负弯矩作用下腹板开洞组合梁抗剪性能试验研究

Experimental Study on Shear Behavior of Composite Beams with Web Opening Under Negative Moment

作者：廖文远(昆明理工大学土木工程学院)；周东华(昆明理工大学土木工程学院)；李龙起(昆明理工大学土木工程学院)；韩春秀(昆明理工大学土木工程学院)；姚凯程(昆明理工大学土木工程学院)

Author：Liao Wenyuan(College of Civil Eng.,Kunming Univ. of Sci. and Technol.)；Zhou Donghua(College of Civil Eng.,Kunming Univ. of Sci. and Technol.)；Li Longqi(College of Civil Eng.,Kunming Univ. of Sci. and Technol.)；Han Chunxiu(College of Civil Eng.,Kunming Univ. of Sci. and Technol.)；Yao Kaicheng(College of Civil Eng.,Kunming Univ. of Sci. and Technol.)

收稿日期：2014-02-18 年卷（期）页码：2014,46(4):46-52

期刊名称：工程科学与技术

Journal Name：Advanced Engineering Sciences

关键字：组合梁；腹板开洞；负弯矩作用；抗剪性能；试验研究

Key words：composite beam;web opening;negative moment;shear behavior;experimental study

基金项目：国家自然科学基金资助项目（51268022）；国家青年科学基金资助项目（51308269）

中文摘要

通过对集中荷载作用下的腹板开洞钢-混凝土组合梁进行试验，研究在负弯矩作用下腹板开洞组合梁的抗剪力学性能。试验结果表明：负弯矩作用下的组合梁腹板开洞后，其刚度和承载力降低很大，洞口区域截面不再符合平截面假定；破坏形式为洞口区混凝土板的剪切破坏，同时洞口区的部分栓钉连接件出现了拔脱现象；另外，通过增加混凝土翼板厚度可以提高负弯矩区腹板开洞组合梁的承载力，增加纵向钢筋配筋率可以提高其变形能力。研究为负弯矩区腹板开洞组合梁的有限元分析和实际应用提供了试验数据。

英文摘要

In order to investigate the shear behavior of composite beam with web opening under negative moment,simply supported composite beam under concentrated load were tested.The test results showed that the stiffness and ultimate capacity decreases significantly after web opening and the plane hypothesis is not satisfied any more.The failure mode is shear fracture in concrete slab near the opening area,and some stud connectors in opening area are pulled off.The ultimate load bearing capacity and deformation capacity can be effectively enhanced by increasing the thickness and reinforcement ratio of a concrete slab.This research provides an experimental basis for the EFA and the application of composite beams with web openings under negative moment.

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论文摘要

负弯矩作用下腹板开洞组合梁抗剪性能试验研究

Experimental Study on Shear Behavior of Composite Beams with Web Opening Under Negative Moment