浅谈砌体结构裂缝产生的原因与防治

砌体结构的房屋在中小城市建筑物中占的比例较大,分布较广,而砌体结构中的一般细小裂缝由于不危及使用,往往被人忽略.但这些裂缝在较长时间内还不稳定,降低了建筑物的抗震能力,在地震时容易引发墙体破坏,甚至墙体倒塌,必须重视解决.本文根据本人几年的工作经验,提出自己对砌体结构裂缝产生的原因及其防治的浅显建议.     

大开孔整体补强三通设计计算问题

结合在执行ＳＹ０５１８－９２《油气管道钢制对焊管件设计规定》中出现的问题及设计经验，提出加快设计速度保证设计质量应注意的问题：（１）焊缝系数大小的取值方法。（２）增量Δ１、Δ２的取值方法。（３）削弱系数η的计算方法。     

木桁架齿板连接性能及影响因子研究现状

齿板连接性能的研究,时木桁架及整个轻型框架的木结构设计及性能优化具有重要意义.从齿板连接的前期基础、静态测试、动态测试、破坏模式及连接性能影响因子等方面,详细阐述了国内外齿板连接性能的研究现状,以期为国内齿板连接性能的研究提供借鉴.     

Bending Performance of Tube Gusset Joint in Steel Tubular Tower for Extra High Voltage Transmission Line

This paper explored bending performance of tube gusset joint primarily according to experiment and finite element model. The method which is used to determine ultimate strength of the joint was proposed on the base of three joint types including /4 circle ribbed, half circle ribbed and circle ribbed stiffeners. Compared with the Japanese electricity transmitting steel tubular tower manufacture norm, a conclusion has been drawn that the ultimate strength has relationship with several different parameters. The result shows that the ultimate strength of the joint is related not only to the wall thickness t, diameter D, length of gusset plate B and the yield deflection δ at the top of the relevant section under the current status of the region, but also to the ribbed plate. The formula about ultimate strength has important application value for engineering design.     

New Monitoring and Assessment Method for the Joints of Steel and Concrete Connection in Large span Bridge

The joints of steel and concrete (JSC) is the key substructure to composite bridge, the method of condition monitoring and safety assessment were carried out for JSC with perfobond shear connectors (PBL) and local prestressed tendon in large span bridge. According to the damage mechanism of JSC, new monitoring parameters were proposed. The sensor location layout and the assessment thresholds of PBL were addressed with the consideration of the disadvantage influences of environment, load and concrete creep to local prestressed loss assessment and validated by the static load experiment. Compared the experimental results with field monitoring data, it was found that the new monitoring parameters and new assessment method were feasible and can be used as reference to the same type connectors in large span bridges.     

森林联合生产的经济分析及模型

森林多种产品的生产和利用逐渐成为林业界关注的热点问题,本文利用西方经济学原理分析了森林多种产品生产的相互关系,阐明了对多种产品进行最优利用的原理和经济模型.     

侵权连带责任的理解与适用

侵权连带责任规定的主旨在于保护受害人的权益.侵权连带责任具有整体性等特征,其适用范围比较广泛.侵权连带责任的法律后果分为对外效力和对内效力两部分.我国侵权责任法关于侵权连带责任的规定还需要进一步加以完善.     

农村承包经营户的民事法律主体地位构造

从传统的家户制入手,分析了农村承包经营户在我国现行法律中的困境,提出了农村承包经营户作为民事主体的创设思路:农村承包经营户因在社会生活中具有特定功能,可以作为财产权利主体享有相应财产权,可以成为合同主体签订以及履行合同,也可以作为责任主体承担相应的法律责任,应当以法律规定的方式,明确规定承包经营户的民事法律主体地位,同时对承包经营户内部组成人员的法律关系予以明细化,保护承包经营户以及相关主体的利益。     

民族大学生理科基础课程教学若干问题思考

民族学生在大学期间，要顺利完成一、二年级的基础课程的学习，面临的首要问题就是语言障碍，同时也存在初中和高中基础知识，尤其是高中数理化知识与大学数理化内容的过渡和衔接问题。本文针对民族学生在大学教学中应该注意的数理化基础课程知识、教学方法衔接问题作以分析和论述。     

Variation in the ossification process of the anconeal and medial coronoid processes of the canine ulna

This morphological and radiographic study investigates the ossification process of the anconeal and medial coronoid processes of the ulna in a sample of 142 dogs ranging in age from neonatal to 44 weeks. The anconeal process was noted to develop by appositional ossification, formation of a separate ossification center, or a combination of both. Several developmental stages of the ossification center of the anconeal process as well as its anatomic position and radiographic appearance are described. Differences have been noted in the shape of this ossification center as well as the ossification process itself. The medial coronoid process develops exclusively by appositional ossification. Unlike ossification of the anconeal process, ossification of the medial coronoid process was completed earlier (p < 0.05) in smaller than in the larger dogs. In smaller dogs, both the medial coronoid and anconeal processes were found to be mature by the age of 16 weeks. In the larger dogs, ossification of the anconeal process was completed not before 14 weeks of age and ossification of the medial coronoid process was completed about 6 weeks later.