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坝上拦栅架为坝式水电站进水口的重要组成结构。它一般为空间刚架与清污平台楼板的组合结构型式,其典型型式如安康水电站拦污栅刚架,图10为其结构模型照片。 过去设计拦污栅空间刚架时,共静力计算一般简化为平面刚架,而在地震作用下的动力计算则未曾仔细考虑过。近几年来有些水电站发生拦污栅刚架构件破坏现象,严重地影响发电与安全。为此,今后设计拦污栅刚架时,除静荷载组合需要采用空间刚架有限元电算求得较为准确的内力值外,对重要工程还要考虑地震荷载组合工况,亦即应进行地震动力计算,以期得到安全、经济和合理的拦污栅刚架结构型式、尺寸和断面配筋。本专题即为坝上拦污栅刚架提供抗震设计的简文算法和典型结构的地震动力计算参考数据。
Bashang bar rack for the dam-type hydropower station inlet structure of the important components. It is generally a combination of space rigid frame and decontamination platform floor structure type, its typical type such as Ankang Hydropower Station trash rack rigid frame, Figure 10 is a photo of its structural model. In the past when trash rack space frame was designed, the common static calculation was simplified as a plane rigid frame, and the dynamic calculation under the earthquake was not carefully considered. In recent years, some hydropower station trash rack member damage occurs, seriously affecting the power generation and safety. Therefore, in the design of trash rack frame in the future, in addition to static load combinations require the use of space rigid frame finite element computer to calculate the more accurate internal force value, the important project should also consider the combination of seismic load conditions, which should be carried out Earthquake power calculation, with a view to obtain a safe, economical and reasonable trash rack structure type, size and section reinforcement. This topic is to provide a simple anti-seismic design for dam trash racks and reference data for typical structural seismic power calculations.