高层办公楼倾斜结构的设计与验算

叙述了仕嘉SOHO楼的基础设计、抗震设计。分析了倾斜部分的受力特征。并介绍了倾斜型钢混凝土构件的构造措施。     

Unsaturated elasto-plastic constitutive equations for compacted kaolin under consolidated drained and shearing-infiltration conditions

Transient process of water flow changes the equilibrium conditions of an unsaturated soil, resulting in volume change of a soil. The volume change alters the hydraulic properties of the soil and thus influences the transient process of water flow through the soil. Therefore, the interactive processes between stress-strain behavior and pore-water pressure are the primary processes affecting the mechanical behavior of unsaturated soils. This paper presents coupled elasto-plastic constitutive equations for unsaturated compacted kaolin under consolidated drained and shearing-infiltration conditions. The study focused on the development of the suction increase (SI) yield curve that incorporates changes in matric suction during transient processes. In addition, the relationship of change in specific water volume with respect to net mean stress and matric suction was also proposed by incorporating the hysteresis of soil-water characteristic curve. The simulated results by the proposed constitutive model were compared with those obtained from isotropically consolidated drained tests and shearing infiltration tests of compacted kaolin to verify the proposed model. The simulated results are in close agreement with the experimental results.     

一种简单实用的家庭报警系统

文中提出了一种新颖的家庭报警系统，充分利用家庭的现有资源，实现了资源的充分利用。     

折流杆式换热器的研究、设计和应用

本文讨论了折流杆式换热器的研宄,设计和应用,阐述了其传热效率高、压降低、抗振动、耐结垢等优点,展示了该换热器在我国石油化工、动力等领域进一步推广的广阔前景。     

对南方海相碳酸盐岩区勘探的思考

回顾、总结南方海相碳酸盐岩区４０余年的勘探历程、失利原因,借鉴四川盆地勘探经验教训,并结合该区具体构造演化过程,提出评价、成选下步勘探目标的途径和具体操作方法。研究表明区域盖层、古隆起、后期保存条件匹配良好的构造单元是下步有利的勘探目标。     

中上扬子区层序样式对盖层封闭性的控制作用

中上扬子区海相沉积主要表现为T型、H型和TH型3种层序样式,不同层序样式对成藏要素的控制作用不同。相对于T型、TH型,盖层沉积及演化主要受H型样式控制。对于泥质岩盖层,H型样式的二级层序海侵体系域(TST)下部的盖层质量较好;对于膏盐岩盖层,它们多出现于快速海侵、缓慢海退的H型样式的二级层序高水位体系域(HST)中。同时,H型样式泥岩在三级层序内的TST也有利于油气封盖;在湖南古丈县罗依溪镇的栖凤隧道剖面上,由HST到TST,突破压力从小变大,比表面积从大变小,页岩中的砂质含量变小、灰质含量增大,显然,H型样式泥质岩类盖层TST明显比HST好。     

多室气升式环流反应器流动特性的数值模拟

在空气-水两相多室气升式环流反应器（MALR）中,采用欧拉欧拉两相流模型对扇形反应室内气液两相流动过程进行了数值模拟研究,考察了上升室的气含率、液体速度随表观气速的变化,最后用实验数据对模拟结果进行了验证.结果表明,某一上升室气含率受该室表观气速的影响较大,与另一上升室表观气速的影响较小;循环液体与上升室流体流动型式有关;气含率和循环液速的模拟值与实验值的平均相对误差分别为5.36％和8.28％;说明了应用数值模拟方法研究MALR流动特性的可行性.     

米力农互变异构的理论计算

采用B3LYP/6-311G(d,P)法,分析米力农分子的酮式与烯醇式构型的构象.再采用相同方法,在气相和水相中计算并考察烯醇式与酬式结构互变时,质子迁移的两种可能途径:(a)分子内质子迁移,(b)水助质子迁移.结果表明,后者所需的活化能较小,氢键在降低反应活化能方面起重要作用,PCM溶剂化对分子几何结构参数和反应活化能的影响较小.     

Diffusion and sorption of benzene vapor through polybutadiene‐, polybutadiene/styrene‐, and polybutadiene/acrylonitrile‐based polyurethanes

A series of polyurethane (PU) films made from toluene diisocyanate (TDI), 1,4‐butanediol (BDO), and hydroxyl‐terminated polybutadiene (HTPB), hydroxyl terminated polybutadiene/styrene (HTBS), or hydroxyl terminated polybutadiene/acrylonitrile (HTBN) was synthesized by solution polymerization. The absorption of benzene vapor was found mainly in the soft phase. The equilibrium adsorption (M_∞) was reduced with increasing hard segment content for all the PUs. The values of M_∞ were in the sequence of HTBN‐PUs > HTBS‐PUs > HTPB‐PUs, which could be explained by the different interaction parameters between soft segments and benzene. The HTBN‐PU film showed the lowest degree of phase segregation and had more hard segments intermixed in the soft phase, restricting the movement of soft segments, and therefore resulted to non‐Fickian behavior, while the HTPB‐PU is antithetical. FTIR and atomic force microscopy were utilized to identify the hydrogen bonding behavior and morphology change of the PU films before and after the absorption of benzene vapor. The tensile strength of the HTBN‐PUs showed a greater decrease than that of HTBS‐PUs and HTPB‐PUs after absorbing benzene vapor. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 2984–2991, 2004