| 1. | The evolutional law of damage value as a function of stress was obtained
分别得出损伤变量随应力和应变而变化的演变规律。 |
| 2. | The critical damage value is not related to the nodularity , which is about 0 . 06 ~ 0 . 068 under the present test condition
临界损伤变量与球化率的关系不大，在文中试验条件下约为0 . 06 ~ 0 . 068 。 |
| 3. | Moreover the overestimated damage value increases along with the delayed time . the new method overcomes the old methods " shortcoming
新方法克服了这一缺点，使得评价多点输入地震破坏作用更加合理。 |
| 4. | The results showed that the damage in nodular cast iron happens when the applied stress is more than a certain extent , and the damage value increases with stress
研究结果表明，当应力大于一定程度时损伤发生，且随应力增加而逐渐增大。 |
| 5. | Subsequently , a constitutive including damage value for the frozen soil was set up , and the evolution equations for saturation and unsaturated frozen soil were given out based on the damage distinguish
建立了冻土单轴压缩的损伤型本构表达式，给出了冻土单轴压缩下的损伤演化方程，并进行了有效应力的计算。 |
| 6. | In order to describe the damaging value of structure under earthquake , the damage parameters based on elastic transformative energy is proposed , which is used to study the damage on section , component and the whole structure
为了定量描述结构在地震过程中不同时刻的损伤值大小，本文从结构耗能的角度出发，提出了基于弹性变形能的损伤指标，该损伤指标对研究截面、构件和整体结构三个层次上的损伤均适用。 |
| 7. | Whether the earth dam lapses in seismic response analysis is mainly judged by two criterion , the damage value and the permanent displacement , so the difference of response between multi - point input and one - point input , that is the multi - point effect , is also checked by this two criterion . therewith the method to calculate damage value and permanent displacement is studied too . the multi - point input is two directional , one direction is along river , and another is vertical
由于土石坝在地震作用下的失效形式包括累积损伤破坏和过大的永久位移，本文从累积损伤和永久位移两方面研究土石坝多点输入相对单点输入地震反应有何不同，即多点效应如何，因此与多点输入分析相关的损伤值和永久位移的计算方法也在研究之列。 |
| 8. | A more reasonable method to calculate soil ' s damage value is advanced , which bases on extrema of irregular dynamic shear stress . previously it bases on peaks of shear stress to calculate damage value , but by this method the destructive action of multi - point inputted earthquake is overestimated , especially in the second half section of responding shear stress " time history the shear stress caused mainly by differential force undulate slightly on one side of its zero line
以往计算土体在不规则的动剪应力作用下的损伤值根据的是动剪应力的峰值，在时域内多点输入分析中，由于差动力的的存在，使得时程后段动剪应力不穿零而在一侧做幅度不大的波动，基于峰值的损伤值计算特别过高地估计了这段剪应力的破坏作用，过高的程度还随延时增加而增加。 |
| 9. | The precious method to simulate earthquake accelerations is not perfect because the points on the interface still move according to the simulated acceleration when the points " motion ends , which is obviously a paradox . if the points " velocity is not zeroized , soil ' s damage value based on shear stress ' s peaks or extrema is overestimated in multi - point input analysis . the new method ' s rationality is analyzed
以往人工合成的地震波在地震结束时即地震加速度恒为零时速度不为零，这与合成地震动是“模拟输入点从静止到运动再到静止的运动过程”这一要求不一致，同时导致时域内多点输入分析时差动力过大以至算出的损伤值过大，于是本文提出了简易的地震动速度归零化方法并分析了其合理性。 |
| 10. | At last , take a three - storeyed and two - span reinforced concrete frame as example , its damage value under cyclic load at different time is computed by the program . and the damage evolution curve of different element and whole structure is also obtained . as result the damage evolution law of reinforced concrete structure under cyclic load is found , which provides basis for the study of collapsing mechanism of reinforced structure under seismic force
最后，以一个三层两跨的钢筋混凝土框架为例，应用作者自编的程序计算了循环荷载作用下该框架结构在不同时刻的损伤值，并给出了其不同构件及整体结构的损伤演化曲线，揭示了循环荷载作用下钢筋混凝土框架结构的损伤演化规律，为地震力作用下钢筋混凝土结构的倒塌机制问题的研究提供了依据。 |
