浅论高层民用建筑剪力墙结构设计

随着经济建设的发展以及建筑业的迅猛发展,对于民用建筑的要求也就越来越高。本文针对高层民用建筑剪力墙结构设计进行简单的讨论。     

某驱动桥半轴套管断裂分析和优化设计

后桥是汽车的关键零部件,起着承受载荷和扭矩的作用,一旦出现断裂,将严重影响乘客的生命安全,故对其失效模式分析尤为重要。本文对一款新型后桥在道路试验过程中发生半轴套管断裂的失效模式进行分析,通过材质检测及理论计算,对失效因素进行排查。最终找到失效原因,并提出改进措施,避免再次失效,对提高汽车的安全性意义重大。     

浅述商品混凝土裂缝的形成与预防

随着城市化的建设和建筑技术的发展,建筑规模逐渐扩大,楼房的层数不断增高,混凝土的设计强度标号也随之增大,加之施工现场越来越小,而商品混凝土作为建筑半成品的主要材料,以其质量可靠,施工方便,节省施工现场,提高施工效率,节能环保等特点,商品混凝土已被建筑市场广泛采用,但商品混凝土裂缝问题已成为工程结构的一个普遍质量问题,且日趋增多。本文通过庆阳市建设大厦工程实例,分析裂缝的形成,从源头着手达到预防和控制的目的。     

Complicated head trauma from machete wounds: the experience from a tertiary referral hospital in Jamaica

There have been limited reports on machete wounds to the cranium. This study was carried out to document the injury profile in a series of patients who have sustained cranial injuries from machete wounds in this setting. Between 1 January 1998 and 1 January 2008, demographic and clinical data were retrospectively collected from all patients treated with complicated head injuries from machete wounds with at least one of the following clinical or radiological features: a recorded Glasgow Coma Score < 8 at any point during admission; compound skull fractures; protruding brain matter; cerebrospinal fluid (CSF) leaks; intra-cranial bleeding; parenchymal contusions; lacerations and/or oedema. The data were analysed using the SPSS version 12.0. Of the 40 patients with complex injuries to the cranium, there was a 6:1 male preponderance with a mean age of 32.5 ± 13.7 years (Mean ± SD). The injuries included open skull fractures in all the 40 (100%) patients, depressed skull fractures in 20 (50%) patients, CSF leaks in 4 (10%) patients, protruding brain matter in 4 (10%) patients, cerebral contusions in 3 (7.5%) patients and extra cranial injuries in 16 (40%) patients. Tetanus prophylaxis and intravenous antibiotics were administered to all patients, and phenytoin was required in 16 (40%) cases. There were 37 (92%) patients requiring operative intervention at a mean of 10.4 h after presentation (SD ± 18.1; Median 6). The operative procedures included elevation of depressed fractures in 20 (54.1%) patients, dural repair in 10 (27.0%) patients and intra-cranial debridement in 7 (18.9%) patients. There were three deaths (7.5%), and seizures were recorded in 5 (12.5%) cases with no reports of infectious morbidity. Eighty percent of patients had a normal Glasgow outcome score on discharge. Complicated machete head trauma is uncommon at this health care facility in Jamaica. We achieved a satisfactory outcome with aggressive management consisting of prompt assessment of the extent of injury, appropriate antibiotics, anticonvulsants for those with seizures or cortical injury and early operation to decrease the risk of complications.     

股骨干骨折合并侧髋关节脱位临床分析

本文报告了三例临床上少见的股骨干骨折合并同侧髋关节脱位，其特点是：发生率低，合并其他部位损伤多；早期确诊率低，髋关节脱位漏诊率高；徒手复位成功率低，手术率高。分析了漏诊原因及其防止措施，并提出了处理骨折与脱位的方法。     

不同连接装配式剪力墙抗震性能及碳排放综合效益分析

在我国加快建筑产业转型和“碳中和”的背景下，面对我国多高层装配建筑产业现代化发展的需求，量化研究不同形式装配式剪力墙之间碳排放量及性能的关系规律,建立物化阶段构件的碳排放计算模型，比较不同连接形式装配式剪力墙的碳排放计算差异。结果表明：碳排放计算差异主要体现在不同形式装配式剪力墙的工艺流程方面，单位体积不同连接方式装配剪力墙的碳排放量差距较小；装配式剪 力墙连接方式较大程度影响其碳排放量和性能提升。     

G310国道加宽改建差异沉降分析与处理技术

结合G310国道旧路加宽改建工程施工初期探索,阐述了加宽工程新、旧路基沉降的主要影响因素、分析沉降变形机理及主要防治控制技术措施,分析了加宽路基沉降计算方法及沉降动态观测要求。     

碳纤维片材加固混凝土桥梁结构的应用研究

在不断进行新建设、发展新技术的同时,建筑行业正面临着如何对已有的桥梁进行维护和改造的问题,而碳纤维片材作为已知的结构加固材料,如何有效地利用到对现有桥梁工程进行加固修复作业中,使之满足新形势下的需要,已经成为国内外建筑业中的一个重要课题,必须就此进行深入的研究。     

弧形封闭管道断面流速模型研究

对于弧形封闭管道的紊流速度分布研究也是基于圆形断面管道紊流的理论基础之上,并且结合一定的假设来数值模拟弧形封闭管道的紊流速度分布规律。通过大量的实验证明本文的研究方法及程序较好的模拟了弧形封闭管道的紊流速度分布情况,为下一步研究淤积管道的解决方法提供了理论依据。     

岩溶地基人工挖孔桩施工处理措施

在岩溶地基上设计人工挖孔桩时，尽最大限度地利用原场地基岩，不作大的处理，满足桩的承载力要求，论述了常见问题的处理方法。