摘要
对预应力钢混凝土连续组合梁的承载能力进行分析。分析以求解无黏结体外预应力结构的基本理论框架为基础,重点考虑预应力筋内力增量对钢混凝土连续组合梁承载能力的影响,建立对称集中荷载下两跨预应力连续组合梁的开裂荷载、屈服荷载以及极限荷载这三个特征荷载的计算公式。分析结果表明,建立的计算公式计算三个特征荷载值具有较高的精度,理论计算值和试验值吻合良好,可供工程设计参考。
A bearing capacity analysis is conducted for prestressed continuous steel-concrete composite beams. Based on the principal theory for the solution of externally prestressed structures without bond, accounting for the influence of the increase of tendon force on the bearing capacity of continuous composite beams, formulae for accurately calculating the three characteristic loads, crack load, yield load and ultimate load, of two-span prestressed continuous composite beams under symmetric concentrated loads, are proposed. The calculated load values are in good agreements with the test results.
出处
《土木工程学报》
EI
CSCD
北大核心
2009年第4期38-47,共10页
China Civil Engineering Journal
基金
国家自然科学基金(50438020)
长江学者和创新团队发展计划(IRT00736)
关键词
预应力钢-混凝土连续组合梁
承载力
开裂荷载
屈服荷载
极限荷载
prestressed continuous steel-concrete composite beam
load-carrying capacity
crack load
yield load
ultimate load
