摘要
文中介绍了运用Opensees软件建立无粘结预应力混凝土连续梁有限元模型的方法,对已有文献中的试验梁进行了受力全过程分析,并分析了影响无粘结预应力混凝土连续梁弯矩重分布程度的因素。分析结果表明,按文中介绍的方法建立Opensees数值模型具有一定的合理性和准确性,能够为无粘结预应力混凝土连续梁的数值模拟提供参考;无粘结预应力连续梁中间支座截面弯矩调幅程度不但与其中间支座截面的转动能力有关,还与其中间支座截面区段和跨内截面区段的相对刚度有关。
A method of establishing finite element model of unbonded prestressed concrete continuous beam by Opensees is introduced. Analysis of whole loading process of tested beams in previous literature using method mentioned above has been carried out. Influencing factors in moment redistribution of unbonded prestressed concrete continuous beam has been discuessed.The results show that the numerical model established by Opensees introduced in this paper has certain degree of reasonability and accuracy, which can provide reference for numeriacal simulation of unbonded prestressed concrete continuous beam. Degree of moment redistribution is related to not only the rotation ability of mid-supported sections, but relative stiffness between mid-supported section and in-span ssection.
作者
秦永康
QIN Yongkang(Guangdong Meitallurgical and Architectural Design Institute Co., Ltd., Guangzhou 510080, China)
出处
《低温建筑技术》
2019年第4期58-61,共4页
Low Temperature Architecture Technology
