CAJ | 학술논문

将弧形闸门主框架简化为有限侧移的弱支撑门式框架，为反映其实际屈曲模态，根据结构稳定理论，推导出了同时考虑柱端转动刚度和侧向支撑刚度单根轴心受压的柱端约束常数关系式，利用该关系式给出不同梁柱线刚度比、不同侧向支撑刚度情况下，弧形闸门主框架屈曲方程。通过试算给出相应的计算长度系数精确解，并给出了较高精度的实用计算公式。侧向支撑刚度Kb大于10对提高框架稳定的作用不再明显，认为强支撑和弱支撑的分界点为Kb ＝10；自由侧移和完全无侧移框架柱的计算长度系数差别极大，因此，侧向支撑刚度Kb对弧形闸门主框架柱的计算长度系数或屈曲荷载影响显著，在确定框架柱屈曲荷载之前首先要判明侧向支撑的强弱情况。
장호형갑문주광가간화위유한측이적약지탱문식광가，위반영기실제굴곡모태，근거결구은정이론，추도출료동시고필주단전동강도화측향지탱강도단근축심수압적주단약속상수관계식，이용해관계식급출불동량주선강도비、불동측향지탱강도정황하，호형갑문주광가굴곡방정。통과시산급출상응적계산장도계수정학해，병급출료교고정도적실용계산공식。측향지탱강도Kb대우10대제고광가은정적작용불재명현，인위강지탱화약지탱적분계점위Kb ＝10；자유측이화완전무측이광가주적계산장도계수차별겁대，인차，측향지탱강도Kb대호형갑문주광가주적계산장도계수혹굴곡하재영향현저，재학정광가주굴곡하재지전수선요판명측향지탱적강약정황。
The main frame of the radial gate could be simplified to weakly braced gate-type frame with limited lateral displacement. In order to re-flect the actual buckling mode,according to the theory of structural stability,the expression of constraint constant considering rotational stiffness and lateral stiffness,was deduced by equilibrium equation of the concentrically loaded columns with the end restricted. Then the buckling equation of radial-gate frame at different crossbeam linear stiffness and lateral stiffness could be deduced,and the exact solution of the effective length factor was given by trial calculation. An example showed that the practical formula was of high precision and generally applicable. When lateral supporting stiffness Kb was greater than 10,the framework stability was no longer improving obviously that the divide point of strong support and the weak sup-port was taken as 10;Effective length factors were greatly large between freedom and rigid support frame,thus the lateral support stiffness Kb signif-icantly affect the buckling load,we must first ascertain the strength of lateral support before determining the frame stability.