Seismic Wall Research Articles

Nonlinear earthquake response analysis and energy calculation for seismic slit shear wall structures

Based on the concept of structural passive control, a new type of slit shear wall, with improved seismic performance when compared to an ordinary solid shear wall, was proposed by the authors in 1996. The idea has been verified by a series of pseudo-static and dynamic tests. In this paper a macro numerical model is developed for the wall element and the energy dissipation device. Then, nonlinear time history analysis is carried out for a 10-story slit shear wall model tested on a shaking table. Furthermore, the seismic input energy and the individual energy dissipated by the components are calculated by a method based on Newmark-β assumptions for this shear wall model, and the advantages of this shear wall are further demonstrated by the calculation results from the viewpoint of energy. Finally, according to the seismic damage criterion on the basis of plastic accumulative energy and maximum response, the optimal analysis is carried out to select design parameters for the energy dissipation device.

Seismic behavior of a new type of seismic energy dissipation shear wall system

A new seismic energy dissipation shear wall structure is proposed in this paper. The new shear wall is one with purposely built-in vertical slits within the wall panel, and various seismic energy dissipation devices are installed in the vertical slits so that the dynamic characteristics of the structure (for instance, lateral stiffness, ductility and fundamental period) can be controlled. In order to verify this concept, shaking table tests of two 10-story shear wall models were carried out, and the seismic behavior of the two models are studied by analyzing the test data and computing the nonlinear seismic response of the models.

水平荷重をうける 3 層有開口独立耐震壁の応力分布 (II) : 置換トラス法による耐震壁の研究第 6 報

水平荷重をうける 3 層有開口独立耐震壁の応力分布 (II) : 置換トラス法による耐震壁の研究第 6 報

水平荷重をうける 3 層有開口独立耐震壁の応力分布 (I) : 置換トラス法による耐震壁の研究第 5 報

水平荷重をうける 3 層有開口独立耐震壁の応力分布 (I) : 置換トラス法による耐震壁の研究第 5 報

水平荷重をうける 3 層無開口独立耐震壁の応力分布について : 置換トラス法による耐震壁の研究・第 3 報

Some 3 storied seismic walls subjected to lateral uniformly distributed load were analysed by a lattice analogy. (See Part I, II). From these results, the author demonstrated the distributions of the stresses and obtained as follows : 1. σ_x has small values generally, but are affected considerably by the frames. 2. σ_y varies straightly almost near the center of the wall, but at the other parts they are seriously affected by their frames. 3. τ has the distributions similar as the elementary theory, and the effects of the frame on τ are little. 4. For σ_1 consists of the previous stresses, in character, are alike τ at the upper stories and σ_y at the lower, respectively. However, these relations are varied extremely with the variation of the stiffness of their frames.

水平荷重をうける無開口独立耐震壁の変形について : 置換トラス法による耐震壁の研究第 2 報

Using a lattice analogy reported in Part I (Trans. of A.I.J. No.105), the auther analysed some seismic walls subjected to lateral loading as a two dimensional problem. The walls used in this study has 3 or 10 stories and the thickness of each parts as shown in Table I. In the obtained results, the properties of horizontal displacement of the wall, the effects of the ratio between the thickness of wall and that of column, and of steel bars on the deformation are presented mainly, and then, these results are compared with the values by the elementary theory on cantilever.

2084 耐震壁を有する立体剛節骨組の不同沈下と横力負担係数の性状について

2084 耐震壁を有する立体剛節骨組の不同沈下と横力負担係数の性状について

置換トラス法による耐震壁の研究(第1報) : 計算精度および3層独立耐震壁について

This report deals with the analysis of the deformation and stress distribution of seismic wall, as a plane stree problem, by a lattice analogy using the element shown in Fig. 1 (c). Firstly, to demonstrate the accuracy of the method are selected three examples which were obtained the exact solutions or the results by the experiment, and then the method is applid to the free standing seismic wall which has three stories. Conclutions were obtained from these investigations are as folows; From the check of the method, except the parts in which has irregularities, it appears that a relatively coarse mesh can give good results, and it can be made the error under 3 percent in general. For the seismic wall, 1) The wall takes about 90 percent of the shearing force in each story. 2) At the center line of wall, the value calculated by the elementary theory seems to give more good results for the shear deflection rather than for the deflection by bending.

2054 境界効果をともなう高層耐震壁の横力負担ならびに応力分布に関する理論的研究 : その2・荷重分布及び基礎回転の影響(構造)

2054 境界効果をともなう高層耐震壁の横力負担ならびに応力分布に関する理論的研究 : その2・荷重分布及び基礎回転の影響(構造)

2053 境界効果をともなう高層耐震壁の横力負担ならびに応力分布に関する理論的研究 : その1・等分布荷重の場合(構造)

2053 境界効果をともなう高層耐震壁の横力負担ならびに応力分布に関する理論的研究 : その1・等分布荷重の場合(構造)

244 耐震壁の配置と基礎の固定状態による架構の剛性に関する実験(構造)

244 耐震壁の配置と基礎の固定状態による架構の剛性に関する実験(構造)

226 耐震壁の配置に関するゴム模型実験(第1報)(構造)

226 耐震壁の配置に関するゴム模型実験(第1報)(構造)

227 耐震壁の配置に関するゴム模型実験(第2報)(構造)

227 耐震壁の配置に関するゴム模型実験(第2報)(構造)

228 ゴム実験による高層開口耐震壁の剛性に関する研究 : 計算値との比較検討(構造)

228 ゴム実験による高層開口耐震壁の剛性に関する研究 : 計算値との比較検討(構造)