【摘要】：本文對(duì)鋼框架外伸端板連接節(jié)點(diǎn)的受力影響因素進(jìn)行分析，分析梁柱外伸端板連接節(jié)點(diǎn)的各組件幾何尺寸改變時(shí)，對(duì)該節(jié)點(diǎn)的初始轉(zhuǎn)動(dòng)剛度、極限彎矩及極限轉(zhuǎn)角的影響。研究對(duì)象取自鋼框架在側(cè)向荷載作用下的典型梁柱連接單元。 采用大型有限元分析軟件ANSYS對(duì)鋼框架外伸端板連接節(jié)點(diǎn)進(jìn)行分析，首先建立一個(gè)base模型作為比較對(duì)象，然后考慮當(dāng)外伸端板連接節(jié)點(diǎn)的端板厚度、螺栓直徑、螺栓排距及梁截面高度發(fā)生改變時(shí)，與base模型相比其他節(jié)點(diǎn)模型的初始轉(zhuǎn)動(dòng)剛度、極限彎矩及極限轉(zhuǎn)角的改變量。 得出相關(guān)結(jié)論如下：當(dāng)端板厚度≤16mm時(shí)，增大端板厚度對(duì)半剛性節(jié)點(diǎn)的極限彎矩承載力和轉(zhuǎn)動(dòng)剛度的提高比較顯著，當(dāng)端板厚度為20mm時(shí)，提高端板厚度則對(duì)半剛性節(jié)點(diǎn)極限彎矩承載力和轉(zhuǎn)動(dòng)剛度的提高不太顯著。 螺栓直徑較小幅度的增大對(duì)提高半剛性節(jié)點(diǎn)的極限彎矩承載力、轉(zhuǎn)動(dòng)剛度、極限轉(zhuǎn)角不是明顯；只有增大的幅度較大時(shí)，即從20mm增大到24mm時(shí)，，半剛性節(jié)點(diǎn)的極限彎矩承載力、轉(zhuǎn)動(dòng)剛度、極限轉(zhuǎn)角的提高才比較顯著。 螺栓間距由110mm減小到90mm時(shí)，半剛性節(jié)點(diǎn)A5極限彎矩承載力與Base相比提高6%，轉(zhuǎn)動(dòng)剛度提高11%，極限轉(zhuǎn)角提高11%；當(dāng)螺栓直徑由110增大到130mm時(shí)，半剛性節(jié)點(diǎn)A6的極限彎矩承載力與Base相比降低6%，轉(zhuǎn)動(dòng)剛度降低14%，極限轉(zhuǎn)角降低19%；減小螺栓間距對(duì)提高半剛性節(jié)點(diǎn)的轉(zhuǎn)動(dòng)剛度和極限轉(zhuǎn)角的提高明顯。 增大梁截面高度雖然可以大幅度提高半剛性節(jié)點(diǎn)的轉(zhuǎn)動(dòng)剛度和極限彎矩承載力，但是卻降低了節(jié)點(diǎn)的延性，因此在實(shí)際工程中并不能一味增加梁截面高來(lái)提高半剛性節(jié)點(diǎn)的極限彎矩承載力和轉(zhuǎn)動(dòng)剛度，應(yīng)該兼顧節(jié)點(diǎn)的延性。
[Abstract]:In this paper, the influence factors of steel frame extension end-plate connection joints are analyzed, and the effects of the geometric dimensions of Liang Zhu end plate joints on the initial rotational stiffness, ultimate bending moment and ultimate rotation angle of the joints are analyzed. The research object is taken from typical Liang Zhu connection element of steel frame under lateral load. In this paper, a large finite element analysis software ANSYS is used to analyze the end plate connections of steel frames. A base model is established as a comparison object, and then the thickness of the end plates and the diameter of bolts are considered. When bolt spacing and beam cross section height change, the initial rotation stiffness, ultimate moment and ultimate rotation angle of other joint models are changed compared with base model. The conclusions are as follows: when the thickness of end plate is 鈮

本文編號(hào)：2283769