混凝土损伤塑性板静力全曲线显式有限元跟踪  

Explicit Finite Element Tracking of Static Full Curve of Concrete-Damaged Plastic Plate

作　　者：张平 王伟 曾鑫 李泽深 ZHANG Ping;WANG Wei;ZENG Xin;LI Zeshen(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000;Nuclear Industry Shaft and Lane Construction Group Co.Ltd.,Huzhou,Zhejiang 313000)

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000 [2]核工业井巷建设集团有限公司,浙江湖州313000

出　　处：《绍兴文理学院学报》2023年第10期73-80,共8页Journal of Shaoxing University

基　　金：浙江省基础公益研究计划项目“CO_(2)养护再生骨料混凝土叠合板弯曲性能试验研究及数值模拟”(LGF22E080035)。

摘　　要：较之传统的隐式算法,显式算法在求解损伤塑性混凝土(CDP)构件的有限元静力问题方面具有一定优势.采用显式算法对4块不同抗弯纵筋配筋率的有限元CDP板进行静力仿真.仿真给出了板准静力状态下的荷载-位移静力全曲线、能量时程曲线、混凝土受拉损伤等值线图和抗弯纵筋应力等值线图.结果表明:板极限承载力的显式算法模拟结果与理论计算结果的偏差较小;配筋率与极限承载力成正相关关系;板底裂缝的萌发与发展会造成板动能释放,该释放使得荷载-时间曲线产生噪音,噪音程度与配筋率总体上成负相关关系.Compared with the traditional implicit algorithm,the explicit algorithm has certain advantages in solving the finite element static problem of damaged plastic concrete(CDP)members.The static simulation of four finite element CDP slabs with different flexural longitudinal reinforcement ratios was carried out by using an explicit algorithm.The simulation gives a full load-displacement static curve under the quasi-static state of the slab,as well as an energy time history curve,a contour map of the concrete tensile damage and a contour map of the bending longitudinal reinforcement stress.The results show that the deviation is small between the simulation results of the explicit algorithm and the theoretical calculation results of the ultimate bearing capacity of the slab;the reinforcement ratio has a positive correlation with the ultimate bearing capacity;the germination and development of cracks at the bottom of the slab will lead to the release of the kinetic energy of the slab,which leads to the generation of the load-time curve noise whose level is generally negatively correlated with the reinforcement ratio.

关 键 词：结构工程 混凝土板 有限元 损伤塑性模型 静力分析 显式算法 

分 类 号：TU313[建筑科学—结构工程]