| 1. | Stability reduction coefficient of axially loaded compression
轴心受压构件稳定系数 |
| 2. | Over - all stability reduction coefficient of steel beam
钢梁整体稳定系数58 |
| 3. | Acoustical reduction coefficient
隔声系数 |
| 4. | The result shows that average absorption coefficient and noise reduction coefficient separately equal to 0 . 58 and 0 . 60 , and fine property of sound absorption at middle - low frequency
结果表明材料的平均吸声系数和降噪系数分别达0 . 58和0 . 60 ，且材料的中低频吸声性能优良。 |
| 5. | Analyzing the composite foundation bearing capacity reduction coefficient of soil among piles by data gathering from practice engineering ; providing some advice and a regional experimental extent of selecting the bearing capacity reduction coefficient of soil among piles for designing composite foundation with cfg piles in loess area according to investigating results , with which give the designer a material to consult
根据实际工程中采集的实验数据，对复合地基桩间土承载力折减系数进行了讨论分析，根据实验研究结果，给出了黄土地区的cfg桩复合地基设计中桩间土承载力折减系数的一个区域性的经验取值范围，并对cfg桩复合地基的设计提出了一些建议，可供工程设计人员参考。 |
| 6. | Based on the comprehensive statistical analysis of inelastic displacement ratios , the regression equations of - r - t about the strength reduction coefficient and inelastic displacement ratios are obtained . the effects of soil condition , earthquake magnitude , epicenter distance , damp ratios and hysteretic characteristics are considered in detail
通过对理想双线性体系的均值弹塑性位移比与强度折减系数进行了统计分析与数值拟合,建立了两大类场地土(硬土、软土)下的- r - t回归公式。 |
| 7. | On account of most of the existing research was limited in single pile and single pile with a cap . this paper has done six single pile , one single pile , one three piles composite foundation and two - origin foundation static load experiments and obtained the principal value . the author found the formula in the code is vaguely in deals with the origin foundation bearing capacity and its reduction coefficient . two pieces of advice were put forward to improve the formula and achieved satisfied results in fact engineer construction
水泥土桩复合地基研究的困难，在于其非均一性的特点，鉴于前人的研究工作多局限在单桩及单桩复合地基，本文进行了六组单桩，单桩与多桩复合地基、天然地基各两组的静载荷对比试验，得到了三者承载力的基本值，指出了有关规范复合地基承载力公式中的天然地基，取值不明确，不利于实际应用。 |
| 8. | The concept of the equivalent mode and the modal participation coefficient is introduced when the regulation structures are studied . as to the vertical irregular structural systems , the inter - story capacity spectrum method is used and the strength reduction coefficient 77 is put forward when the capacity method is used to evaluate the performance of the torsional irregular structures
对于扭转不规则结构体系，引入与结构偏心矩大小和结构平面整体尺寸有关的强度降低系数叮来考虑结构的扭转效应，选取结构的基底剪力和边轴线的最大反应位移为参数，应用能力谱方法进行抗震性能评估。 |
| 9. | The results showed that : ( 1 ) the models used by author and the analysis are useful and can be practiced . ( 2 ) after using isolation technology , the structure ' s period , earthquake response , base shear force and acceleration are all decreased markedly and the horizontal displacement focuses on isolation layer . ( 3 ) under frequent earthquake action , the shear force ratio between layers is close to 0 . 35 ; in according with the provision in aseismic design code that the horizontal seismic reduction coefficient can choose 0 . 53 and the upper building can be designed by decreasing one degree
计算模型分别采用三维空间模型及规范中建议的弹簧、质量模型，隔震层采用叠层橡胶隔震支座，运用大型结构有限元计算程序sap2000以及自主开发的nba结构程序计算隔震结构在多维地震动输入下的动力非线性时程反应，同时研究了隔震结构在温度变化的作用下，结构各杆件的内力变化，通过对变电建筑物在传统抗震作用下及隔震作用下的分析比较，得出一些有益的结论。 |
