缓粘结部分预应力连续梁裂缝宽度计算修正浅析  

Calculation Amendments Analysis on Crack Width of Retard-bonded Prestressed Concrete Continuous Beams

作　　者：付强[1] 岳丽莎[1] 金凌志[1] 何培[1] 李月霞[1] 

机构地区：[1]广西矿冶与环境科学实验中心广西岩土力学与工程重点实验室桂林理工大学,桂林541004

出　　处：《混凝土与水泥制品》2014年第4期62-66,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51368013);广西岩土力学与工程重点实验室资助课题(11-cx-04)

摘　　要：在缓粘结部分预应力混凝土两跨连续梁受弯试验研究的基础上,分析了缓粘结预应力连续梁受力过程的破坏形态、缓粘结力筋与普通力筋粘结性能的差别、及其对梁的裂缝间距和钢筋应力的影响。在国家现行规范的基础上对裂缝公式进行了修正,提出了缓粘结部分预应力混凝土梁裂缝宽度的计算公式,计算结果与试验结果吻合较好。Base on the bending test of retard-bonded prestressed concrete continuous beams, the failure mode of the concrete continuous beams, the differences of bond properties between retard-bonded and normal steels and effects of the two bond properties on crack spacing and reinforcement stressare analyzed. The crack spacing calculated formulas are a- mended base on the current national standard specification, and the new crack width calculation formula of retard-bonded prestressed concrete beam is put forward. Meanwhile, the verification results show that calculated results coincide well with the experimental results.

关 键 词：缓粘结预应力 连续梁 裂缝宽度 计算修正 

分 类 号：TU525[建筑科学—建筑技术科学]