【作者】 张微伟；

【导师】 吴方伯；

【作者基本信息】 湖南大学 ， 结构工程， 2007， 硕士

【摘要】 PK预应力叠合楼板是对传统叠合楼板改进后研究出的一种新型楼板结构,其预制构件底板为预应力带肋薄板,且肋上预留孔洞,施工时将预制底板作为模板,通过预制构件板肋长方形孔洞配置横向非预应力钢筋,再在板拼缝处布置折线形钢筋后浇筑混凝土,待后浇混凝土结硬后即形成PK预应力双向叠合楼板。该楼板结构具有较好的整体性和抗裂性能,并且施工时不用模板和支撑,便于工厂制作,其应用前景广阔。本文在PK预应力叠合板构件研究的基础上,对PK预应力双向叠合楼板做了深入的研究。其主要研究如下:1、对PK预应力叠合楼盖进行了静水加载试验。通过对试验楼盖的变形、应变、刚度、抗裂性等分析,得出PK预应力叠合楼板具有明显的双向受力特性,良好的整体性能和抗裂性能;同时结合试验结果,对PK预应力叠合楼板的荷载传递进行了分析。2、采用大型有限元软件ANSYS对PK预应力叠合楼板的试验模型加载阶段进行了有限元模拟,并与试验结果进行比较;同时还对叠合板弹塑性阶段受力性能进行了初步的分析。3、根据正交各向异性板模型分析建立了刚度比和荷载分配角度的近似关系式,结合试验分析推算出PK预应力叠合板两个方向的近似刚度比,在此基础上应用经典弯曲薄板理论建立了与普通钢筋混凝土双向板类似的弹性计算系数表,同时探讨了PK预应力混凝土叠合板的弹性设计方法。4、对PK预应力混凝土双向叠合板的极限承载力和抗裂性能进行了初步的分析,并提出了近似的计算方法。5、结合具体的实际项目,对PK预应力叠合板的应用优势、使用阶段受力性能及经济效益进行了简要分析,说明此叠合板具有良好的性能和经济效益,是一种值得大力推广应用的新型楼盖结构。更多还原

【Abstract】 PK prestressed composite slab, whose prefabricated component is a prestressed ribbed panel and has preparative holes on its rib, is a new composite floor structure by improving the traditional prestressed composite slab. Under the construction, it uses the prefabricated component as the template; collocates the transverse imprestressed reinforcing steel bar through the rib’s rectangle holes; then moulds concrete after disposing the reinforcing steel bar with the form of broken line in the slit of the slab; and finally the PK prestressed two-way composite slab is formed after the concrete achieves the intensity. This floor structure has the good advantages of integrity and crack-resistance. And with this floor structure, it is useless to use the template and bracing under the construction. So it is convenient for factory working and its applied future is very expansive. This thesis does deep research on the PK prestressed two-way composite slab, based on the researches on PK prestressed composite slab. And all the researches are as follow:1.Do the static water loading experiment on the PK prestressed composite slab. Through analyzing the distortion, strain, rigidity and crack-resistance of the experimental slab, it gets that the PK pre-stressed composite slab has the obvious advantage of two-way working performances, integrity and crack-resistance. And combining with the experimental results, this thesis analyzes the load transfer of PK prestressed composite slab.2. This thesis uses large-scale finite element software ANSYS to simulation PK prestressed composite slab experimental model load stage, and carries on the comparison with the test result; Simultaneously, this study analyzes primarily PK composite slab elastoplasticity stage working performances.3.According to the orthogonal aeolotropic board model analysis, the approximate relative pattern of rigidity rate and the angle of load assignment is founded. And union experiment analysis, the two-way approximate rigidity rate of PK prestressed composite slab is got. Applying the classic elastic plane theory on the base of this, this study has calculated the elastic calculating coefficient tables which are similar to two-way slab of the common reinforced concrete. Furthermore, the elastic design method of PK prestressed two-way composite slab is explored.4.This study also analyzes primarily the limit supporting capacity and crack-resistance of PK prestressed two-way composite slab. And it has put forward the approximate calculating method.5.By integrating with the actual project, the brief analysis of the applied advantages of PK prestressed composite slab, working performances in the using stage and the economic benefit shows that this composite slab has good capability and economic benefit, and it is worth spreading and applying this new floor structure.更多还原