王村中承式特大桥钢管拱肋施工工艺

王村公路大桥是一座中承式特大桥，此类大桥施工的关键在于钢管拱肋的制作安装、管内混凝土浇注和钢管的防腐处理。施工质量的好坏直接影响到桥梁的使用安全和使用寿命。     

浅谈钢管混凝土拱桥侧倾稳定性影响的因素

首先介绍了钢管混凝土拱桥稳定性分析中常用的基本理论,然后根据所收集到的有关钢管混凝土拱桥侧倾稳定性的资料,介绍了其中比较重要的影响因素.其中包括横撑,拱肋,边界处理等对钢管混凝土拱桥稳定性的影响.     

公路大桥钢管拱钢纤维混凝土试验及应用

公路大桥钢管拱钢纤维混凝土压注施工是全桥压注混凝土的关键部分,通过合理设计SFRC的配合比,并进行一系列试验,保证钢管拱钢纤维混凝土一次性压注成功。     

公路大桥钢管拱钢纤维混凝土试验及应用

公路大桥钢管拱钢纤维混凝土压注施工是全桥压注混凝土的关键部分,通过合理设计SFRC的配合比,并进行一系列试验,保证钢管拱钢纤维混凝土一次性压注成功.     

无风撑背靠式钢管混凝土拱桥施工技术探究

结合韩江北桥的设计和施工,对无风撑背靠式钢管混凝土拱桥进行了简单阐述,分析了无风撑拱桥的施工控制、设计方法等重要内容,这对拱桥的有效建设具有借鉴意义,同时对钢管拱桥设计和施工的完善具有重要作用。     

倮裹钢管混凝土拱桥施工控制

结合钢管混凝土拱桥施工控制的实例，探讨钢管混凝土拱桥施工控制的主要内容与控制方法，对监控结果进行分析，并对施工中需注意的事项提出几点建议。     

倮裹钢管混凝土拱桥施工控制

结合钢管混凝土拱桥施工控制的实例,探讨钢管混凝土拱桥施工控制的主要内容与控制方法,对监控结果进行分析,并对施工中需注意的事项提出几点建议。     

钢管混凝土拱桥拱肋加工质量控制

介绍了钢管混凝土拱桥拱肋加工质量的控制措施。     

钢管混凝土拱桥基于有限元的整体稳定性分析

从工程实例出发,对一座钢管混凝土拱桥建立了有限元模型,从线弹性和几何非线性两个方面进行了数值分析,分析表明该桥的屈曲稳定比较可靠,结构失稳模态均为拱肋面外失稳,表明拱肋的横向刚度相对系梁较弱.     

钢管混凝土提篮拱桥拱肋安装技术

结合安徽铜陵至汤口高速公路太平湖大桥拱肋吊装实例,介绍了该桥拱肋安装技术和拱肋安装过程中测控的内容。采用拱肋安装过程中线形测控、复核调整技术,优化拱轴线线形,确保钢管混凝土拱桥受力最合理。     

Design and research of gymnasium structure in Zhejiang University

INTRODUCTION The gymnasium project located in the newcampus of Zhejiang University is a symbol building(Fig.1). The requirements on the functions and theesthetics make it distinguished from a traditionalgymnasium. It is a two-story building with the firstfloor used for field competition and the second floorfor students’ basketball training. The heavy live loadsacting on the second floor and the requirement of 35m unobstructed space challenge the creativity of thestructural enginee…     

Blast protection shelter by using hollow steel filled with recycled concrete

Under extreme loading condition,a shelter will provide a safe place to protect people from injury caused by blast wave and fragments.In order to save resource and reuse waste materi-als,a new design concept for blast protection shelter was explored.The new construction was composed of I-section steel panel or C-channel steel panel filled with recycled concrete aggregate.The compaction process of the recycled concrete aggregate filled in the steel construction was ex-perimentally investigated.A single storey shelter based on the proposed design concept was nu-merically simulated by using LS-DYNA software.In the 3D numerical model,three walls were de-signed using I-section steel and one wall using C-channel steel,and all of the four walls were filled with recycled concrete aggregate.The penetration analysis was done by using ConWep.Some penetration tests were also carried out by using a gas gun.It is found that the proposed shelter based on the design concept is effective for blast protection.     

