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APPLICATION OF RETARD-BONDED PRESTRESSED TECHNIQUE IN CONCRETE GRID-BEAM STRUCTURE
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摘要: 介绍了缓粘结预应力技术在承德市城市展览馆32.4m33.2m跨周边不规则井字梁中的应用,介绍了井字梁预应力筋的设计计算方法,根据平衡荷载大小计算了预应力次弯矩和预应力反拱,计算了考虑次弯矩后缓粘结预应力混凝土梁的名义拉应力、极限承载力,为缓粘结预应力混凝土梁、特别是大跨度井字梁的设计计算提供参考。Abstract: The application of retard-bonded prestressed technique is introduced in the design of concrete grid-beam structure with the span of 32.4 m33.2 m with irregular boundary condition of Chengde City Museum.The design method of prestressed concrete grid-beam structure is introduced,and the secondary moment of prestressing is calculated according to the balanced loads of prestressing considered in the design.The nominal stresses and ultimate moments of the concrete girders are calculated considering the secondary moments.The design method can be referenced in the designing of retard-bonded prestressed concrete beams especially for that of the grid-beam structures.
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Key words:
- retard-bonded /
- prestressed concrete /
- grid-beam /
- structure secondary moment
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[2] 赵建昌,王起才.缓粘结预应力混凝土结构试验研究.铁道学报,2002,24(2):95-98 王起才,王永逵.预应力混凝土体系中的缓凝砂浆研究.混凝土,1995(4):44-47 [3] 王起才.缓粘结预应力混凝土构件试验研究.铁道学报,2001,23(1):91-94 [4] 李佩勋,尚仁杰,吴转琴,等缓粘结预应力筋:中国,ZL02240778.2.2003-07-30 [5] 曾昭波.缓粘结预应力体系力学性能的试验研究:[学位论文].北京:中冶集团建筑研究总院,2005 [6] 刘文华,刘立军,朱龙,等.缓粘结预应力钢绞线的试验研究.建筑技术,2003,34(12):917-918 [7] 王宇新.有粘结预应力在钢筋混凝土井字梁中的应用.山西建筑,2003,29(3):29-30 [8] JGJ/T 92-2004 无粘结预应力混凝土结构技术规程 [9] GB 50010-2002 混凝土结构设计规范 [10] 林同炎,伯恩斯.预应力混凝土结构设计.路湛沁,译.北京:中国铁道出版社,1983:224-232 -
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