摘要
预应力型钢混凝土(PSRC)结构是一种结合预应力混凝土结构与型钢混凝土结构优点的组合结构。为研究预应力型钢混凝土框架的受力性能及弯矩重分布规律,完成2榀接近足尺单跨预应力型钢混凝土框架静力试验,分析其受力过程、破坏形态、裂缝的开展与分布、刚度变化以及内力重分布规律。实验结果表明,预应力型钢混凝土框架梁发生类似于钢筋混凝土适筋梁的正截面受弯破坏,属延性破坏,在达到正截面承载能力极限状态之前基本符合平截面假定。基于实验,提出了考虑次轴力的预应力型钢混凝土框架梁的承载力计算公式。试验弯矩调幅值约为30%,调幅能力高于普通后张有粘结预应力混凝土框架结构。
Prestressed steel reinforced concrete structure（PSRC） is composite structure,which has advantage of both prestressed reinforced concrete structure and reinforced concrete structure.In order to investigate the mechanical behavior and the law of moment redistribution,two large scale prestressed steel reinforced concrete frame were tested and their performance such as failure pattern,crack development,rigidity change were studied.The results show that PSRC is ductile failure and basically meets the plane section assumption.Based on experiments,the bearing capacity formulas considered secondary axial force were put forward.Test moment modulation is 30%,which is higher compared with prestressed reinforced concrete frame.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2011年第6期1-8,共8页
Journal of Sichuan University (Engineering Science Edition)
基金
国家行业标准研究资助项目(2009-1-183)
国家自然科学基金资助项目(51178328)
教育部高等学校博士学科点专项科研基金(20090072110051)
上海市科委科技支撑计划资助项目(09231201102)
铁道部重点课题(2010G009-K)
科技部创新资助项目(10C26213100691)
关键词
预应力型钢混凝土框架
静力试验
塑性铰
内力重分布
弯矩调幅
prestressed steel reinforced concrete frames
static test
plastic hinge
internal force redistribution
moment modulation
