体外预应力简支梁受力性能研究与非线性分析  

MECHANICAL PROPERTIES AND NONLINEAR ANALYSIS OF SIMPLY-SUPPORTED CONCRETE BEAMS WITH POST-TENSIONED EXTERNAL TENDONS

作　　者：孙海[1] 黄鼎业[1] 王增春 易发安[2] 

机构地区：[1]同济大学预应力研究所,上海市同济大学建工系99博200092 [2]同济大学建设设计研究院

出　　处：《土木工程学报》2000年第2期25-29,共5页China Civil Engineering Journal

摘　　要：根据四根体外预应力简支梁的试验，得出体外预应力简支架在非线性状态下的反应，并利用大变形条件下的杆件结构变形推导了包括几何非线性和材料非线性的单元刚度矩阵，同时编制了非线性有限元程序进行验证。鉴于以往关于体外预应力结构对于预应力筋随外力的变化介绍较少，本文在以往一些学者所作的工作的基础上，提出了预应力筋在转向块处的受力模型，并与本文的试验结果进行比较，结果证明所选用的方法是正确的。Based on the test of four concrete beams with post - tensioned extemal tendons, this paper analyzes the noulinear mechanical properties of these beams. By using of the beam elemnt under large deflection, the material nonlinear and geomentric nonlinear stiff matrix is developed with a program compiled to tesny the entire noulinear procedure. Based on the wwhs of other schalars, a hoe of prestressed tendons especially in the bent - up parts when they are subected to extemal foree is brought forward, and the result of the theoretical analsis is verified by the experimental result to be comet.

关 键 词：体外预应力 非线性 预应力混凝土简支梁 应力 

分 类 号：TU378.201[建筑科学—结构工程] TU378.203