摘要
利用有限元软件AN SY S,建立合理的预应力轻集料混凝土试验梁有限元模型.端部局部承压分析表明:端部压应力在张拉完毕后沿长度方向呈衰减曲线变化.对全部采用轻集料混凝土和端部采用1 m长次轻集料混凝土的试验梁进行对比,轻集料混凝土梁端部最大应力大于规范设计值,有必要在端部采用一定长度的次轻集料混凝土.分析表明端部1m长的次轻混凝土梁的端部应力明显小于其它长度的次轻混凝土梁.
The prestressed lightweight aggregate concrete （LWAC） model is set up by the software ANSYS. The analysis indicates that the tip stress attenuates in length after drawing of prestressed steels. The hollow beam which all adopts the lightweight aggregate concrete is compared with the test beam whose tip adopts lm specially normal density concrete （SDC）. The analysis shows that the greatest tip stress of the LWAC hollow beam is greater than the norm design value, so it is necessary to adopt certain length SDC in tip, and the beam of 1.0m length SDC is smaller than the SDC with other lengths.
出处
《华中科技大学学报（城市科学版）》
CAS
2006年第2期13-16,共4页
Journal of Huazhong University of Science and Technology
基金
国家"863"计划资助项目(2002AA335080)
关键词
轻集料混凝土
次轻集料混凝土
局部承压
预应力
ANSYS
lightweight aggregate concrete
specially normal density concrete
tip bearing
prestressing
ANSYS
