加拿大工程学论文代写：垂直力
加拿大工程学论文代写：垂直力
其中，c＝临界阻尼比，m＝模型质量，a =模型加速度
通过使用这些公式，人们发现垂直力在桥的跨度上是随机变化的。在这座桥上，拥挤的密度提供了2人/平方米，但据观察，平均为1.7人/平方米，开始困难的走过这座桥。它是假定这些故障对桥梁工程专业，但特别难吸收，事实上，这种现象已经不是只有这一次观察到的光是显著的（结构安全2000-01）。由此得出结论：横向同步励磁现象与技术创新无关。这种现象可以发生在任何地方的任何设计或桥梁，如果横向频率低于1.3赫兹装载足够数量的行人。这座桥的钢结构由于桥上意外的荷载或力而失败，尽管这座桥的估计和假设是现实的。因此，这种故障在自然界中是罕见的，只发生于意外因素，如千禧桥、行人在临界跨度时产生的意外力量。
必须将失败作为学习的机会，因此，在今后的项目中不可重复伦敦千禧桥结构中的关键漏洞。如前所述，收集的信息可以用来建造一座更好更坚固的桥梁。人群结构相互作用模型是识别新结构特别是悬索桥中任何漏洞的最好和最简单的方法。此外，还可以利用某些预防措施来避免此类问题。伦敦千禧桥的问题经过适当的解决后，91阻尼器的结构，可以有效地吸收垂直和横向振荡。从那以后，同样的事情也取得了成功，这一点从类似事件的不发生中就可以明显地看出。
加拿大工程学论文代写：垂直力
Where, c= critical damping ratio, M = model mass, A =model acceleration
By using these formulas, it was found that vertical forces vary randomly over the span of the bridge. In this bridge, the crowed density was provided 2 people / m2, but it was observed that on average of 1.7 people / m2, there started difficulty in walking over this bridge. It is assumed that these failures for the bridge are significant for the engineering professions but particularly difficult to assimilate in the light of the fact that this kind of phenomenon has not been observed for none other than this occasion (Structural Safety 2000-01). This is concluding that the phenomenon of lateral synchronous excitation is not linked to technical innovations. This kind of phenomenon can be occurred anywhere in future on any design or bridge if the lateral frequency is below 1.3 Hz loaded with sufficient number of pedestrians. This bridge steel structure failed because of the unexpected loading or forces on the bridge, though the estimation and assumption for this bridge were realistic. Therefore, such kind of failures are rare in nature and only occurs due to unexpected factors such as in case of Millennium bridge, the unexpected force exerted from pedestrians on critical spans.
The failures must be taken as an opportunity to learn, thus the key loopholes identified in the structure of London’s Millennium Bridge must not be repeated in the future projects. As stated earlier, the information gathered can be utilized to construct a better and stronger bridge. A crowd–structure interaction model is the best and easiest way to identify any kind of loopholes in the new structures, especially suspension bridges. Moreover, certain precautions can be utilized and incorporated to avoid such kind of problems. The problem of the London’s Millennium Bridge was adequately solved after the fitting of 91 dampers so that the structure can effectively absorb both the vertical and lateral oscillations. The same has been successful ever since, which is clearly evident from the non–occurrence of the similar issue.
