Experimental study on tubular arches under unsymmetrical two concentrically in-plane loads;
管拱面内两点非对称加载试验研究
Test of steel tubular model arch under non-symmetric in-plane loads;
钢管拱面内非对称加载试验
Experimental study on steel tubular arch under symmetric in-plane loads;
钢管拱面内对称加载试验
The contradiction can be resolved by the establishment of coal pillar at working face and stage coal pillar.
为了解决这一矛盾,可通过留设面内煤柱和区段间煤柱的方法给予解决。
In this paper it is again discussed that the influence of extension or contraction deformation of honeycomb wallboard on in-plane stiffness.
反映蜂窝材料等效弹性参数的Gibson公式结果简单，便于应用然而由于对应于蜂窝壁板伸缩变形的刚度被忽略，导致蜂窝夹层结构数值分析时，芯层材料的弹性矩阵表现出不确定性本文重新考虑了蜂窝壁板的伸缩变形对面内刚度的影响，对Gibson公式进行了修正本本文结果不但克服了Gibson公式的缺陷，同时提出了考虑蜂窝芯层面内刚度的一种简化方案,该方案可以方便地应用于蜂窝夹层结构的计算。