摘要
预应力混凝土连续梁结构的极限承载能力直接影响结构的安全性,是结构工作性能评价中重要指标之一。本文以典型试验梁为例,建立了预应力混凝土连续梁的有限元分析模型,并进行试验加载全过程模拟分析,由此验证有限元分析方法的准确性。合理设计25个考虑受拉区纵向钢筋面积、受压区纵向钢筋面积、混凝土轴心抗压强度、预应力比率和有效预应力等因素的三跨有粘结预应力混凝土连续梁模型,以研究各因素对梁极限承载能力及变形的影响,为该种梁的设计和分析提出相关建议。
The condition of ultimate bearing capacity in bonded prestressed concrete continuous（PPC）beams structure directly relate to structural security, and it is one of the most basicalmark in evaluating the structural operating performance. With simulation analysis of the whole process of a canonical PPC test beam,the accuracy of finite element models is verified by using the experimental data. In order to study the influencing factors for ultimate bearing capacity of bonded PPC beams, twenty five 3-span PPC beam models are conducted to study the influence of longitudinal reinforcement in tensile area, longitudinal reinforcement in compression area, axial compressive strength, partially prestressing pate and effective prestressing force. So the bonded PPC beams can have good bearing capacity and deformation capacity by using the proposed suggestions.
出处
《有色冶金设计与研究》
2017年第1期40-43,51,共5页
Nonferrous Metals Engineering & Research
