预制矩形腹板的PSRC梁抗震性能试验研究

发布时间：2018-06-20 00:30

本文选题：预制矩形腹板PSRC梁 + 抗震性能　；参考：《苏州科技大学》2017年硕士论文

【摘要】：型钢混凝土结构是混凝土、型钢以及钢筋协同工作的组合结构。型钢混凝土结构兼具钢筋混凝土结构和钢结构的优点,它具有刚度大、抗震及防火性能好等优点。目前型钢混凝土结构已经应用在一些大型超高层建筑中,而在一般高层建筑与多层建筑中却较少使用,最主要的原因是型钢混凝土结构现场施工工序较为复杂,这制约了型钢混凝土结构的发展与推广。预制装配式混凝土结构是首先在工厂生产预制构件,再运至施工现场,最后装配成整体结构。这将简化施工工序,加快施工速度,减少环境污染,符合绿色施工的要求。面对型钢混凝土结构的局限性,通过型钢混凝土结构与预制装配式混凝土结构的整合。国内外专家提出预制装配型钢混凝土(简称为PSRC)结构形式。这是在型钢混凝土结构与预制装配混凝土结构的基础上,将两者创新性结合在一起的结构。本文对预制矩形腹板PSRC梁进行抗震性能试验研究。研究内容如下:(1)对5个预制矩形腹板PSRC梁进行低周反复加载试验。(2)主要研究其破坏模式、滞回曲线、延性、刚度退化、耗能能力、变形恢复能力等性能。(3)分析剪跨比、现浇板混凝土强度对预制矩形腹板PSRC梁抗震性能的影响。(4)结合《混凝土结构设计规范》对预制矩形腹板PSRC梁的开裂弯矩、正截面受弯承载力进行理论推导,通过理论值与试验值对比验证公式的有效性。研究结果表明:增大试验梁的剪跨比可使滞回曲线更为饱满,延性得到改善,耗能能力增强,刚度退化减缓;提高梁上部现浇板混凝土强度,梁的承载力略有提升,但是位移延性系数降低,对刚度退化无明显影响;试验梁开裂弯矩、正截面受弯承载力理论值与试验值较为符合,验证了公式的有效性。
[Abstract]:The steel concrete structure is a combined structure of concrete, steel and steel. The steel concrete structure has the advantages of both the reinforced concrete structure and the steel structure. It has the advantages of large stiffness, good earthquake resistance and good fire resistance. The present steel concrete structure has been used in a large number of super high rise buildings, but in the general high-rise building. The main reason is that the site construction process of the steel concrete structure is more complex, which restricts the development and popularization of the steel concrete structure. The prefabricated concrete structure is first produced in the factory, then it is transported to the present field, and finally assembled into the whole structure. This will simplify the construction. Working procedure, speeding up the construction speed, reducing environmental pollution, conforming to the requirement of green construction. Facing the limitation of the steel concrete structure, through the integration of the steel concrete structure with the prefabricated concrete structure. The domestic and foreign experts put forward the prefabricated steel concrete (called PSRC) structure form. This is the type steel concrete structure and prefabrication. On the basis of assembling the concrete structure, the structure of the two is combined together. The seismic performance test of the precast rectangular web PSRC beams is studied in this paper. The contents are as follows: (1) 5 prefabricated rectangular web plates are subjected to low cyclic loading test. (2) the failure mode, hysteresis curve, ductility, stiffness degradation and energy consumption are mainly studied. Capacity, deformation recovery capability and other properties. (3) analysis of the shear span ratio, the effect of concrete strength of cast in place slab on the seismic performance of precast rectangular web PSRC beams. (4) a theoretical deduction of the bending moment of the precast rectangular web PSRC beam and the flexural bearing capacity of the positive section is derived, and the formula is compared with the experimental values to verify the formula. The results show that increasing the shear span ratio of the test beam can make the hysteretic curve more full, the ductility is improved, the energy dissipation capacity is increased, the stiffness degradation slows down, the strength of the concrete on the top of the beam is improved, the bearing capacity of the beam is slightly improved, but the displacement ductility coefficient is reduced, and the stiffness degradation has no obvious effect. The cracking bending moment of the test beam is not obvious. The theoretical value of the flexural bearing capacity of the normal section agrees well with the experimental value, which verifies the validity of the formula.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9

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