Results 1 to 10 of about 799,334 (88)
Jianzhu Gangjiegou Jinzhan, 2020 为了在中小跨径桥梁中推广使用钢-混凝土组合结构桥梁,提高桥梁的工业化建造水平和组合梁桥的装配化程度,提出了一种整体预制钢-混凝土组合梁桥结构。结合常用的中小跨径的需求,考虑公路运输条件和吊装能力,构建了整体预制钢-混组合梁结构基本单元,并提出了单元之间的连接方式,进一步形成整体桥梁。计算分析表明:所提出的整体预制钢-混组合梁,在受力性能方面均优于传统分离预制钢-混组合梁,在全寿命周期的经济性能方面优于现有的预制混凝土箱梁、预制混凝土T形梁,在施工性能方面相比于现有的预制混凝土箱梁 ...
苏庆田 +4 more
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Constructing a porous scaffold with the essential features of natural cancellous bone, including structural architecture and biochemical cues, is one of the pivotal factors for effective bone regeneration. In this study, a biomimetic composite porous Gelatin fibrous scaffold (SrHA/Gelatin) incorporating ultralong strontium‐doped hydroxyapatite
Yin‐Chuan Wang +8 more
wiley +1 more source
Asian Politics &Policy, Volume 18, Issue 2, April 2026.ABSTRACT States vary their participation in multilateral institutions based on strategic objectives. This paper explores how emerging powers adopt different participation strategies in multilateral institutions, arguing that they selectively prioritize institutions where they can act as key coordinators to elevate their international status.
Ping‐Kuei Chen
wiley +1 more source
International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source
Uncovering Xi Jinping's Policy Agenda: Text As Data Approach
The Developing Economies, Volume 63, Issue 1, Page 9-46, March 2025.How many agendas has Xi Jinping put forth and promoted since taking office in 2012, and what are the types of agendas? How much of political attention has each agenda received, and how has the allocation of attention changed over time? We utilize a dataset of presidential statements, speeches, and reports from 2012 to 2022 and employed automated text ...
Jaehwan Lim, Asei Ito, Hongyong Zhang
wiley +1 more source
Jianzhu Gangjiegou Jinzhan相较于分块预制桥面板，横向全宽预应力预制桥面板的整体性更好，施工更快捷，因此在装配式组合梁桥中具有较好的应用前景。负弯矩作用下预制桥面板的湿接缝连接是受力的关键部位，因此对负弯矩作用下全宽预应力预制桥面板组合梁的力学性能进行研究，考察了横向预应力筋数量、预应力筋布置方式、剪力连接程度、接缝处材料对结构破坏模式、开裂荷载、抗弯承载力、荷载-位移曲线等力学特性的影响，揭示了预制板接缝处的应力分布规律；针对完全剪力连接的预制桥面板组合梁，提出了负弯矩作用下挠度计算的改进有效惯性矩叠加法 ...
陈娟 +4 more
doaj +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 为研究钢桁腹-混凝土组合箱梁的畸变效应，根据其结构特性和力学特性，考虑共同工作区对组合箱梁腹杆纵向刚度的贡献，提出一种更适用于该类组合箱梁的畸变扇性坐标分布模式。采用新畸变中心定义符合钢桁腹-混凝土组合箱梁畸变变形特征的畸变角，应用能量变分法建立畸变控制微分方程，并给出包含Krylov函数的初参数解。结合数值算例，分析钢桁腹-混凝土组合箱梁在均布畸变荷载作用下的畸变翘曲正应力，并通过有限元软件ANSYS验证所推导理论的正确性。通过改变腹杆壁厚、俯角等关键参数，探究其对畸变内力的影响规律。结果表明 ...
李永鹏, 丁南宏, 冀伟
doaj
, 2017 当今时代是一个飞速发展的社会，我国的各项社会主义事业日益进步，其中道路建设是尤为重要的一项基础设 施建设。因此，在市政道路桥梁设计时，关于其荷载的标准的判定，和荷载组合的研究就变得尤为重要。本文就市政道路桥 梁设计荷载及其组合的研究方面进行了简要概述，希望可以促进市政道路桥梁更好的为人民服务。
小丽 陈
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2015 以开孔率为变量,分别对4根腹板开矩形孔口的蜂窝梁和蜂窝组合梁进行了抗剪试验。对比分析了两者的抗剪破坏特征,承载力及剪力-位移曲线。给出考虑楼板组合作用后蜂窝梁抗剪承载力的提高结果。结合修正后的有限元计算模型,对比研究不同开孔率、翼缘尺寸对矩形孔口蜂窝梁和蜂窝组合梁抗剪承载力的影响。对不同混凝土楼板尺寸影响下的矩形孔口蜂窝组合梁进行抗剪性能分析。结果表明:开孔率对矩形孔口蜂窝组合梁和蜂窝梁抗剪承载力影响较大;翼缘厚度对开孔率较小的矩形孔口蜂窝梁抗剪承载力有一定提高,对蜂窝组合梁影响较小 ...
贾连光, 杨建华, 刘永方
doaj
Jianzhu Gangjiegou Jinzhan, 2022 近年来，随着装配式施工的推广，钢-混凝土组合结构的应用越来越广泛。钢-压型钢板混凝土组合梁是组合结构中的常用构件。钢-压型钢板组合梁是通过抗剪连接件将钢梁与压型钢板混凝土组合楼板连接成一个共同工作的整体结构构件，组合梁中通常采用栓钉作为抗剪连接件。因此，对钢-压型钢板混凝土组合梁栓钉连接件的受剪承载力进行准确评估和计算具有重要的工程应用价值。为了获得较理想的栓钉连接件受剪承载力计算模型，对国内外压型钢板组合梁栓钉连接件承载力的研究进行了综述，并收集了相关推出试验的数据 ...
许兰兰, 胡夏闽
doaj