By introducing the structural design features of large - span prestressed hollow plate with cast - in - situ concrete of shooting gym for beijing olympic games , it is expounded section determination of the hollow plate , and is also described some structural measures and construction requirements 摘要通过介绍奥运射击馆工程中，大跨度现浇混凝土预应力空心板的结构设计特点，阐述空心板截面形式的确定，并且对一些构造措施和施工要求进行说明。
The technical specification should be made to pre - pare for pre - stressed reinforced concrete hollow slab design , according to 《 code for design of concrete structures 》 and 《 technical specification of pre - stressed concrete structures with middle strength spiral ribs steel wires 》 根据《混凝土结构设计规范》及《中强螺旋肋钢丝预应力混凝土结构技术规程》 ，编制以中强螺旋肋钢丝为预应力受力筋的空心板的技术条件，为预应力空心板的设计奠定基础。
Use the computer program to calculate the pre - stressed reinforced concrete hollow slab within 6 . 0 ~ 7 . 5m , i propose the appropriate design advice , which provides pa - rameter to the standard chart and technical support to the production of the pre - stressed reinforced concrete hollow slab 利用编制的计算程序对6 . 0 7 . 5米跨的预应力空心板进行计算，提出了相应板的设计建议，为以后标准图的制定提供相应的参数，为预应力空心板的产品换代提供技术支持。
The tradi - tional pre - stressed reinforced concrete hollow slab has not met the needs of the con - struction market , which leads to the shrink of the prefabricate part industry , in order to prosper the prefabricate part industry in our country and make the best of the advan - tages of pre - stressed reinforced concrete hollow slab , we should use the high effective pre - stressed reinforced concrete hollow slab made of high strength material , for the reason that it not only inherits the advantages of the traditional pre - stressed reinforced concrete slab , but also meet the needs of big - span , large - load modern buildings , has better ductility and crack control property , lower cost and more competitive in the mar - ket 传统的预应力空心板已经不能满足建筑市场的要求，也导致我国的预制构件行业的萎缩，为了振兴我国预制构件行业，充分挖掘预应力空心板的优点，利用高强材料生产的高效预应力空心板不仅具有传统的预制板的优点，且能够较好地满足大跨度、大荷载的现代建筑的要求，其延性及裂缝控制性能均优于传统的预应力空心板，而且生产成本降低，具有很强的市场竞争能力。
The results indicate that the ratio of span to rise , the ratio of reinforcement and the stretching controlling stress are the three primary influencing factors to the failure pattern of the slab . in addition , the relationships between the ratio of deflection to span and the ratio of span to rise and the stretching controlling stress submit to linear curves , the relationship between the ratio of deflection to span and the ratio of reinforcement submits to a quadratic parabola curve 运用数值分析程序计算了175组不同跨高比、配筋率、张拉控制应力的中强( 1270mpa )螺旋肋钢丝预应力空心板，结果表明跨高比、配筋率、张拉控制应力是影响空心板破坏形态的主要因素，且构件挠跨比与跨高比和张拉控制应力呈线性关系，与配筋率呈二次抛物线关系。
Middle strength ( 1370mpa ) spiral ribs steel wires is a new type of high strength and good ductility and anchoring strength rolled steel , which is the ideal steel for the high effective pre - stressed reinforced concrete hollow slab . the slab with it has lower price than the traditional ones as well better mechanical property 中强( dw1370 )螺旋肋钢丝是一种强度高、延性好、锚固性能优良的新型材料，是高效预应力空心板的理想的受力钢筋，以这种钢筋为配筋的预应力空心板不仅具有较好的力学性能，满足现代建筑市场对预应力空心板的要求，而且其价格比低于传统的冷加工钢筋。
The strength ductility and crack property of the high effective pre - stressed rein - forced concrete hollow slab with the medium strength spiral - continuous - ribs steel bar can meet the need of the current codes and specification by calculating the normal limit state and ultimate limit state of the pre - stressed reinforced concrete slab with middle strength spiral ribs steel wires 通过对以中强螺旋肋钢丝为受力筋的预应力空心板的承载力极限状态及正常使用极限状态的计算，证明以中强螺旋肋钢丝为受力筋的预应力空心板，其强度、延性及裂缝性能均符合现行规范规程的要求。
Abstract : based on the investigation of one dwelling house in site after fire accident and detection on the structural behavior of its members , the stiffness , crack resistance property and bearing capacity of hollow prestressed slab are discussed and analyzed in this paper . then a feasible rehabilitation scheme is put forward 文摘:通过对某住宅楼火灾现场的调查和构件结构性能检测，讨论分析了火灾后预应力空心板的刚度、抗裂性能、承载力，并提出了可行的加固方案。
As a new variety of steel wire in our country , the mid - strength ( 1270mpa ) spiral - ribs steel wire has many excellences such as high strength , good ductility , credible felting and anchoring capability witn concrete and so on . the pre - stressed concrete slab with this sort of steel wire has good mechanical property . so it is an ideal substitute to the cold - processed wires traditionally adopted in pre - stressed concrete slabs 中强( 1270mpa )螺旋肋钢丝是我国研制开发的预应力钢筋新品种，具有强度高、延性好、与混凝土粘结锚固可靠的优点，以这种钢丝为配筋的预应力空心板具有良好的力学性能，是传统用于预应力混凝土空心板的冷加工钢丝的理想替代品。
In this paper , the prestress increment of the unbonded reinforcement is calculated by the force method of structural mechanics according to the section bend characteristic of unbonded prestressed concrete simple supported beam at the normal use stage . the structural nonlinear and the prestress incremellt of unbonded tendons and the loss of unbonded prestress calculated . the stress of section is gained by the formula of material mechanics and the anchor end ' s eccentricity is taken as the structural eccentricity according to the structural trait of unbonded structure , and some useful conclusions are educed by the comparison with the result of the static test of unbonded prestressed hollow plate 本文根据无粘结预应力混凝土简支梁在正常使用阶段的截面受弯特点，考虑了结构的非线性，记入了预应力钢筋的预应力增量，用结构力学的力法计算无粘结筋的预应力增量；计算了无粘结预应力损失；采用材料力学的公式计算截面的应力，在偏心矩的取值问题中根据无粘结结构的构造特点而采用锚端的偏心矩作为结构的偏心矩计算，与无粘结预应力空心板静载试验值分析比较，得出了一些有益的结论。
