【摘要】：大力推進建筑產業(yè)化的今天,混凝土疊合結構得到了迅速的發(fā)展,其中混凝土疊合樓蓋應用最為廣泛。本課題組所研究的PK預應力混凝土疊合板具有施工簡便、承載力高、抗裂性和整體性好、節(jié)約建材、縮短工期等優(yōu)點,應用前景廣闊。本文就是在該疊合樓板已有成果的基礎上進行研究的。目前PK預應力混凝土疊合底板端部預留的胡子筋是主要的梁板節(jié)點構造形式。胡子筋在存放和施工過程中存在很多弊端,對施工效率和施工質量造成影響。新型梁板節(jié)點構造形式是在預制底板端部擺放連接鋼筋,沒有胡子筋,避免了這些問題,但需要通過研究來驗證其受力性能的可靠性。本文對4個中部有橫梁的梁板節(jié)點試件進行單向靜載試驗。通過對比分析各試件的試驗結果,來探究PK預應力混凝土疊合板梁板節(jié)點與普通整澆混凝土梁板節(jié)點受力性能的差異,并綜合評價連接鋼筋的這種節(jié)點構造作法是否能取代胡子筋來滿足梁板節(jié)點的受力要求。對試驗結果進行分析對比發(fā)現,在與通常梁板節(jié)點受力相反的荷載工況下,疊合板梁板節(jié)點在整體受力性能、極限承載力等方面均不如普通整澆混凝土梁板節(jié)點,兩者的受力破壞機制存在差別。疊合板梁板節(jié)點的受力性能主要取決于預制底板與混凝土橫梁的連接性能。在疊合板梁板節(jié)點受力過程中,連接鋼筋和胡子筋所起到的作用相同,兩者的破壞機理一致。只要配備足夠量的連接鋼筋,梁板節(jié)點的受力性能就可以滿足工程要求。甚至在延性和耗能能力方面,連接鋼筋比胡子筋更有優(yōu)勢。但連接鋼筋會對疊合面的受力產生不利影響,而在《預制帶肋底板混凝土疊合樓板技術規(guī)程》中要求胡子筋與連接鋼筋交替布置,消除了這種不利影響,使疊合板梁板節(jié)點更加安全、可靠,完全滿足工程需要。
[Abstract]:Today, with the development of building industrialization, concrete composite structure has been developed rapidly, among which concrete superimposed floor is the most widely used. The competitive prestressed concrete composite slab studied by our research group has the advantages of simple construction, high bearing capacity, good crack resistance and integrity, saving building materials, shortening construction period, and so on. This paper is based on the existing achievements of the composite floor. At present, the beards reserved at the end of competitive prestressed concrete composite bottom slab are the main structural form of beam-slab joint. There are many disadvantages in the storage and construction of beards bars, which affect the construction efficiency and construction quality. A new type of beam-slab joint is constructed by placing connecting steel bars at the end of the prefabricated floor, without beards, which avoids these problems, but it needs to be studied to verify the reliability of its mechanical performance. In this paper, the unidirectional static load tests are carried out on four specimens with beams in the middle of the beam and plate joints. By comparing and analyzing the test results of each specimen, the difference of the mechanical behavior of the competitive prestressed concrete composite beam-slab joint and the common cast-in-place concrete beam-slab joint is explored. And whether the joint construction method can replace the beards bar to meet the stress requirements of the beam-slab joint is evaluated synthetically. Through the analysis and comparison of the test results, it is found that under the load condition contrary to the normal beam-slab joints, the composite beam-slab joints are inferior to the common cast-in-place concrete beam-slab joints in the overall mechanical performance and ultimate bearing capacity. There is a difference in the mechanism of mechanical failure between them. The mechanical behavior of composite beam-slab joints mainly depends on the connection performance of precast floor slab and concrete beam. In the process of bearing the joint of composite plate beam and plate, the connection of steel bar and beards bar plays the same role, and the failure mechanism of them is the same. The mechanical behavior of beam-slab joints can meet the engineering requirements as long as they are equipped with sufficient connecting steel bars. Even in terms of ductility and energy dissipation, connecting steel bars has an advantage over beard bars. However, the connecting steel bar will have a negative effect on the stress on the superimposed surface, and in the Technical Specification for concrete Composite floor Slab with prefabricated ribbed Slab, it is required that the beards bar and the connecting steel bar should be arranged alternately, thus eliminating this adverse effect. So that the laminated beam-plate joints are more secure, reliable and fully meet the engineering needs.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU378

【參考文獻】

相關期刊論文 前6條

1 朱文正;張季超;陳原;王可怡;李明;李火榆;;新型裝配整體式混凝土梁板節(jié)點試驗研究[J];施工技術;2015年03期

2 紀曉東;馬琦峰;王彥棟;錢稼茹;;鋼連梁可更換消能梁段抗震性能試驗研究[J];建筑結構學報;2014年06期

3 楊云俊;薛偉辰;;鋼筋混凝土T型疊合梁靜力性能試驗研究[J];土木工程學報;2010年03期

4 王逢朝;李振寶;呂曉;馬華;;鋼筋混凝土梁屈服后殘余變形特性研究[J];工程抗震與加固改造;2009年02期

5 劉波;李楠;張季超;曹軍偉;;新型混凝土疊合樓蓋梁板節(jié)點構造設計與試驗研究[J];建筑技術開發(fā);2009年03期

6 周曉芬,朱麗松,黃海,周鶴鳴;高效預應力混凝土疊合結構在高層建筑中的應用[J];建筑結構;1997年10期

相關碩士學位論文 前9條

1 邱祺媛;端部開U形槽預制構件疊合梁的試驗研究與工程應用[D];湖南大學;2013年

2 黃婷;PK預應力混凝土連續(xù)疊合板試驗研究與分析[D];湖南大學;2012年

3 董冰;PK預應力混凝土疊合樓板的試驗研究與工程應用[D];湖南大學;2012年

4 黃璐;PK混凝土拼接疊合板受力性能試驗研究與分析[D];湖南大學;2012年

5 潘艷華;PK預應力混凝土疊合板受力性能研究[D];湖南大學;2010年

6 陳科;大跨度PK預應力混凝土疊合板的試驗研究與理論分析[D];湖南大學;2009年

7 張微偉;PK預應力疊合樓板的試驗研究與理論分析[D];湖南大學;2007年

8 周鯤鵬;PK預應力雙向疊合樓板的試驗研究與應用[D];湖南大學;2006年

9 鄭倫存;PK預應力混凝土疊合板的試驗研究與應用[D];湖南大學;2005年

，

本文編號：2410254