双筋矩形混凝土墩柱开裂刚度分布特性分析  

Analysis of Rigidity Distribution of Crack of Double-reinforcement Rectangular Concrete Piers

作　　者：苗宇[1,2] 郑罡[2] 李贵乾[1,2] 高波[1,2] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆交通科研设计院桥梁工程结构动力学国家重点实验室,重庆400067

出　　处：《公路交通技术》2010年第3期62-64,68,共4页Technology of Highway and Transport

基　　金：国家自然科学基金(50878220);重庆市杰出青年科技基金(CSTC;2008BA6039);交通部西部交通建设科技项目(200731882233)

摘　　要：以双筋矩形混凝土墩柱构件为对象,从基本的力学概念出发,运用无量纲分析方法,讨论构件在弹性范围内受弯开裂时的截面受压区高度与刚度分布特性。以此为基础,从理论上提出混凝土受弯构件开裂后弯曲刚度的"三段式"近似模拟方法,对钢筋混凝土墩柱构件等效刚度的相关理论研究及试验研究工作具有一定参考价值。Based on the double-reinforcement rectangular concrete pier members as object and starting from the fundamental mechanical concepts,this paper discusses distribution characteristics of height and rigidity of structures in sectional compression zone during flexural crack within elastic range by means of dimensionless analysis method.On the basis of this discussion,the paper proposes in theory a ＂three-stage＂approximate simulation method for bending rigidity after cracking of flexural concrete members,presenting a certain reference for related theoretical and test studies on equivalent rigidity of reinforced concrete pier members.

关 键 词：开裂刚度 混凝土墩柱 无量纲分析 刚度分布 

分 类 号：U448.34[建筑科学—桥梁与隧道工程]