Approach for analyzing the ultimate strength of concrete filled steel tubular arch bridges with stiffening girder

A convenient approach is proposed for analyzing the ultimate load carrying capacity of concrete filled steel tubular (CFST) arch bridge with stiffening girders. A fiber model beam element is specially used to simulate the stiffening girder and CFST arch rib. The geometric nonlinearity, material nonlinearity, influence of the construction process and the contribution of prestressing reinforcement are all taken into consideration. The accuracy of this method is validated by comparing its results with experimental results. Finally, the ultimate strength of an abnormal CFST arch bridge with stiffening girders is investigated and the effect of construction method is discussed. It is concluded that the construction process has little effect on the ultimate strength of the bridge.     

Optimum design of large span concrete filled steel tubular arch bridge based on static,stability and modal analysis

A three-dimensional finite element model was established for a large span concrete filled steel tubular (CFST) arch bridge which is currently under construction. The arch rib, the spandrel columns, the prestressed concrete box-beam, the cast-in-situ concrete plate of bridge deck, the steel box-beam and the crossbeams connecting the two pieces of arch ribs, were modeled by three-dimensional Timoshenko beam elements (3DTBE). The suspenders were modeled by three-dimensional cable elements (3DCE). Both geometric nonlinearity and prestress effect could be included in each kind of element. At the same time a second finite element model with the same geometric and material properties excepted for the sectional dimension of arch rib was set up. Static dynamic analyses were performed to determine the corresponding characteristics of the structure. The results showed that the arch rib's axial rigidity could be determined by static analysis. The stability and vibration of this system could be separated into in-plane modes, out-of-plane modes and coupled modes. The in-plane stability and dynamic characteristics are determined by the arch rib's vertical stiffness and that of out-of-plane is determined by the crossbeams' stiffness and arch rib's lateral stiffness mainly. The in-plane stiffness is much greater than that of out-of-plane for this kind of bridge . The effect of geometric nonlinearity and prestress effect on bridge behavior is insignificant.     

大跨钢管混凝土桁架拱桥的地震反应分析

以巫峡长江大桥为研究背景,通过建立空间结构有限元模型,计算和分析该大桥的动力特性,并运用时程分析法分析该桥的地震反应,采用EI-centro波进行计算,讨论横桥向和竖桥向地震动对地震反应的影响和规律,为大跨度钢管混凝土拱桥的抗震设计和研究提供了理论依据。     

钢-混凝土组合结构的抗火设计

综合国内外有关钢结构和钢-混凝土组合结构抗火研究的部分试验结果和理论研究成果，总结了钢-混凝土组合结构抗火设计的方法，并与普通钢结构抗火设计进行比较，提出了一些钢-混凝土组合结构抗火设计的建议。     

钢管混凝土组拼管拱面外屈曲参数分析

以福鼎山前大桥空间有限元模型为基础,分析了影响钢管混凝土组拼管拱面外屈曲的主要参数,包括横撑布置形式、横撑刚度、拱脚约束情况、截面含钢率和混凝土弹性模量.有限元分析结果表明,横撑布置形式、横撑刚度和截面含钢率对钢管混凝土组拼管拱面外屈曲影响很大,但混凝土强度等级和拱脚约束对其影响很小.     

非预应力大跨度混凝土空心现浇楼板设计

大跨度结构应用范围越来越广泛,而且随着建筑技术的发展和建筑材料的更新,实现大跨度的手段也越来越多。除了预应力、钢结构、网架等通常结构以外,探讨一种普通材质为主的现浇空心板结构。结合实例,具体阐述计算及构造要点。     

瑞安市部分混凝土结构腐蚀破坏状况调查与原因分析

对瑞安市教座典型的混凝土结构构筑物的腐蚀破坏状况进行了调查分析．结果表明,飞云江沿岸混凝土结构腐蚀比较严重,许多构筑物的混凝土保护层过薄,有的出现了内部钢筋锈蚀、混凝土顺筋开裂和剥落等现象．主要原因有结构设计不合理、施工质量差、化学侵蚀等．