预应力连续组合梁负弯矩区受弯全过程分析  

Whole Process Analysis of Flexural Behavior of Negative-moment Region in Pre-stressed Continuous Composite Beam

作　　者：胡少伟[1] 叶祥飞[2] 

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]中国水电工程顾问集团公司中南勘测设计研究院,湖南长沙410014

出　　处：《水电能源科学》2013年第12期122-125,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(51279111);中央级公益性科研院所基金资助重大项目(Y410006);江苏省水利科技基金资助项目(2012001-3)

摘　　要：利用全过程分析研究了预应力连续组合梁负弯矩区的抗弯性能。通过材料本构关系分析,采用共轭梁法、弯矩曲率法对组合梁从加载至破坏全过程进行了非线性分析,通过反复迭代计算获得组合梁截面的弯矩—曲率(M-φ)关系,据此进一步求得组合梁截面给定荷载下的挠度,得到组合梁应变—荷载特征曲线和全过程计算流程方法。为验证推导结果的正确性,将计算结果与已有的试验结果相对比,表明所建组合梁负弯矩区全过程计算模型与试验结果吻合良好。The whole process analysis is used to study the bending capacity of pre-stressed continuous beam in the negative moment region. Based on the material constitutive relation, the whole process of nonlinear analysis from loading to destroying is carried out by using conjugate beam method and bending curvature method. And then the moment-curva- ture relation（M--φ） of the cross-section is obtained by iterative calculation. Accordingly, this paper calculates the deflec- tion of composite beams section under a given load. Finally, it obtains the strain-load characteristic curve and the whole process calculation method. To verify the correctness of the method, the computed results are compared with the experi- mental results, it shows that the proposed model are in good agreement with the test results.

关 键 词：预应力 连续组合梁 负弯矩区 弯矩曲率法 全过程分析 

分 类 号：TU317.1[建筑科学—结构工程] TU398