| 1. | This essay analyzes what causes the crack and calculates according to the elastic ground frame work
摘要对裂缝的原因进行分析并按弹性地基框架进行计算。 |
| 2. | To the crib groundsill , used the method of neglect the torsion effect and take it as a vane grillage foundation . then , divide the crib groundsill to vertical and horizontal beams , which are based on elastic ground
对框架型地梁按不考虑扭矩条件下的变形协调十字交叉梁法进行受力分配，拆解为单根地梁，按单梁方法进行计算。 |
| 3. | We consider each sleeper as an abutment of opposite forces , rails on horizontal sleepers as a mock dispersed elastic ground beam model and trains as moving load on beams . geometric roughness and damping are not taken into consideration
将每根枕木考虑成一个支座反力，将横向枕木支承的钢轨模拟成离散的弹性地基梁模型，将列车考虑成一个作用在梁上的移动荷载。 |
| 4. | Contrast with the results , the dissertation concludes that the axial loads of column have no essential variation , the variations of moments and shear forces of column are small under horizontal loads in contrast with the structure system in elastic ground , the moments and shear forces variation of column cannot be neglected , and the structure system with different foundation have the close degree variation
通过对比分析，本文认为水平力作用下交错桁架体系柱的轴力基本不变，弯距及剪力响应数值变化不大。竖直荷载作用下，与弹性地基计算结果比较，弯矩及剪力均存在不可忽略的变化，且不同形式基础其影响的程度基本相近。 |
| 5. | 3 ) the single pile horizontal dynamic impedance function in visco - elastic ground considering axial loads is first derived in this field , and the parameter analysis shows that the variation of single pile horizontal dynamic impedance cannot be neglected when considering the axial loads , and it ' s appropriate to considering the axial loads when calculate the single pile horizontal dynamic impedance
3 )首次推导了粘弹性地基中考虑桩头轴向力时单桩的水平动力阻抗函数，通过参数分析发现，轴向力对单桩动力阻抗刚度存在不可忽略的影响，当轴力较大时，计算单桩的动力阻抗以考虑轴力为宜。 |
| 6. | The results are important for dam base excavation and engineering disposal . ( 2 ) arch dam can be regarded as an elastic ground cantilever system composed of vertical cantilever , horizontal arch , and torsion structures . the dissertation takes the arch dam as load diversion system of arch - cantilevers system located on the ground composed of elastic cantilever
( 2 )将拱坝虚拟为由座落在坝基块体有限元上的一系列悬臂梁与水平拱组成，将悬臂梁视作由水平拱所支承的弹性地基梁，考虑径向和切向调整，比以往的弹性地基梁只考虑径向调整有所发展；而且用块体元模拟坝基，也能较精确地模拟坝基多种断裂构造等对坝体结构行为的影响。 |
| 7. | Some conclusions of sshsti and foundation model are derived in the research . the main researches are outlined as the following : 1 ) the three dimensions fem is used to investigate the displacement and forces of staggered truss with different foundation in elastic ground under horizontal and vertical loads
通过研究，本文得出交错桁架结构体系与地基基础共同作用的一些规律性结论，主要完成如下工作： 1 )利用三维有限元计算弹性地基中不同类型的基础在水平力与竖向力作用下交错桁架体系的变形与内力。 |
