查询词典 pointed arch

Arch bridge ; arch rib sloping angle ; dynamic performance ; finite element method

拱桥；拱肋倾角；动力性能；有限元法

Backgrounded by the main bridge of Zhanhe River Bridge at Chengdonghe Road,Pingdingshan City,the software MIDAS/Civil is used to establish a 3-dimensional finite element calculation model for the double X-shape arch bridge and the effect of arch rib sloping angle changes on the dynamic performance of the type of the bridge is studied respectively for six design alternatives.

以平顶山市城东河路湛河桥主桥为工程背景，采用有限元软件MIDAS/Civil建立该桥的空间有限元计算模型，分6种设计方案研究了拱肋倾角变化对斜靠式拱桥动力性能的影响。

Based on detailed description of those phenomena,obvious regularities are concluded and described as follows: fracture in top arch of underground station and voltage transformation station downstream sidewall; buckling in top arch of bus bar line cavern and penstock downstream plat part.

通过分析破坏现象，总结了破坏现象的规律性：主厂房及主变室破坏现象主要集中在下游边墙顶拱，破坏方式以岩体开裂为主；母线洞及压力管道下平段破坏现象主要集中在顶拱外侧，破坏方式以弯折破坏为主。

Elastic buckling and inelastic buckling of arch with and without out-of-plane brace under full span distributed load and concentrated load are investigated The effects of the brace to the out-of-plane buckling load of arch are studied.

对拱结构在全跨均布荷载和跨中集中荷载作用下的平面外屈曲性能进行了研究，其中考虑了屈曲前变形路径的影响和面外支撑情况，为工程设计提供了有参考价值的建议。

Under the action of horizontal earthquake forces, buildings with brick arch roof and floors vibrates as a whole, and at the same time local vibration takes place in the arch.

本文对砖拱楼盖的计算，考虑了楼盖的局部振动及房屋的整体振动两种影响，以及不同楼层处砖拱楼盖的不同地震反应。

It was built in the eastern side of the castle to cliff-based, base five-storey block Oplegnathus, Article 55 stone on the base linefang zhuan , brick arch, the doors wide Bachimen, highyi zhang si chi , below the arch, beautiful shape, without any modification, it is Lichtung concise, simple and generous.

它建于城堡东侧，以山崖为基，基座上砌条石五层，条石上垒方砖五十五行，砌成拱形，门阔八尺，高一丈四尺，上拱下方，造型美观，无任何修饰，显得简洁疏朗，朴实大方。

On this model basis the first step method is used for optimization of the arch axis coefficient of the arch bridge.

在此模型基础上，使用一阶方法对拱桥的拱轴系数进行优化。

On the basis of the exact stress and strain analysis of the arch dam and foundation system, it is possible to optimize the shape of arch dam in order to meet the demand of safety and economy in engineering design.

在对拱坝-地基系统进行准确的应力应变分析的基础上，可以优化拱坝体型，使工程设计达到安全、经济的要求。

This paper introduces the global stiffness,strength and stability of bracing structure with long span,pointing out that the control of bracing structure's deflection and elastic module can make the arch ring fit the line of pressure and arch axis and can guarantee the stability of bridge structure.

本文介绍了大跨度支撑结构的整体刚度、强度和稳定性，控制支撑的挠度和弹性变量可使拱圈符合设计压力线与拱轴线，保证桥梁结构的稳定性。

The arch ring is constructed by hang-basket, and the cables are pulled to control the line shape of the naked arch at the same time.

大跨度拱桥施工可以采用的一种方法是悬臂浇注，它采用挂篮施工，并张拉扣索对裸拱线形控制。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。