重力坝

The results show as follows: Autogenous volume deformation of MgO concrete is closely relative to mix proportions, high water content will accelerate hydration of MgO, thus increases expansion of concrete; the addition of fly ash will suppress the expansion of concrete.

内含氧化镁水泥混凝土自生体积变形与配合比参数有关，较大水胶比有利于氧化镁的较快水化，粉煤灰对混凝土变形有抑制作用，内含氧化镁水泥适用于强度等级较低的重力坝混凝土。

But the rigid body limit equilibrium method can not reflect the process of progressive instability and mechanical mechanism on failure for rock mass while the nonlinear finite element method is difficult to solve the displacement discontinuity of weak structural plane.

重力坝的深层抗滑稳定分析多采用刚体极限平衡分析方法和非线性有限元法，但通常的刚体极限平衡法不能反映坝基岩体渐近失稳过程和破坏的力学机制，非线性有限元法则难以解决坝基中软弱结构面位移不连续问题。

On the basis of a lot of data from test, this paper studies the correlativity between granulometric composition and shearing strength parameter in sedimentary rock area, and that correlation equations are established in different consistence states.

作者在大量试验成果基础上，研究了某电站重力坝坝址区层状岩体中软弱夹层粒度成分和抗剪强度参数之间的相关关系，并建立了各种稠度状态下的粒度成分和抗剪强度参数间的相关方程。

That shear strength parameter is accessed according to quantitative index of granulometric composition is put forward in concrete gravity dam design criterion. By criterion, strength parameter may be acquired easily, however influencing factor of interlayer strength parameter is not all things consider.

混凝土重力坝设计规范》（DL5108-1999）中提出的以粒度成分定量指标评价软弱结构面强度参数，可以较方便地得到夹层的强度参数，但它没有综合考虑影响夹层强度的多种因素。

In this paper, the 3-D finite element relocating mesh method is used to calculate the temperature field and the thermal creep stress field of spillway dam and mid level outlet dam in certain roller compacted concrete gravity dam, sensitivity analysis have been down with different parameters, such as placing temperature, the location of cooling pipe, cooling temperature, time for water supply, ascended-layer of concrete, intermissive time and different placing time, and the commendatory construction scheme have been put forward in such analysis; according by the test result on the two scheme of concrete aggregate combination (basalt as coarse aggregate and limestone as fine aggregate, basalt as coarse aggregate and basalt as fine aggregate), simulation analysis on temperature field and thermal creep stress field of the commendatory construction scheme have been down, and analysis have also been down on temperature field and thermal stress field of the two different aggregate combination, the result indicates that the spillway dam and mid level outlet dam which adopted these two aggregate combination can both satisfy the require of design crack resistance in concrete, furthermore limestone as fine is better than basalt as fine aggregate; the effect of summer water storage and winter water storage on the temperature field and thermal stress field have been analyzed, comparing with winter water storage, in summer water storage scheme the maximum tensile stress at abnormal concrete in upstream fill is decreased by 0.1～0.3MPa and there are no evidence change of the maximum tensile stress at other parts, which indicate that summer water storage is avail for the crack resistance of upstream fill; according to the simulation calculating result and comparing temperature simulation calculating results and temperature controlling measures of some similarity projects both completed and construction, synthesis appraise have been carried to the design temperature controlling measures of dam, and the temperature controlling measures of this project have been brought forward, all these have great reference value on the design of temperature controlling measures and the optimization of the construction scheme.

本文采用三维有限元浮动网格法仿真计算程序，对某碾压混凝土重力坝的溢流坝段和中孔坝段分别进行了三维有限元温度场和温度徐变应力仿真计算分析，对浇筑温度、冷却水管的布置方式、冷却水温、通水时间、浇筑升程和间歇时间、不同开始浇筑日期等参数进行了敏感性分析，在此基础上提出了推荐的施工方案；根据两种骨料方案(玄武岩粗骨料+灰岩细骨料方案；玄武岩粗骨料+玄武岩细骨料方案)的混凝土性能试验研究成果，对推荐的施工方案进行了温度场和温度徐变应力仿真计算，并对比分析了两种不同骨料情况下的温度场和温度应力，结果表明溢流坝段及中孔坝段采用上述两种骨料均能满足混凝土的抗裂设计要求，且灰岩细骨料优于玄武岩细骨料；计算分析了夏季蓄水和冬季蓄水对坝体温度场和温度应力的影响，夏季蓄水方案与冬季蓄水方案相比，坝体上游变态混凝土区域最大拉应力小0.1～0.3MPa，其他部位最大拉应力无明显变化，夏季蓄水对坝体上游面混凝土的抗裂有利；根据仿真计算成果并通过比较国内一些已建和在建的类似工程的温度仿真计算成果及采取的温控措施，对大坝的设计温控措施进行了综合评价，并提出了该工程的温控措施，对温控设计和优化施工方案具有重要参考价值。

Formulas are derived to compute hydrodynamic pressures or hydrodynamic perssure influence matrices on dams using series development and linear superposition theorem with nonvertical upstream face、the compressibitily of water、the effect of absorption of the reservoir bottom ect. being taken into account.

利用级数展开和线性叠加原理，推导了坝迎水面倾斜、库水具有可压缩性、库底具有吸收性等多种情形下，重力坝迎水面上动水压力和动水压力影响系数矩阵的计算公式。

In this paper, gravity dam is mainly analyzed static strength and sliding stability and seismal stability with Finite Elements Method and the theory of reaction spectrum analysis with Pro/Engineer and ANSYS.

本论文运用有限单元法和反应谱分析理论，结合大型有限元分析软件ANSYS和CAD设计软件Pro/Engineer对邢台市朱庄水库重力坝进行了静力强度分析、抗滑稳定性分析和抗震分析。

With the development of FEM theory and simulating software, FEM software's simulation to gravity dam has great engineering signality and practical value.

随着有限单元法的完善和仿真软件的不断发展，采用有限元软件对重力坝进行仿真模拟具有重要的工程意义和实用价值。

With the development of FEM theory and simulating software, FEM softwares simulation to gravity dam has great engineering signality and practical value.

随着有限单元法的完善和仿真软件的不断发展，采用有限元软件对重力坝进行仿真模拟具有重要的工程意义和实用价值。

With the development of FEM theory and simulating software, FEM softwares simulation to gravity dam has great engineering signality and practical value.

随着有限元理论的完善和仿真软件的不断发展，采用有限元软件对重力坝进行仿真模拟具有重要的工程意义和实用价值。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