预应力的深化设计不但要满足抗裂要求,而且应密切联系施工过程,使设计便于现场施工.因此,本文还提出了预应力钢筋的张拉原则和布筋原则.从现场施工情况看,顸应力深化设计较好地满足了要求.