2019年1月第35卷第1期沈阳建筑大学学报(自然科学版)Journal of Shenyang Jianzhu University (Natural Science )Jan.2019Vol .35,No .1收稿日期:2018-04-20
基金项目:国家自然科学基金面上项目(51778186);黑龙江省博士后科研启动基金项目(LBH -Q15011)作者简介:王钧(1967—),女,教授,博士,博士研究生导师,主要从事预应力混凝土组合结构方面研究.文章编号:2095-1922(2019)01-0012-08doi :10.11717/j.issn :2095-1922.2019.01.02大尺度预应力型钢-混凝土梁承载力性能模拟
王钧,李世平
(东北林业大学土木工程学院,黑龙江哈尔滨150040)
摘要目的研究大尺度预应力型钢-混凝土梁构件受力性能,进一步扩展大尺度预应力型钢-混凝土梁构件工程应用范围.方法通过对已有试验的预应力型钢-混
凝土梁建模分析,
验证建模分析可靠性.设计7根大尺度预应力型钢-混凝土梁构件,
考虑到型钢翼缘对混凝土的约束效应的影响,将混凝土分为“核心”区与“非核心”
区,采用不同的本构关系模型,以综合配筋率β、型钢含钢量α、混凝土强度等级为参数变量,
分析加载过程中预应力型钢-混凝土梁的力学特性.结果综合配筋率为1.34%的梁构件比综合配筋率为1.04%的梁构件承载力提高19.3%;型钢含钢量为2.36%梁构件相比为1.93%梁构件承载力提高11.3%;混凝土强度等级的改变对大尺度预应力型钢-混凝土梁承载力影响不大.结论预应力型钢-混凝土梁构件建
模分析中,
采用考虑核心约束作用的新型建模分析方法,模拟结果更为精确,为工程实践提供依据的同时,
也为大尺度预应力型钢-混凝土梁更广泛的技术应用提供设计参考.
关键词大尺度;预应力型钢-混凝土梁;核心约束;受弯承载力;数值模拟
中图分类号TU378.2文献标志码A
Simulation of Bearing Capacity Parameters of
Large-Scale Prestressed Steel Reinforced Concrete Beams WANG Jun ,LI Shiping
(School of Civil Engineering ,Northeast Forestry University ,Harbin ,China ,150040)
Abstract :In order to study the mechanical behavior of large-scale prestressed steel reinforced con-
crete beams and extend the scope of its application ,
the model of the existing prestressed steel rein-forced concrete beams was built and the reliability of modeling analysis was verified.Based on the
analysis ,
7large-scale prestressed steel reinforced concrete beams were designed.Considering the constraints of steel flange to concrete ,
concrete is divided into two parts :core area and non-core ar-ea ,
using different constitutive relation models.Parameter variables ,including comprehensive rein-forcement ratio ,steel content of section steels and concrete strength grade ,were used to analyze the mechanical properties of the prestressed steel reinforced concrete beam during the loading process.