钢筋网片作用下梁端塑性铰耗能能力研究

发布时间：2017-12-31 22:32

本文关键词：钢筋网片作用下梁端塑性铰耗能能力研究　出处：《吉林建筑大学》2016年硕士论文　论文类型：学位论文

【摘要】：在通常的结构抗震设计中,大部分研究人员都推荐框架结构体系应当采用“强柱弱梁”的设计理念,这样可以将地震能量分散在结构的梁端,并降低柱端的延性要求。因此,在进行“强柱弱梁”理念设计时,通常可以采用较低的设计地震力而靠梁端塑性铰来耗散地震能量。但是这样却导致结构可能在中等强度的地震作用下,这些预期的塑性铰发生破坏,无形间增加了修复费用。本文通过在梁端塑性铰区域加入钢筋网片,利用钢筋网片加强对混凝土的侧向约束作用,提高梁端塑性铰的耗能能力和结构的延性,从而提高钢筋混凝土结构的抗震性能;同时,在保证截面抗弯能力的情况下,提高抗剪能力,减小塑性铰区域的损伤。采用大型通用有限元软件ABAQUS,对不同钢筋网片作用下分别进行建模和加载,分析对比计算结果,综合评价梁端塑性铰的耗能能力。对梁端塑性铰区域加入钢筋网片的不同情况进行试验研究,比较分析钢筋网片对梁端塑性铰耗能能力和结构延性的影响。研究结果表明:梁端塑性铰区域加入钢筋网片能充分利用结构的延性来降低外荷载的作用,使结构在屈服后有较大的变形能力,从而提高梁端塑性铰的耗能能力,更易实现“强剪弱弯”的设计理念,又提高了钢筋的利用率,还有利于对塑性铰区域的震后修复工作。
[Abstract]:In the seismic structure of the usual design, most of the researchers recommended frame structure system should adopt the design idea of "strong column and weak beam", which can be dispersed in the seismic energy structure of the beam end, and reduce the requirements of ductility column end. Therefore, the "strong column and weak beam" design concept, commonly used seismic design force low and rely on the beam plastic hinge to dissipate seismic energy. But this has led to structure the moderate intensity earthquake, the expected plastic hinge failure, invisible increased repair costs. This paper at the end of the beam plastic hinge region with mesh reinforcement in use steel mesh strengthening lateral restraint effect on concrete, improving the ductility and energy dissipation capacity of the structure of beam end plastic hinge, so as to improve the seismic performance of reinforced concrete structures; at the same time, in order to ensure the flexural capacity under the condition. High shear capacity, reduce the damages to the plastic hinge area. By using the large-scale general finite element software ABAQUS on different mesh reinforcement under respectively modeling and loading, analysis and comparison of the computational results, the plastic hinge energy dissipation capacity evaluation of end beam. The beam plastic hinge region was studied with different reinforcement conditions the steel mesh, comparative analysis of the effect of mesh reinforcement in beam end plastic hinge energy dissipation capacity and ductility of the structure. The results show that: the beam plastic hinge region with reinforced net can make full use of the ductility of the structure to reduce the external loads, the structure has large deformation ability in yield, so as to improve the the beam plastic hinge energy dissipation capacity, more easy to realize the design concept of "strong shear weak bending", and improve the utilization rate of steel, but also conducive to the repair work after the earthquake of the plastic hinge region.

【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU352.11

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