| 1. | It also investigates the effect of secondary torque , the characteristics of moment redistribution subjected to reversed cyclic loading , and the role of spandrel beams in the overall response
着重讨论了预应力次扭矩对结构受力的影响、水平荷载作用下结构的弯扭分配规律以及如何进行边主梁的合理设计等问题。 |
| 2. | ( 5 ) for segmental bridge , creep will cause secondary force because of changing of the system . creep has slight influence on the distribution of internal force of rigid - frame , but has great influence on the spandrel beam
( 5 )对于采用分阶段节段施工的桥梁，由于存在体系变化，徐变不仅对结构的变形有影响，而且还将产生徐变次内力。 |
| 3. | The method for design thin - wall core box cast - in - site concrete hollow floor using common structural computing software is put forward and the scale for the magnifying stiffness coefficient of the spandrel beam and middle beam is discussed
5 、提出了采用常用的结构计算软件计算薄壁箱体现浇混凝土空心楼盖设计的方法,提出了边梁和中梁刚度放大系数的建议。 |
| 4. | Circular arch is rational for big rise - span ratio , but each has his strong point for small rise - span ratio . ( 3 ) the common used rise - span ratios are 1 / 6 - 1 / 12 . by the decrease of rise - span ratio , the internal forces are increasing linearly except of the moment of open spandrel beam
( 3 )空腹式刚架拱桥的矢跨比一般为1 6 1 12 ，随着矢跨比的减小，除了空腹段加劲梁的弯矩值线性减小外，其余截面的内力值均为线性增大。 |
| 5. | Compounding stiffness is introduced for analyzing the characteristics of moment redistribution in the long - span floor beams structure subjected to lateral loading . it is shown from the testing result that the specimen can be analyzed by elastic theory before cracking . the development of cracking in the spandrel beams and the floor beams ( including floor ) causing the compounding stiffness and the bending stiffness of floor beams through the column to change distinctly , correspondingly moment - torque redistribution occurs
由于过柱子次梁、边主梁的开裂以及梁上次梁（包括楼板）的开裂，使得过柱子次梁的抗弯刚度和边主梁梁上次梁板组合刚度发生了明显的变化，导致产生弯扭重分配，一般情况下，组合刚度与过柱子次梁抗弯刚度的比值增大，边主梁所受扭矩增加，反之，边主梁所受扭矩减小。 |
| 6. | At last , it discusses the method of designing the spandrel beams properly , including the reduction of spandrel - beam - torque and the flexural strength ratio between columns and beams . results from the tests show that the effect of secondary torque , especially the anti - symmetry , exists in the structure during the whole testing
试验结果表明，预应力次扭矩对结构受力的影响，存在于整个受力阶段，其对结构受力的反对称效应是比较明确的，尤其对边主梁的受扭影响。 |
| 7. | Based on the theoretical analyses and the results from tests , the changing law of secondary torque is similar with that of the torque of spandrel beams subjected to the vertical loading . it points out the fact that secondary torque is a compatibility torque . at the same time , it provides an applicable method , which conforms to the changing law of secondary torque
本文通过理论和试验数据分析，得到预应力次扭矩的变化规律与竖向荷载作用下的边主梁扭矩的变化类同，指出预应力次扭矩同样是一个典型的协调扭矩；同时对于预应力次扭矩在设计中如何考虑，本文提供了一种实用的并且符合预应力次扭矩变化规律的处理方法。 |
| 8. | The conclusions are list as follows : ( 1 ) the mechanical properties of different parts of the bridge are as follows : arch is under the combined action of compression and bend ; open spandrel beam is under the combined action of tension and bend ; close spandrel beam is under the combined action of compression ( or tension ) and bend , but the axis force is small
本文得出的结论如下： ( 1 )空腹式刚架拱桥的受力兼具梁和拱的特点。结构各部位的受力特性如下：斜腿为压弯作用；空腹段梁体为拉弯作用；中跨实腹段梁体为压弯作用或拉弯作用，但轴向力较小，受力更接近纯弯构件。 |
| 9. | From the point of the behavior of spandrel beam in the course of test , there are four clearly stages based on the three characteristic points : bending cracking of floor beams through the column , diagonal cracking of spandrel beams and / or bending cracking of floor beams above the spandrel beams ( including floor ) and bending yield of floor beams through the column . in the last stage , the torque of spandrel beams seems more like an equilibrium torque than a compatibility torque . the law of
从边主梁的受力看，以过柱子次梁的弯曲开裂、边主梁的扭剪开裂以及梁上次梁（包括楼板）的弯曲开裂和过柱子次梁的弯曲屈服为受力特征点划分为四个受力阶段，其中边主梁在过柱子次梁的弯曲屈服后的受扭则更多地具有平衡扭转的性质，而在这以前是协调扭转。 |
| 10. | Consideration of the additional axial , two angular deformations generated by the bond slipping in anchorage zones of joints , the assumption is made , that the plane section of either end of a member before bond slipping of reinforcements remains afler bond slipping of reinforcements . additional deformations * contribution to stif ? nesses of plastic sub - elements is formed from the boundary nonlinearity of plastic stabelements . the space bond slip relation can truly compute bond slip in anchorage zones , additional def ? rmatinns , and their contribution to the space nonlinearity of a niember , has used iii space nonlinear analysis of columns and spandrel beams in this dissertation
附加变形对塑性子区域的刚度贡献，看作是塑性子区域的边界非线性，建立了构件端部子区域基于构件边界非线性的钢筋与砼之间的空间粘结滑移关系，能较真实地求得锚固区的粘结滑移、附加变形以及他们对构件空间非线性性能的贡献，并运用于柱、裙梁的空间非线性分析之中。 |
