After simulation test and study on the construction of long span stone arch bridge, it is understanded that the combined effect between arch ring and arch center formed in advance is clear and the stress of arch ring is closely related to the process of construction.

Because the main arch and the center line of the bridge in the horizontal projection is misaligned, the deformation and stress distribution of the bridge are very complex.

主拱肋轴线水平面内的投影与桥梁中心线的不重合，全桥的变形和受力情况都很复杂。

Design and Analysis of Oval Arch Center with Two Joints for Plastic Tent

塑料大棚两铰椭圆拱架设计与分析

In recent years, the growth period was prolonged and production was increased by planting in the small arch shed covering with plastic film.

近年来，利用塑料薄膜进行生姜小拱棚覆盖提早保护栽培，延长生姜生育期，可显著提高生姜产量。

A 500-year-old arch door on the Great Wall has been reduced to ruins in north China's Shanxi Province after a strong gale hit last week.

上周，一场罕见大风导致中国北方山西省的长城一座拱门倒塌成为废墟，该拱门已有500年历史。

We walked under the big gingko trees, just like we were walking under a tree arch door.

我们走在大树下，好象走在树搭建成的拱门下。

RC-masonry combination arch bridge abandons the disadvantages of conventional masonry arch bridge's falsework type construction, which makes longer construction time, higher cost and against protecting environment.

RC-石砌体组合拱桥摒弃了传统石砌拱桥采用有支架施工造成的工期长，造价高，不利于环境保护的缺点；

The arch belly gravity dam is a new type of dam. Its upstream face is inclined and it has a belly arch within.

腹拱式重力坝是一种新坝型，坝上游面倾斜，坝内设有腹拱。

Rupture test studies of the arch belly gravity dam under overloading

腹拱重力坝超载破坏试验研究

Results Zygomatic arch was an anatomical key for medial skull base and infratemporal fossa exposure. The length of the zygomatic arch and the width of the mandibular fossa were 32.9 ± 2.6 mm and 15.5 ± 1.3 mm respectively.

结果颧弓是暴露中颅底和颞下窝的关键，颧弓长度和下颌关节窝宽度分别为32.9±2.6mm和15.5±1.3mm；

For high arch dams, the key problems include monolithic stability evaluation, cracking evaluation of dam-heel, reinforcement design of dam-toe and faults of dam foundation, and the value of mechanics parameter of rock mass.

高拱坝结构整体稳定性评价、高拱坝坝踵开裂稳定评价、高拱坝坝趾加固设计、高拱坝基础断层的加固处理及岩体力学参数取值问题为高拱坝设计中的关键问题。

Carotid sinus and aortic arch baroreflex plays the key role in buffering the fluctuation of blood pressure and keeping blood pressure homeostasis.

颈动脉窦、主动脉弓压力感受器反射是缓冲血压变化，维持机体血压稳态的重要调节机制。

Rese arch On The Key Technologies' Countermeasures In the Design of Combined Bridges With Prestressed Continuous Beam and Arch

连续梁拱组合桥梁设计关键技术对策研究

Conclusion: Relieving the tension of anastomosis, enlarging the outlet of thorax and the space posterior to aortic arch are key steps for preventing anastomotic fistula.

结论：降低吻合口张力，保证胸腔入口、主动脉弓后间隙宽畅是避免吻合口瘘发生的关键。

The structure of the middle load and concrete-filled steel tube ( CFST) "Fly-bird-type" arch bridges, with flexible tied bar, uses tie bar to balance the arch structure horizontal thrust.

飞燕式钢管混凝土拱桥为中承式柔性系杆拱结构，通过张拉柔性系杆来平衡拱结构的水平力。

Though in terms of structure system, rigid-framed tied arch bridge belongs to an arch bridge without thrust, and its load path is clear, the construction process is long and complex.

从结构体系上看，刚构系杆拱桥属于无推力结构，传力路径明确，但是，结构的形成过程较为复杂、漫长。

Otherwise, the stability of arch support is controlled by arch abutment thrust. This paper analyzes the influencing factor of arch abutment thrust fatherly, like the forms of slabs and.

而拱座的稳定性由拱端推力水平控制，本文在以往研究的基础上，进一步研究拱端推力的影响因素，比如板块的形式。

Kunshan Yufeng bridge& design of the first long-span leaning-type arch bridge without thrust

昆山玉峰大桥&首座大跨度无推力斜靠式拱桥的设计研究

Dynamical Characteristics of Arch Bridge Without Thrust and Analysis of the Train Running Safety

无推力式钢桁系杆拱桥动力特性及列车走行性分析

In order to simulate the construction processes and reveal the stress and deformation processes of the dam body and slope, the application of arch dam thrust is employed based on the states of excavation, unloading and reinforcement that have already been completed;

为更好地模拟施工过程，反映坡体和坝体的应力和变形过程，在边坡开挖、卸荷、加固工况计算已完成的基础上进行坝体推力施加的分析；

Increasing the arch thrust augments the shear stress on the surface of the shearing resistance part, which counteracts the influence of the crushed rock.

同时由于拱向应力的增大，即增大了抗剪面剪应力，抵消了坝体下游破碎岩石的影响。