發(fā)布時(shí)間：2018-09-01 17:58

【摘要】：鋼梁-鋼筋混凝土柱(RCS)組合結(jié)構(gòu)的應(yīng)用促進(jìn)了世界各國對(duì)其力學(xué)性能的深入研究,特別是對(duì)RCS組合節(jié)點(diǎn)的研究。作為各構(gòu)件的連接部位,節(jié)點(diǎn)的承載能力直接影響著結(jié)構(gòu)的可靠性,因此設(shè)計(jì)有足夠強(qiáng)度的節(jié)點(diǎn)至關(guān)重要。鑒于RCS梁柱節(jié)點(diǎn)構(gòu)造方式多樣,受力復(fù)雜,采用試驗(yàn)研究耗時(shí)費(fèi)力,數(shù)值分析方法因具有適用性強(qiáng)、成本低、分析便捷等優(yōu)勢獲得廣泛的應(yīng)用。本文采用有限元軟件ANSYS研究不同構(gòu)造對(duì)節(jié)點(diǎn)性能的影響,完成的主要工作及相關(guān)結(jié)論如下:(1)對(duì)RCS組合節(jié)點(diǎn)的國內(nèi)外研究和應(yīng)用現(xiàn)狀進(jìn)行了簡要綜述。(2)采用ANSYS對(duì)2個(gè)典型試件的節(jié)點(diǎn)承載性能進(jìn)行了研究,仿真結(jié)果與已有試驗(yàn)數(shù)據(jù)吻合較好。(3)在上述工作基礎(chǔ)上另設(shè)計(jì)了11個(gè)構(gòu)造不同的梁貫通式節(jié)點(diǎn)試件,探討了面承板寬度、梁柱截面高寬比、混凝土抗壓強(qiáng)度、面承板切口以及附加嵌入式面承板等因素對(duì)節(jié)點(diǎn)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(diǎn)抗剪承載性能。對(duì)采用切口面承板的節(jié)點(diǎn),當(dāng)面承板半高度滿足dp≥0.45dw(dw為鋼梁腹板高度)時(shí),切口的存在不會(huì)顯著影響節(jié)點(diǎn)的承載能力。在節(jié)點(diǎn)核心區(qū)中心位置嵌入一塊面承板可直接加強(qiáng)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(diǎn)承載性能。(4)通過有限元模擬獲取的梁端荷載值進(jìn)一步計(jì)算得出了試件節(jié)點(diǎn)的承載力,并將該結(jié)果與理論解進(jìn)行了比較,對(duì)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(hào)：2217934