论文部分内容阅读
姜永清同志在“离壁结构的设计和计算”一文中,对离壁结构的计算简图和内力分析做了详述,井指出离壁结构固有的优越性和适用条件。该文说理充分,观点明确;但对其荷载问题略作提契,笔者拟提出以下补充意见,仅供商榷。目前,离壁式结构的理论发展远落后于工程实践。考其原因,乃落石荷载的计算尚未获得解决,即落石的大小尚无法精确估计。在已知落石的情况下,又未能对结构在撞击条件下作动载分析,正如姜文指出的:“在设计荷载的选取上,普遍偏于保守”,“不仅造成经济上的浪费”,甚至出现谬误。(一)落石荷载的计算落石荷载与落石重量、落石高度、落石机率、落石与衬砌接触面的大
In his article entitled “Design and Calculation of the Structure of the Wall,” Comrade Jiang Yongqing elaborated the calculation diagram and the internal force analysis of the structure of the wall and pointed out the inherent advantages and applicable conditions of the structure of the wall. The article is full of arguments and clear-cut point of view. However, there is a slight concession on the issue of its load. The author proposes the following supplementary opinions for discussion. At present, the theoretical development of the wall structure lags far behind engineering practice. The reason for this is that the calculation of rockfall load has not yet been resolved, that is, the size of the rockfall can not be estimated accurately. In the case of known rockfall, it failed to make dynamic analysis of the structure under the impact conditions. As Jiang Wen pointed out, “the design load is generally conservative” and “not only causes economic waste” Even a fallacy. (A) Calculation of rockfall load Rockfall load and rockfall weight, rockfall height, rockfall probability, rockfall and lining contact surface