钢管高性能混凝土受弯构件的静力性能(Ⅰ):试验研究及有限元模拟  

STATIC PERFORMANCE OF THE HIGH-PERFORMANCE CONCRETE FILLED STEEL TUBULAR FLEXURAL MEMBER(Ⅰ): EXPERIMENTAL STUDY AND FINITE ELEMENT SIMULATION

作　　者：王庆利[1] 刘晓晨[1] 李庆刚[2] 王月[3] 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]辽宁省建筑设计研究院,沈阳110005 [3]辽宁城市建设职业技术学院建筑工程系,沈阳110122

出　　处：《工业建筑》2013年第3期13-17,29,共6页Industrial Construction

基　　金：辽宁省工程建设地方标准编制计划项目(200708)

摘　　要：为给辽宁省地方标准的编制提供依据,对钢管高性能混凝土受弯构件的静力性能展开研究。通过18个试件(内填自密实混凝土的立方试块抗压强度标准值为96 MPa)的静力试验,发现钢管高性能混凝土受弯构件的跨中弯矩-曲率曲线可以分为弹性阶段、弹塑性阶段和下降段。试件挠曲线接近正弦半波曲线,钢管纵向应变基本符合平截面假定,环向受压的钢管对混凝土没有约束力。应用有限元法模拟了试件的跨中弯矩-曲率曲线和变形模态,模拟结果与试验结果吻合良好。总体而言,钢管高性能混凝土受弯构件与普通钢管混凝土受弯构件在静力性能方面没有本质区别。The static performance of the high-performance concrete filled steel tubular flexural members were investigated in order to provide foundation for drawing the relative code of Liaoning Province. On the basis of experimental study on 18 specimens （ the cubic compressive strength of the in-filled self-consolidating concrete was 96 MPa）, it was found that the mid-span moment-curvature curves could be divided into elastic, elasto-plastic and softening stages. The deflection curve was close to sine curve, distribution of longitudinal strain of the steel tube obeyed the plane section assumption, also, the transversely compressed steel tube had no confinement force to the concrete. The mid-span moment-curvature curves and the deformed models were simulated by using FEM and the calculated results checked well with those of tests. In general, there are no essential differences between high- performance concrete filled steel tubular flexural member and normal concrete filled steel tubular flexural member in aspect of static performance.

关 键 词：钢管混凝土 高性能混凝土 受弯构件 静力性能 试验研究 有限元模拟 

分 类 号：TU398.9[建筑科学—结构工程]