底部框架砖房抗震设计中应注意的问题

作者根据哈尔滨实际情况,论述了底部框架砖房防震设计中应注意的问题。对指导哈尔滨城市建设,具有一定的实用性。     

Experimental Analysis of Vibration Behavior for Large-span Underground Structure

In this paper, a shaking table test for large-span underground structure is introduced. Based on the test, the frequency of inherent vibration, damping ratio and the dynamic response of the structure are studied. The response of the underground structure for vertical seismic excitation is studied as a key point. With the different imbedding depth, the influence of interaction of soil and structure on the earthquake-resistant capacity of the underground structure is discussed.     

A PRELIMARY STUDY FOR PLANNING OF EARTHQUAKE HAZARD PREVENTION FOR TOWNS AND CITIES IN MOUNTAIN REGION

Based on the contributing factors of earthqutake,its hazardregularity and the site investigation at Tongjing town in Chongqing,thispaper presents suggestions on the basis,principle and aim of earthquakeplanning in mountainous region,cities and towns as well as site selection,general layout of city,building arrangement,road width and quakeproofsafe area establishment,etc,     

Experimental Analysis of Fire Resistant Performance of Concrete Frame with Damage Caused by Weak Earthquake

Two monolayer concrete frames with the same reinforcement, KJ1 and KJ2, were designed. KJ1 was designed to simulate low cyclic reversed loading test under weak earthquake. Besides, the fire response test, including temperature rising and lowing, was made by fixing the axial compression ratio of the column. For KJ2, the fire response test at the fixed axial compression ratio was made. The deformation response of the concrete frames in fire was studied. Comparative analysis of the apparent phenomenon, temperature curves, bearing capacity change of the frames were made based on the test results of KJ1 and KJ2. According to the simplified temperature distribution, the ultimate bearing capacity of the column under the high temperature was preliminarily determined. It is illustrated that the calculation results and finally test phenomenon are consistent according to the simplified section.     

关于地震区框架梁正截面强度计算问题的探讨

本文根据国家标准《建筑抗震设计规范》和近年来结构试验资料,对框架梁在不同设计阶段工作情况进行了分析,提出了承受均布荷载情况下,梁端按双筋截面计算的方法。该法计算简便,既可节约钢材,又能保证强度,可供工程技术人员参考。     

土坝震害预测

 本文用数理统计分析法,找出了影响土坝震害的主要因素,并分别给出了地震烈度为7,8,9度时的土坝震害预测经验公式.     

考虑场地各向异性的结构输入地震反应谱调整

为了预测地震动特性，同时考虑场地土动力特性各向异性及其对结构输入地震动的影响，基于地震各向异性理论，提出了场地动力特性各向异性的概念，研究了场地动力特性各向异性的微动测试分析方法．考虑地震动的各向异性特征，分析了地震动各向异性对结构地震动力响应的影响，以及结构分析中现有的地震时程选择和调整中存在的问题，提出了基于场地徽动测试确定场地动力特性及其各向异性的输入地震动调整新思想．     

多层砌体房屋楼层地震剪力的简化计算

根据建筑抗震设计规范的有关规定，对多层砌体房屋楼层地震剪力的计算。提出了一种经算法，编制了计算程序和表格。通过算例将本文方法与规范方法进行了对比，结果表明本文方法简单、实用、准确。     

南水北调工程洛河渡槽耦合动力分析

在合理模拟临跨的静态荷载以及质量影响的基础上.采用三维有限元对南水北调工程洺河大型渡槽典型槽段单跨渡槽进行结构地震动力分析.对于影响渡槽结构动力响应的盆式支座、槽内水体与结构的流固耦合作用以及桩基-土体的动力相互作用,参照相关规范的原则和相关研究成果,在尽可能反映其实际影响和合理简化的基础上进行模拟,研究了结构自振特性、结构各部位的动力位移、应力以及内力响应.计算结果表明:采用不同水体模拟方法和不同计算分析方法得到的动力响应规律是一致的,动力响应值比较接近.