【摘要】：鋼梁-鋼筋混凝土柱(RCS)組合結(jié)構的應用促進了世界各國對其力學性能的深入研究,特別是對RCS組合節(jié)點的研究。作為各構件的連接部位,節(jié)點的承載能力直接影響著結(jié)構的可靠性,因此設計有足夠強度的節(jié)點至關重要。鑒于RCS梁柱節(jié)點構造方式多樣,受力復雜,采用試驗研究耗時費力,數(shù)值分析方法因具有適用性強、成本低、分析便捷等優(yōu)勢獲得廣泛的應用。本文采用有限元軟件ANSYS研究不同構造對節(jié)點性能的影響,完成的主要工作及相關結(jié)論如下:(1)對RCS組合節(jié)點的國內(nèi)外研究和應用現(xiàn)狀進行了簡要綜述。(2)采用ANSYS對2個典型試件的節(jié)點承載性能進行了研究,仿真結(jié)果與已有試驗數(shù)據(jù)吻合較好。(3)在上述工作基礎上另設計了11個構造不同的梁貫通式節(jié)點試件,探討了面承板寬度、梁柱截面高寬比、混凝土抗壓強度、面承板切口以及附加嵌入式面承板等因素對節(jié)點承載力的影響。結(jié)果表明:前三者的增大均能有效提高節(jié)點抗剪承載性能。對采用切口面承板的節(jié)點,當面承板半高度滿足dp≥0.45dw(dw為鋼梁腹板高度)時,切口的存在不會顯著影響節(jié)點的承載能力。在節(jié)點核心區(qū)中心位置嵌入一塊面承板可直接加強內(nèi)部混凝土斜壓桿作用。合理增大切口或嵌入面承板的寬度或減小其厚度均能有效提高節(jié)點承載性能。(4)通過有限元模擬獲取的梁端荷載值進一步計算得出了試件節(jié)點的承載力,并將該結(jié)果與理論解進行了比較,對比表明仿真解普遍高于理論值。
[Abstract]:The application of steel beam-reinforced concrete column (RCS) composite structure has promoted the deep research on its mechanical properties in the world, especially on the RCS composite joints. As the connection part of each component, the bearing capacity of the joint directly affects the reliability of the structure, so it is very important to design the joint with sufficient strength. In view of the diversity of RCS Liang Zhu node structure and the complexity of the force, it is time-consuming and laborious to adopt the experimental study, and the numerical analysis method has been widely used because of its advantages of strong applicability, low cost and convenient analysis. In this paper, the finite element software ANSYS is used to study the effect of different structures on the performance of joints. The main work and related conclusions are as follows: (1) the current research and application of RCS composite joints at home and abroad are briefly reviewed. (2) the load-bearing performance of two typical specimens is studied by ANSYS. The simulation results are in good agreement with the existing experimental data. (3) on the basis of the above work, another 11 specimens with different structures of beam through joint are designed, and the width of slab, the ratio of height to width of Liang Zhu section, the compressive strength of concrete are discussed. The influence of facet notch and additional embedded bearing board on the bearing capacity of joints. The results show that the increase of the first three can effectively improve the shear bearing capacity of the joints. For the joints with notched support plate, when the half-height of the support plate meets dp 鈮，

本文編號：2217934