摘要
以新疆某大型预应力渡槽为研究对象,应用有限元计算软件模拟了预应力渡槽在完建期和运行期的位移和应力情况,通过在槽身底部和侧墙布置肋梁,能够有效提高槽身抗变形能力,经过计算,该渡槽可满足完建期整个槽身不出现拉应力,运行期渡槽底部拉应力小于混凝土的抗拉强度,但支座处局部出现应力集中现象,应当在支座处加密配筋达到抗裂要求。其计算成果可供实际工程设计时参考。
For a large pre-stressed aqueduct located in Xinjiang Uygur Autonomous Region, finite element calculation software was used to simulate the displacement and stress during construction completing period and operation period. The deformation resistance ability of aqueduct body can be improved by designing rib beams at the bottom and both sides. The results of calculation demonstrate the whole aqueduct body will not have tensile stress during the completing period; the tensile stress at bottom will be less than the tensile strength of concrete during the operation period; stress concentration will occur locally at the support positions which requirs denser reinforcement to prevent crack.
出处
《广西水利水电》
2017年第6期50-53,共4页
Guangxi Water Resources & Hydropower Engineering
关键词
渡槽
预应力
运行期
拉应力
Aqueducti
pre-stress
operation period
tensile stress
