普通抗拔桩承载时桩身处于受拉状态,在上拔力作用下易产生裂缝进而影响其耐久性与安全性,为避免此缺点的影响,开发了一种带"扩大头锚固端"的压力型抗拔管桩,并通过室内单桩静载抗拔对比试验研究了压力型抗拔桩与普通拉力型抗拔桩的受力机理与承载能力.结果表明:达到承载极限状态时,拉力型抗拔桩桩身出现明显裂缝,压力型抗拔桩桩身完好没有出现裂缝,且极限抗拔承载力比拉力型桩高 25%.两者桩-土摩阻力随深度均呈现"先变大后变小"的趋势,压力型桩的单位面积摩阻力最大值约为拉力型的 3 倍,能更加充分发挥桩侧摩阻力.距离两桩最远处的 3、6 号土压力盒数值非常接近,两桩在土体内的应力场水平影响范围相近.

基于毕业生质量标准的工科人才培养策略主要有:根据人的全面发展需要和专业能力要求来制定毕业生质量标准;根据毕业达标要求与修读进程逆向设计人才培养方案,构建课程体系,设计教学活动以及学习成果考核评价方式;按时间顺序和学习认知规律正向实施课程教学,测评课程目标达成度,综合考核毕业要求达成度,以支撑人才培养目标的实现;对每个教学环节进行过程质量控制,形成持续改进机制.

A fracture forms of masonry wall at the collapse state will decide the resistance to overturning and further affect the seismic collapse patterns of the masonry structures.General methods are proposed for the anti overturning analysis of masonry structures in this paper based on the collapse rule of masonry structures under rare earthquake and the elastic assumption to the remaining parts stress of masonry structures.

以深圳地铁7号线笋洪区间为工程背景,在分析下穿洪湖施工风险的基础上,结合现场施工工艺试验,建立了地铁区间叠线隧道下穿湖泊盾构法施工技术体系,包括砂层围堰排水和注浆加固处理、浅覆土筑岛、上软下硬地层复合盾构掘进、叠线隧道夹层土注浆加固和下隧道内设移动支架的综合施工技术,为今后类似工程提供技术参考.

围绕培养什么样的人、这样的人需要具备哪些能力？这些能力通过哪些课程教学、用什么方式教学获得？这些教学过程对教师提出什么样新的要求，以及教学效果评价等问题，重构土木工程专业课程体系。以工程项目为载体，实行大班授课、小组辅导的专业导师制式专业课程教学改革，编写能力矩阵和课程体系流程图，并将研究成果固化到人才培养计划中，以期改革应用型本科人才培养模式，提高人才培养质量。

The mechanical performance and failure mechanism of profiled constructional column-beam system walls are investigated to understand its mechanical characteristics. In the study, an experimental comparative method is used to compare the situations for normal construction column and profiled construction column under the condition of static vertical horizontal loading. In addition, finite element numerical simulations are conducted. Results demonstrate that masonry block restrained by profiled construction column has excellent seismic behavior. The results are useful for the development of masonry structures.

Through the comparison experiment between the common construction column and"丰"-shape construction column,their stress behavior and deformation ability under static horizontal load are studied.The results show that masonry block restrained by the"丰"-shape construction column has better anti-seismic behavior.

利用圆柱壳的弹性薄壳小挠度理论公式推导出圆柱壳中无粘结预应力筋的等效荷载计算方法,并应用有限元软件ANSYS对结果进行了对比验证。同时也指出,预应力筋应该用来平衡外加荷载而不是直接用来平衡环向力。

研究钢筋混凝土板的早期承载力的发展规律对施工期钢筋混凝土结构安全性控制至关重要.由于影响钢筋混凝土板早期承载力的因素的复杂性,目前对钢筋混凝土板的早期承载力发展还没有进行过全面的研究.本文根据我国<混凝土结构设计规范>(GB20010-2002)的钢筋混凝土板极限承载力计算方法,利用混凝土早期抗压强度发展规律,对钢筋混凝土板早期承载力的发展进行了全面研究,为施工期钢筋混凝土建筑结构安全性控制分析提供依据.

提出了一维Lagrange粘性差分格式,建立了一个有效的计算模型,对空腔的底部压力、风速进行了计算分析,为削波试验提供了理论上的指导.

A kind of constructional column-beam system of masonry structure is presented,which makes the columns playing initiative role adequately and can improve the collapse performance of composite wall during a building standing for load by reducing the distance of column-beam.The calculated results by finite element method indicated that the stiffness and bearing capacity of the system are improved a lot to the old one of masonry structure, and this structure system will have a good future if applied to large-bay residence structure.

通过约束砌块砌体在水平力和竖向力作用下破坏过程的分析,认为砌块砌体的破坏是砌块克服砌块和砂浆之间的摩擦产生滑移而引起的.利用大型通用计算程序ANSYS中的接触单元(contact)可以进行仿真计算,计算结果证明了以上的观点.

In this paper,the history of the research on earthquake resistance of masonry structure was reviewed since 1960's in our country.The authors think that,in the coming future,the concrete block will be one of the prevalent materials of masonry structure in our country and propose that the research on the basic property of masonry is the most important for aseismatic research on masonry structure.

In this paper, the design and the antiseismic experimental results of a full scale building of 6 story porous brick and small size hollow concrete block structure with constructional column-beam are presented. The test results are analyzed and the seismic bearing capacity of this type of building is evaluated. According to the results , some conclusion and further recommendations for design are proposed .