CAJ | 학술논문

针对火力发电厂机组容量的不断增加，钢桁架管柱空冷支架结构在高烈度区已很难满足结构性能要求的实际情况，提出了一种新的结构形式一空间钢桁架伞撑空冷支架结构，以此建立空间有限元模型分析结构的动力特性。在三条地震波输入下，分别计算结构的层位移、层间位移角及层剪力，对比双向水平地震动和多维地震动的计算结果，提出结构扭转作用比及考虑扭转地震动作用的调整系数。考虑到扭转地震动对结构的影响，建议对水平地震动计算得到的地震作用乘以增大系数。
침대화력발전엄궤조용량적불단증가，강항가관주공랭지가결구재고열도구이흔난만족결구성능요구적실제정황，제출료일충신적결구형식일공간강항가산탱공랭지가결구，이차건립공간유한원모형분석결구적동력특성。재삼조지진파수입하，분별계산결구적층위이、층간위이각급층전력，대비쌍향수평지진동화다유지진동적계산결과，제출결구뉴전작용비급고필뉴전지진동작용적조정계수。고필도뉴전지진동대결구적영향，건의대수평지진동계산득도적지진작용승이증대계수。
As the increasing of the unit capacity in a power plant, the steel-truss RC pipe-column air-cooling condenser structure system in a high seismic intensity zone could not match the request of structure capability, so a new structural system--the space steel-truss steel brace air-cooling condenser stucture system is brought up as a solution. Here taking the space steel-truss steel-brace air-cooling condenser structure system as a research objecct, a space finite element model is built to analyze its dynamic properties. Its layer displacement, inter layer displacement angle and layer shear are cal- culated under three seismic waves respectively, the calculation results of two-direction level seismic-wave with muhi-di- mensional seismic-wave are compared, then, the torsional earthquake effect ratio and adjusting coefficient are suggested. Considering the impact of torsional seismic-wave on the structure, it is recommended that the earthquake effect of two-direction level seismic-wave is multiplied by the earthquake amplification factor.