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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年03期

页码:

37-47

栏目:

建筑结构

出版日期:

2025-05-30

文章信息/Info

Title:

Numerical simulation study on flexural and shear behavior of concrete beam with steel-bar truss

文章编号:

1673-2049(2025)03-0037-11

作者:

张鹏程^1,2,郑少锋¹,王权民³,卫振海⁴,林新强⁵,廖金杰⁵,陈平阳⁶

(1. 厦门大学 建筑与土木工程学院,福建 厦门 361005; 2. 厦门大学 福建省滨海土木工程数字仿真重点实验室,福建 厦门 361005; 3. 闽南科技学院 土木工程学院,福建 泉州 362332; 4. 中国人民解放军国防大学联合勤务学院,北京 100858; 5. 厦门雅众建设集团有限公司,福建 厦门 361006; 6. 福建磊鑫集团有限公司,福建 厦门 361006)

Author(s):

ZHANG Pengcheng^1,2, ZHENG Shaofeng¹, WANG Quanmin³, WEI Zhenhai⁴, LIN Xinqiang⁵, LIAO Jinjie⁵, CHEN Pingyang⁶

关键词:

钢筋混凝土梁;  钢筋桁架;  斜腹筋;  受弯性能;  受剪性能;  数值模拟

Keywords:

reinforced concrete beam;  steel-bar truss;  diagonal web reinforcement;  flexural behavior;  shear behavior;  numerical simulation

分类号:

TU375

DOI:

10.19815/j.jace.2023.12094

文献标志码:

A

摘要:

通过在普通混凝土梁钢筋笼中加焊斜腹筋可以制成钢筋桁架来承担施工荷载,从而免设支架支撑。为研究钢筋桁架免支模施工是否会影响梁的后期受力性能,建立了钢筋桁架混凝土梁与普通钢筋混凝土梁的精细有限元模型,分析对比其性能差异。结果表明:对于一般的简支梁,为免支模所增加的斜钢筋用量约为原梁钢筋总量的12%,施工阶段钢筋桁架可只承担其自重施工荷载,相应的受力钢筋最大强度应力比不大于0.2; 钢筋桁架不改变梁受拉钢筋面积,建成后梁正截面受弯承载力提高,延性更好; 斜截面受剪与设置弯起钢筋效果相同,可按照规范公式计算。

Abstract:

By welding diagonal web reinforcement in the steel cage of ordinary concrete beams, the steel-bar truss can be made to bear construction loads, so as to avoid the support of the brackets. In order to study whether the use of steel-bar truss without formwork construction will affect the later stress performance of the constructed beams, a detailed finite element model was established to analyze and compare the performance differences between reinforced concrete truss beams and ordinary reinforced concrete beams. The results show that for general simply supported beams, the amount of diagonal steel bars added to avoid formwork is about 12% of the total amount of steel bars in the original beam. During the construction phase, the steel-bar truss can only bear its own weight construction load, and the maximum strength stress ratio of the corresponding stressed steel bar is not greater than 0.2. The steel-bar truss does not change the area of tensile steel bars in the beam, and after completion, the bending capacity of the beam cross-section is increased, resulting in better ductility. The effect of inclined section shear is the same as that of setting bent steel bars, and can be calculated according to the standard formula.

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备注/Memo

备注/Memo:

收稿日期:2023-12-05
基金项目:国家自然科学基金项目(12072302); 国家杰出青年科学基金项目(52125806);
福建省住建厅科学技术计划项目(2022-K-264); 厦门市建设科技计划项目(XJK2023-1-2)
作者简介:张鹏程(1972-),男,工学博士,副教授,E-mail:zpcchina@xmu.edu.cn。
Author resume: ZHANG Pengcheng(1972-), male, PhD, associate professor, E-mail: zpcchina@xmu.edu.cn.

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更新日期/Last Update: 2025-06-01