摘要
以长洲水利枢纽1#船闸上闸首为例,采用有限元软件,对施工期闸首混凝土浇筑模拟计算,考虑水化热、外界气温、浇筑层厚度之间的相互影响,对闸首混凝土温度变化进行分析。并以温度场的计算成果为前提,采用顺序耦合法对闸首结构混凝土的浇筑进行热-结构耦合计算,分析施工期混凝土结构的应力变化情况。通过对计算成果合理性的验证表明,利用有限元法可较好地对船闸结构进行整体稳定、应力、应变等全方位计算,且具有精度高、形象直观等特点,更好的模拟施工条件对船闸裂缝的影响。
Taking the head bay of the Changzhou hydro-junction No.1 lock for instance, the study was carriedout to analyze the temperature changes of lock head concrete by using the finite element software. With the consider-ation of interaction among hydration heat, air temperature, and layer thickness of structure, analog computation forconcreting of lock head was initialized during construction period. Meanwhile, on the premise of results of tempera-ture field, the changes of concrete stress during construction period were analyzed by using Sequential Coupled-Field Method to initialize the Thermal-Structural Coupling Analysis on concreting of lock head construction. The re-sult of the reasonableness test manifests that ANSYS finite elements software can be applied to calculate the overallstability, stress and strain and other elements in the lock head with high accuracy and vividness, and better simulatethe influence of construction conditions on the ship lock cracks.
出处
《水道港口》
2015年第3期239-243,共5页
Journal of Waterway and Harbor
关键词
船闸裂缝
热力耦合
非线性有限元
lock cracks
Thermal-Structural Coupling
nonlinear finite element analysis
